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EOS-4, 51656

Orbit data source: Space-Track

EOS-4, 51656 is a payload satellite owned by ISRO (IN) in SSO that was launched on Mon, 14 Feb 2022 UTC via a PSLV-XL launch vehicle from the Sirharikota (SRI). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.

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<iframe src="https://www.satcat.com/sats-embedded/51656?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/51656?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

51656, 2022-013A

Orbit

SSO

Country

IN / IND

Related business

Indian Space Research Organization (IN)

Manufacturer

ISAC/HAL

Mission

Operational Civil Radar Imaging

Bus & Motor

IRS, Unknown motor

Mass

1,710 kg wet, 1,650 kg dry

Launch date (UTC)

2022-02-14 (4 years ago)

Launch vehicle

PSLV-XL

Launch site

Sirharikota (SRI)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + Hex Box + 3 Pan, 5.8 m

Radar Cross Section

17.625 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 9 hours ago

TLE from 9 hours ago

0 EOS-4
1 51656U 22013A   26173.06012834  .00001750  00000-0  10361-3 0  9991
2 51656  97.5114 179.6353 0001855  96.0901 264.0542 15.12721078240227

Epoch: 2026-06-22T01:26Z

TLE epoch observation values (Epoch: 2026-06-22T01:26:35.088Z)

Latitude

0.00004°

Longitude

-112.26238°

Altitude

531.116 km

Speed

7.597 km/s

True Right ascension

11h 58m 32s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

21:27:44

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

526.166 km

Perigee altitude

523.605 km

Semi-major axis

6,903.023 km

Eccentricity

0.00019

Inclination

97.5114°

RAAN

179.6353°

Arg. of periapsis

96.0901°

True anomaly

264.03306°

Mean anomaly

264.0542°

Eccentric anomaly

264.04363°

Mean motion

3.78429 °/min

Orbital period

95.13 mins

BSTAR

0.00010361

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Other satellites on launch #13 in the year 2022 (2022-02-14 UTC)

INSPIRESAT-1, 51657 (Decayed)

INS-2TD, 51658 (Decayed)

PSLV R/B, 51659

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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

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EOS-4 Visibility forecast

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Span	Click to sort rows by Start time (UTC) header in descending order	Start Az.	Max El. time (UTC)	Max El. Az.	Max El.	End time (UTC)	End Az.
7 mins	2026-06-22 13:06:43.791Z	19.684° NNE	2026-06-22 13:10:43.791Z	127.883° SE	40.152°	2026-06-22 13:13:43.791Z	180.376° SSW
4 mins	2026-06-22 23:49:43.791Z	109.254° ESE	2026-06-22 23:51:43.791Z	59.757° ENE	23.729°	2026-06-22 23:53:43.791Z	20.871° NNE

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Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out EOS-4, 51656 on other resources

View EOS-4, 51656 on NASA - NSSDCA Website

View EOS-4, 51656 on Heavens-Above

View EOS-4, 51656 on Keep Track

View EOS-4, 51656 on Celestrak

View EOS-4, 51656 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

EOS-4, 51656

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 9 hours ago

TLE from 9 hours ago

TLE epoch observation values (Epoch: 2026-06-22T01:26:35.088Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #13 in the year 2022 (2022-02-14 UTC)

EOS-4 Visibility forecast

Co-orbital & Co-planar RSOs

Check out EOS-4, 51656 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 9 hours ago