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International Space
Station - ISS
North Korean
MKS-4 Satellite
HD Video from
ISS cams (with overlay)
+Flare Predictions
In this page you can track in real time all the satellites orbiting the Earth, with both 2D and 3D interactive representations, predict their passes, view their trajectory among stars on an interactive sky chart, predict satellite flares and transits (across the Sun and the Moon), find out the best location to see these events on a detailed Google map. You can also follow satellite re-entries and other special events, join the observer community, post messages and share your comments and observations. Currently in our database we have more than 9000 observation reports!. You won't find any other tracker that provides all these functions!

Read Observers' Reports! is the only website that has a public DB of satellite observations where you can search for flare reports

Latitude [deg]
Altitude [km]
DEC J2000 [d:m:s] Sun El.[deg]
Longitude [deg]
Azimuth [deg] RA J2000 [h:m:s] Loaded SAT :

JD Elevation [deg] Magnitude


Do you want to observe the International Space Station crossing your sky?
Install our 3D tracker for Android devices and you have just to point your phone to the sky and follow the line to find the ISS. You can also track the Station 24 hours a day with a 3D view of the Earth, constellations and more than 15.000 stars. A simple count down will inform you when you can actually see the ISS with the naked eye. Visit this web page for more details or for downloading the App.

News from Space and Spaceflights

20/05/2016 - Some supernovae have a reserve tank of radioactive fuel that cuts in and powers their explosions for three times longer than astronomers had previously thought. A team of astronomers jointly led by Dr. Ivo Seitenzahl from The Australian National University (ANU) detected the faint afterglow of a supernova, and found it was powered by radioactive cobalt-57. The discovery gives important new clues about the causes of Type Ia supernovae, which astronomers use to measure vast distances across the univ ... (source: - more...)

20/05/2016 - The International Space Station’s robotic assets paid a recent visit to AMS-02 (Alpha Magnetic Spectrometer -02) to survey the external health of the payload and gain imagery ahead of a potential servicing EVA. This week marked the fifth anniversary since AMS-02 was launched to the orbital outpost in the payload bay of Space Shuttle Endeavour, as it continues its investigation into cosmic rays. (source: - more...)

19/05/2016 - Orbital ATK has unveiled preliminary plans to place a four-person habitat in cislunar space by 2020. The announcement during testimony to the U.S. House of Representatives Subcommittee on Space would not only see the creation of a permanent human presence in lunar orbit by the start of the next decade, but would potentially provide a wealth of regularly-scheduled missions for SLS and Orion. (source: - more...)

18/05/2016 - External Tank 94 is in the final stretch of its voyage from New Orleans, Louisiana, to its new home at the California Science Center in Los Angeles. Towed on a barge by a tugboat up the California coast, the tank arrived in Los Angeles county at Marina del Rey on Wednesday and will be moved across LA, like Space Shuttle Orbiter Endeavour was in October 2012, to the Science Center on May 21. (source: - more...)

17/05/2016 - Engineers have begun the construction of two huge Tail Service Masts that will play a crucial role with the Space Launch System (SLS) on launch day. The TSMUs (Tail Service Mast Umbilicals) will be tested on the Vehicle Motion Simulator (VMS) at the Kennedy Space Center, before being installed on the deck of the Mobile Launcher (ML). (source: - more...)

15/05/2016 - The Chinese have launched the Yaogan-30 remote sensing satellite via a Long March (Chang Zheng) 2D (Y27) rocket on Sunday. The launch – from the from the Jiuquan Satellite Launch Center – took place at 02:43 UTC from the 603 Launch Platform at the LC43 Launch Complex. (source: - more...)

15/05/2016 - The recently recovered Falcon 9 first stage (F9-0024-S1) has arrived inside SpaceX’s Pad 39A Horizontal Integration Facility (HIF) following its recovery after the JCSAT-14 launch. The stage is being housed alongside the other two recovered cores, providing a glimpse into the triple-core processing that will be conducted ahead of the maiden launch of the Falcon Heavy. (source: - more...)

13/05/2016 - The semi-classified X-37B robot spaceplane hasn't received much attention, despite the fact that it is on its fourth flight in space. At least, that's the official story. Launched in May 2015, the latest mission seems even more covert than the three previous launches. Absolutely no images of the spaceplane were released before launch. That's a big change from the past, when we saw high-resolution images of the vehicle before launch and after landing. Nobody knows when X-37B is coming home. It's ev ... (source: - more...)

13/05/2016 - ISS partners – NASA and Roscosmos – have conducted a bilateral Technical Interchange Meeting (TIM) to refine procedures relating to the disposal of the Station at the end of its service life, or in the event of an emergency. The deorbit burn capability – which won’t exist until at least 2017 – requires multiple docked vehicles firing in unison to push the Station to its fiery demise. (source: - more...)

12/05/2016 - Boeing has completed a major milestone in their drive to help NASA regain domestic access to space with the mating of two critical portions of their CST-100 Starliner Structural Test Article to complete the first hull of the commercial vehicle. Meanwhile, Boeing has informed investors that the first crewed launch of Starliner will be delayed at least a full year to 2018 due to development issues. (source: - more...)

11/05/2016 - After 31 days of docked operations at the International Space Station (ISS), SpaceX s CRS-8 Dragon spacecraft completed the final aspect of its mission as astronauts aboard the Station unberthed the spacecraft to send it on its way toward a fiery reentry into Earth’s atmosphere for a splashdown and recovery in the Pacific Ocean, which was successfully completed on Wednesday. (source: - more...)

11/05/2016 - Scientists from Princeton University and NASA have confirmed that 1,284 objects observed outside Earth's solar system by NASA's Kepler spacecraft are indeed planets. Reported in The Astrophysical Journal on May 10, it is the largest single announcement of new planets to date and more than doubles the number of confirmed planets discovered by Kepler so far to more than 2,300. The researchers' discovery hinges on a technique developed at Princeton that allows scientists to efficiently analyze thousa ... (source: - more...)

09/05/2016 - Fresh from its unique three engine landing success, the Falcon 9 first stage (F9-0024-S1) has arrived back to the Florida coast from where it successfully launched the JCSAT-14 satellite. Proudly stood in the middle of the deck on the Autonomous Spaceport Drone Ship (ASDS), this is the third Falcon 9 first stage to be recovered after a launch. (source: - more...)

08/05/2016 - Kennedy Space Center’s famous launch pads are continuing their regeneration work in preparation for hosting their first orbital launches since the end of the Space Shuttle Program. Pad 39B will host the most powerful of the new fleet of rockets, requiring a complete modernization of its Flame Trench – a process that includes replacing its famous brick wall. (source: - more...)

05/05/2016 - Making its fourth flight of the year, SpaceX’s Falcon 9 rocket has deployed the JCSAT-14 communications satellite Friday. The mission, which included another – and successful – experimental attempt to recover the rocket’s first stage, launched from Cape Canaveral at the start of a two-hour window that opened at 01:21 local time (05:21 UTC). (source: - more...)

04/05/2016 - An international team of astronomers composed of UC San Diego astrophysicists has discovered three Earth-sized planets orbiting near the "habitable zone" of an ultracool dwarf star, the first planets ever discovered around such a tiny and dim star. The discovery is detailed in a paper published this week in the journal Nature. The planets are so close to Earth - only 40 light years away - that astronomers should eventually be able to study in greater detail the composition of each of the planets a ... (source: - more...)

03/05/2016 - Following a banner week for what was once the new kid on the block, SpaceX has secured a coveted US Air Force launch contract in the same week the company announced a joint venture with NASA to send its Red Dragon human rated spacecraft to Mars in 2018 while also announcing new maximum performance margins for its flagship Falcon rockets. (source: - more...)

02/05/2016 - NASA’s Jet Propulsion Laboratory (JPL) is making progress with the build up of Mars 2020 Rover, with contract awards for instrumentation and hardware. Following the recent announcement (source: - more...)

01/05/2016 - SpaceX has completed a crucial static firing of their Falcon 9 rocket ahead of the upcoming mission to loft the JCSAT-14 satellite for the Tokyo-based SKY Perfect JSAT Corporation. The static fire took place late on Sunday at SLC-40 at the Cape Canaveral Air Force Station ahead of a planned launch on Thursday, 5 May. (source: - more...)

29/04/2016 - Despite successfully lofting the OA-6 Cygnus safely into orbit, United Launch Alliance (ULA) engineers have been investigating the first stage launch phase of the Atlas V’s March mission. The Atlas V booster shutdown several seconds ahead of schedule due to what is now classed as a fault with RD-180 Mixture Ratio Control Valve (MRCV) assembly. (source: - more...)

28/04/2016 - India has launched a PSLV rocket carrying the IRNSS-1G navigation satellite. The launch, which took place early Thursday afternoon local time, completes deployment of the first-generation IRNSS constellation, giving India a fully-operational regional navigation system. (source: - more...)

27/04/2016 - SpaceX has entered into an agreement with NASA for a Dragon mission to Mars, set to take place as early as 2018. Known as “Red Dragon”, the variant of the Dragon 2 spacecraft will be launched by the Falcon Heavy rocket, ahead of a soft landing on the surface of Mars. The mission is also part of an agreement with NASA to gain further data on Mars landings. (source: - more...)

26/04/2016 - A Soyuz rocket will make the first launch from Russia’s Vostochny Cosmodrome on Thursday – carrying the Mokhailo Lomonosov research satellite and two small secondary payloads – following a late scrub on Wedneday. Liftoff from the brand new launch site is scheduled for 11:01:00 local time (02:01 UTC). (source: - more...)

25/04/2016 - As part of its increasing dedication and ramp up of activities at the red planet, NASA has announced a solicitation of ideas for a new Mars orbiter in the 2020s that will be tasked with a variety of scientific objectives as well as an enhancement of the communications network around the red planet in advance of human exploration of Mars in the 2030s and beyond. (source: - more...)

23/04/2016 - Russia’s Soyuz ST-A rocket launch with the European Space Agency’s Sentinel-1B spacecraft and four small satellites has been moved to Monday due to unacceptable weather for both Friday and Saturday’s attempts and then a technical scrub on Sunday. In what will be the rocket’s first launch of the year from its South American launch site. Liftoff is scheduled for 18:02:13 local time (21:02 UTC). (source: - more...)

21/04/2016 - Orbital ATK and NASA have entered into an agreement to begin negotiations over the potential use of High Bay 2 inside the Vehicle Assembly Building (VAB). The discussions, which also include the use of a former Shuttle Mobile Launch Platform (MLP), are being aligned towards Orbital ATK’s future possibilities involving the development of an EELV-class Next Generation Launch vehicle. (source: - more...)

20/04/2016 - As part of its initiative to advance exploration in the solar system, NASA has awarded Aerojet Rocketdyne a contract for two crucial elements of an Advanced Electric Propulsion System. The new system will meet enhanced propulsion needs of upcoming robotic and human missions in an effort to increase efficiency over traditional, chemical-based propulsion. (source: - more...)

20/04/2016 - Engineering Physics students at Embry-Riddle Aeronautical University's Daytona Beach Campus have made several high-cadence telescope observations of the recently damaged Hitomi X-ray satellite and several of its debris pieces. Hitomi, also known as ASTRO-H, was a Japanese X-ray astronomy satellite that was launched in February. The $275 million spacecraft was 46 feet long when deployed and weighed 6,000 lbs. It carried a number of scientific instruments, including a unique device called an X-ray m ... (source: - more...)

19/04/2016 - The first stage of the SpaceX Falcon 9, that successfully helped launch the CRS-8 Dragon to the ISS prior to landing on a drone ship in the Atlantic, has completed its Port Canaveral processing. The stage has now been transported to KSC for a series of static fire tests, with the ultimate goal to clear it for an upcoming mission that would mark the first reuse of a returned SpaceX booster. (source: - more...)

15/04/2016 - The Bigelow Expandable Activity Module (BEAM) was finally installed on the International Space Station (ISS) on Saturday. The Space Station Remote Manipulator System (SSRMS) was involved with the removal of the payload from trunk section of the recently arrived CRS-8 Dragon, prior to translating the new module to the Station’s Node 3 port. (source: - more...)

14/04/2016 - It was heartening to see President Obama's tweet to congratulate Spacex on that picture perfect first stage touchdown on their "of course I still love you" drone ship in the Atlantic last week, heralding the arrival of a new era in rocketry, emphasizing affordability and sustainability, the hallmarks of the newspace movement . At the same time, it is perplexing that not one of the presidential candidates running for office has yet to mention, let alone pay lip service to the nation's space program that ... (source: - more...)

14/04/2016 - United Launch Alliance (ULA) successfully conducted a Wet Dress Rehearsal (WDR) on Thursday for its Delta IV- Heavy tasked with the launch of the NROL-37 spacecraft. Meanwhile, the company is continuing to evaluate the underperformance issue with its most recent Atlas V mission, while agreements were signed for its future rocket, the Vulcan – specifically related to the payload fairings. (source: - more...)

12/04/2016 - April 12, 1961: the USSR ushered in the era of human spaceflight with the launch of Yuri Gagarin on a single orbit flight of the Earth. Now 55 years after the historic first human spaceflight, United Launch Alliance (ULA) and Bigelow Aerospace have unveiled plans for the first ever commercial space stations. (source: - more...)

11/04/2016 - United Launch Alliance (ULA) and Bigelow Aerospace have announced a partnership agreement to launch two of Bigelow s inflatable B330 space habitats. The modules would be designed and built… (source: - more...)

09/04/2016 - For the first time in a year, the International Space Station has welcomed the arrival of a Dragon spacecraft from SpaceX following a flawless launch Friday afternoon from… (source: - more...)

08/04/2016 - SpaceX’s Dragon spacecraft returned to flight Friday with the CRS-8 resupply mission to the International Space Station: a mission which also carries a prototype inflatable module for the outpost. The first Dragon mission since a launch failure last June, Friday’s mission lifted off from Cape Canaveral at 16:43 EDT (20:43 UTC), followed by a historic first stage landing on the ASDS. (source: - more...)

07/04/2016 - The Marshall Space Flight Center (MSFC) has issued a “Justification for Other Than Full and Open Competition (JOFOC)” solicitation in support of sole sourcing RL10 engines for the Exploration Upper Stage (EUS) from Aerojet Rocketdyne. The document calls for an initial order of 10 engines to cover the first two flights of the Space Launch System (SLS) with the powerful upper stage. (source: - more...)

07/04/2016 - Bong Wie sent his hands flying, simulating an explosion right there in his Howe Hall office. If his ideas become reality and spacecraft carrying nuclear explosives fly into asteroids one day, "The asteroid can be pulverized - not just fragmented - into dust!" he said, his hands going wild. For Wie, a 64-year-old professor and Iowa State University's Vance D. Coffman Endowed Faculty Chair in aerospace engineering, asteroid deflection - aka saving the planet - is all about the engineering. Visit his ... (source: - more...)

05/04/2016 - SpaceX has conducted a crucial static fire of their Falcon 9 rocket ahead of Dragon s return to flight mission to the International Space Station. The company transported its… (source: - more...)

05/04/2016 - Following in the steps of the Shijian-8 mission in 2006, China has launched the Shijian-10 recoverable satellite. The launch of Shijian-10 took place at 17:38 UTC on Tuesday using a Long March-2D launch vehicle from the 603 Launch Pad at the Jiuquan Satellite Launch Center’s LC43. (source: - more...)

04/04/2016 - The Cassini spacecraft is conducting a fly-by pass of Titan on Monday, a pass that will involve two major science observations. Known as the “T-118” Titan encounter, two Cassini instruments are being employed to sniff and observe the moon’s atmosphere before beaming the information back to Earth for evaluation by scientists. (source: - more...)

03/04/2016 - Blue Origin conducted another test flight of its New Shepard rocket at the weekend, continuing a test program aimed at its suborbital space tourism goals. Marked by a successful – and sporty – landing at the company’s West Texas site, this booster has now launched and landed three times since its debut in November. The vehicle’s capsule also enjoyed a safe return to terra firma. (source: - more...)

02/04/2016 - Russia’s Progress MS-2 cargo vehicle has successfully docked with the International Space Station (ISS) on Saturday. This mission is the first of three Russian resupply efforts to the Space Station this year and the second immediate resupply mission to the ISS in the last nine days following the Orbital ATK Cygnus launch. (source: - more...)

01/04/2016 - The Earth's magnetic field permanently protects us from the charged particles and radiation that originate in the Sun. This shield is produced by the geodynamo, the rapid motion of huge quantities of liquid iron alloy in the Earth's outer core. To maintain this magnetic field until the present day, the classical model required the Earth's core to have cooled by around 3,000C over the past 4.3 billion years. Now, a team of researchers from CNRS and Universite Blaise Pascal1 suggests that, on the co ... (source: - more...)

30/03/2016 - The Russian Federal Space Agency (Roscosmos) has launched the Progress MS-2/63P resupply mission to the International Space Station on Thursday at 12:23:58 EDT (16:23:58 UTC). The mission is the first of three Russian resupply efforts to the Space Station this year and the second immediate resupply mission to the ISS in the last nine days following the Orbital ATK Cygnus launch. (source: - more...)

29/03/2016 - China conducted its third successful orbital launch of the year on Tuesday, orbiting another navigation satellite. The Beidou-22 (or Beidou-2 I6) satellite was launched by a Long March-3A rocket from the Xichang Satellite Launch Center. Liftoff was confirmed – several hours after the event – as occurring at 20:11 UTC. (source: - more...)

29/03/2016 - Objects in space will soon be monitored by a radar array for the U.S. Air Force's Space Fence as part of Lockheed Martin's (NYSE: LMT) new test site representative of the larger system under construction on the remote Kwajalein Island. The test facility will be used for early validation of hardware, firmware and software that will enable the Space Fence to detect, track, and catalog orbital objects more than 1.5 million times a day to predict and prevent space-based collisions. The test site ... (source: - more...)

28/03/2016 - Japan’s ASTRO-H X-ray astronomy satellite is in trouble, just weeks after launch. Following a loss of nominal communication, observers have noted the spacecraft is tumbling, while tracking information has cataloged pieces of debris in the area of the satellite. The spacecraft is a high-energy astronomy mission led by the Japan Aerospace Exploration Agency (JAXA). (source: - more...)

25/03/2016 - Orbital ATK’s Cygnus resupply ship has berthing at the International Space Station (ISS) on Saturday morning. Cygnus launched to orbit on its second ride on the United Launch Alliance Atlas V and enjoyed a nominal deployment from the rocket – although ULA is investigating why the Centaur upper stage had to modify its burn time to push Cygnus into her desired orbit. (source: - more...)

24/03/2016 - Russia launched its Soyuz 2-1A rocket on Thursday, successfully deploying a second Bars-M reconnaissance satellite. The launch from Site 43/4 at the Plesetsk Cosmodrome, located in the north of the country, occurred at 12:42 Moscow Time (09:42 UTC). (source: - more...)

23/03/2016 - When NASA s Asteroid Redirect Mission (ARM) launches next decade, the flight will not only be tasked with bringing a piece of an asteroid to lunar orbit, but also with testing vital planetary defense options that could enable the deflection of a collision-hazardous asteroid away from Earth. (source: - more...)

22/03/2016 - Beginning its sixth flight Tuesday night, Orbital ATK’s Cygnus spacecraft lifted off atop an Atlas rocket to begin a two-month mission to the International Space Station. Liftoff of the OA-6 mission from SLC-41 at Cape Canaveral was on schedule at 23:05:51 local time (03:05 UTC on Wednesday), with berthing expected on Saturday. (source: - more...)

21/03/2016 - SpaceX’s rocket stages are deep into their test and processing flows, ahead of two missions currently set to take place in April. Both missions are at opposite ends of their test flows at SpaceX’s test site in McGregor, Texas – with CRS-8 hardware set to depart for Florida while the Falcon 9 first stage tasked with the launch of JSCAT-14 prepares for a test firing. (source: - more...)

18/03/2016 - A Russian Soyuz TMA-20M spacecraft launched three new crewmembers en route to the International Space Station (ISS) on Friday. Launch occurred from pad No. 1 at the Baikonur Cosmodrome in Kazakhstan at 21:26 UTC (17:26 Eastern) followed by docking with the ISS six hours later at 03:09 UTC on 19 March (Eastern on 18 March). (source: - more...)

18/03/2016 - Ceres is the largest body in the asteroid belt between Mars and Jupiter and the only such object classed as a dwarf planet. NASA's Dawn spacecraft has been in orbit around Ceres for more than a year and has mapped its surface in great detail. One of the biggest surprises has been the discovery of very bright spots, which reflect far more light than their much darker surroundings. The most prominent of these spots lie inside the crater Occator and suggest that Ceres may be a much more active world ... (source: - more...)

16/03/2016 - NASA has completed a review of its upcoming, first-of-its-kind Asteroid Redirect Mission (ARM) flight. ARM, scheduled to launch in 2021, will see the agency attempt to retrieve a… (source: - more...)

15/03/2016 - NASA teams are continuing to evaluate the root cause of the water leak that resulted in the termination of EVA-35. Suspicion is currently falling on an element of the sublimator in the EMU 3011 suit, which may have become contaminated during storage aboard the International Space Station (ISS). This suit will be returned to Earth at the conclusion of the next SpaceX Dragon mission. (source: - more...)

15/03/2016 - Airbus Defence and Space, the world number two in space technologies, has designed and built the two heat shields which will enable the Schiaparelli capsule of the ExoMars 2016 mission to withstand its descent through the Martian atmosphere and land on the Red Planet later this year. The lander module was launched on 14 March from the Baikonur cosmodrome in Kazakhstan along with a Trace Gas Orbiter that will look for trace gases while in orbit around Mars. "After building the heat shield for ... (source: - more...)

13/03/2016 - Europe’s ExoMars orbiter will begin its journey to the Red Planet on Monday with its launch from the Baikonur Cosmodrome atop a Russian Proton-M rocket. The first of two ExoMars missions, launch is scheduled for 15:31 local time (09:31 UTC) ahead of seventh month journey to Mars. (source: - more...)

12/03/2016 - A Russian Soyuz-2-1b rocket suffered a rare pad abort during a launch attempt with the latest Resurs-P (No.3) remote sensing satellite for Roskosmos on Saturday. A realigned launch attempt took place on Sunday at Site 31/6 at the Baikonur Cosmodrome, with liftoff successfully occurring at 18:56 UTC. (source: - more...)

11/03/2016 - As NASA and its contracted partner agencies press forward toward the debut launch of the Space Launch System (SLS) rocket in 2018, the U.S. space agency is beginning… (source: - more...)

Visual SAT-Flare Tracker 3D - Online

Thank you for using Visual SAT-Flare Tracker Online
In this page you can track satellites in real time, predict passes and flares.
(the 3D desktop version is still available for download)

This page is interactive so you can change the time by means of the following keys:

[s] Increase time by 1 second
[S] Decrease time by 1 second
[m] Increase time by 1 minute
[M] Decrease time by 1 minute
[h] Increase time by 1 hour
[H] Decrease time by 1 hour
[d] Increase time by 1 day
[D] Decrease time by 1 day
[0] Real time (reset time changes)
More options and commands are available through the ADVANCED button.

Earth Map Legend

Red Line Satellite's Orbit projected on the ground
Blue Line Ground Flare Track (it represents the location where the reflection hits the ground, which is where the flare brightness reaches its maximum.
Green Line Reflected ray that hits the ground generating the flare.
Black Line Shadow ground track (it represents the location where the satellite can be seen crossing either the Sun disk or the Moon disk)

Full Screen

Photo credit: Oleg Artemyev


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