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ESSA 4 (TOS-B), 2657

Orbit data source: Space-Track

ESSA 4 (TOS-B), 2657 is a payload satellite owned by ESSA (US) in SSO that was launched on Thu, 26 Jan 1967 UTC via a THOR DELTA E launch vehicle from the Air Force Western Test Range (AFWTR). 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/2657?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/2657?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

2657, 1967-006A

Orbit

SSO

Last TLE update

18 hours ago

Origin

National Oceanic and Atmospheric Administration (US)

Manufacturer

RCA/East Windsor

Mission

Non-operational Civil Weather

Bus & Motor

TIROS I, Unknown motor

Mass

132 kg wet, 132 kg dry

Launch date (UTC)

1967-01-26 (58 years ago)

Launch vehicle

THOR DELTA E

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Cyl, 1.1 m

Radar Cross Section

0.994 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 18 hours ago

0 ESSA 4 (TOS-B)
1 02657U 67006A   25128.49365015 -.00000025  00000-0  12094-3 0  9997
2 02657 102.0816 302.0465 0072920 352.3200  76.1963 12.69882843701174

Epoch: 2025-05-08T11:50Z

Definitive object data (Epoch: 2025-05-08T11:50:51.372Z)

Latitude

66.27551°

Longitude

-131.21898°

Altitude

1,380.579 km

Speed

7.181 km/s

True Right ascension

18h 12m 14s

True Declination

66° 09' 32"

Sunlit

Object was in daylight at TLE epoch

Visualization TLE readout

Latitude

15.48949°

Longitude

81.91829°

Altitude

1,440.531 km

Speed

7.117 km/s

Apparent Right ascension

05h 57m 58s

Apparent Declination

-14° 02' 48"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

13:30:37

Azimuth

273.763° WNW

Elevation

-26.64°

Doppler factor

Orbital elements

Apogee altitude

1,436.53 km

Perigee altitude

1,323.386 km

Semi-major axis

7,758.095 km

Eccentricity

0.007292

Inclination

102.0816°

RAAN

302.0465°

Arg. of periapsis

352.32°

True anomaly

77.00951°

Mean anomaly

76.1963°

Eccentric anomaly

76.60273°

Mean motion

3.17622 °/min

BSTAR

0.00012094

Orbital period

113.34 mins

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Other satellites on launch #6 in the year 1967 (1967-01-26 UTC)

ESSA 4 (TOS-B) 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.
13 mins	2025-05-09 10:17:57.593Z	127.098° SE	2025-05-09 10:24:57.593Z	56.669° ENE	33.674°	2025-05-09 10:30:57.593Z	358.092° N
13 mins	2025-05-09 12:09:57.593Z	195.356° SSW	2025-05-09 12:15:57.593Z	259.951° W	33.618°	2025-05-09 12:22:57.593Z	327.519° NNW
14 mins	2025-05-10 00:02:57.593Z	30.826° NE	2025-05-10 00:08:57.593Z	102.815° ESE	40.053°	2025-05-10 00:16:57.593Z	181.193° SSW
12 mins	2025-05-10 01:53:57.593Z	356.628° N	2025-05-10 01:59:57.593Z	300.122° NW	29.033°	2025-05-10 02:05:57.593Z	245.723° WSW

Authenticating...

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Check out ESSA 4 (TOS-B), 2657 on other resources

View ESSA 4 (TOS-B), 2657 on NASA - NSSDCA Website

View ESSA 4 (TOS-B), 2657 on Heavens-Above

View ESSA 4 (TOS-B), 2657 on Keep Track

View ESSA 4 (TOS-B), 2657 on Celestrak

View ESSA 4 (TOS-B), 2657 on Gunter's Space Page

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