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IRIDIUM 42, 25077

Orbit data source: Space-Track

IRIDIUM 42, 25077 is a payload satellite owned by Iridium (US) in LEO that was launched on Mon, 08 Dec 1997 UTC via a CHANG ZHENG 2C-III/SD launch vehicle from the Taiyaun Space Center, China (TSC). 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/25077?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/25077?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

25077, 1997-077A

Orbit

LEO

Last TLE update

10 hours ago

Origin

Iridium Communications Inc. (US)

Manufacturer

Motorola

Mission

Non-operational Commercial Communications

Bus & Motor

LM700, Unknown motor

Mass

662 kg wet, 556 kg dry

Launch date (UTC)

1997-12-08 (28 years ago)

Launch vehicle

CHANG ZHENG 2C-III/SD

Launch site

Taiyaun Space Center, China (TSC)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 2 Pan, 4.2 m

Radar Cross Section

5.666 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 10 hours ago

0 IRIDIUM 42
1 25077U 97077A   25200.77804533  .00000285  00000-0  90742-4 0  9998
2 25077  86.3946 225.6549 0002536  73.1100 287.0375 14.36370130445878

Epoch: 2025-07-19T18:40Z

TLE epoch observation values (Epoch: 2025-07-19T18:40:23.116Z)

Latitude

-0.00002°

Longitude

7.74831°

Altitude

773.04 km

Speed

7.468 km/s

True Right ascension

15h 02m 37s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

47.48211°

Longitude

11.48847°

Altitude

776.332 km

Speed

7.471 km/s

Apparent Right ascension

10h 28m 54s

Apparent Declination

20° 35' 40"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

17:47:56

Azimuth

298.223° NW

Elevation

-0.973°

Doppler factor

Orbital elements

Apogee altitude

769.29 km

Perigee altitude

765.666 km

Semi-major axis

7,145.615 km

Eccentricity

0.00025

Inclination

86.3946°

RAAN

225.6549°

Arg. of periapsis

73.11°

True anomaly

287.00971°

Mean anomaly

287.0375°

Eccentric anomaly

287.02361°

Mean motion

3.59322 °/min

Orbital period

100.19 mins

BSTAR

0.000090742

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Other satellites on launch #77 in the year 1997 (1997-12-08 UTC)

IRIDIUM 44, 25078

CZ-2C R/B, 25079 (Decayed)

CZ-2C DEB (DISPENSER), 25080 (Decayed)

CZ-2C DEB, 25081 (Decayed)

CZ-2C DEB, 25082 (Decayed)

CZ-2C DEB, 25083 (Decayed)

CZ-2C DEB, 25084 (Decayed)

IRIDIUM 42 Visibility forecast

Observer location: undefined°, undefined°

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.
9 mins	2025-07-20 13:38:29.021Z	4.221° NNE	2025-07-20 13:42:29.021Z	61.565° ENE	42.561°	2025-07-20 13:47:29.021Z	169.123° S
8 mins	2025-07-21 02:34:29.021Z	204.433° SW	2025-07-21 02:37:29.021Z	270.572° WNW	39.708°	2025-07-21 02:42:29.021Z	353.368° N

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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Authenticating...

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Check out IRIDIUM 42, 25077 on other resources

View IRIDIUM 42, 25077 on NASA - NSSDCA Website

View IRIDIUM 42, 25077 on Heavens-Above

View IRIDIUM 42, 25077 on Keep Track

View IRIDIUM 42, 25077 on Celestrak

View IRIDIUM 42, 25077 on Gunter's Space Page

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