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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

1 day 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 1 day ago

0 ESSA 4 (TOS-B)
1 02657U 67006A   25185.44963830 -.00000026  00000-0  11990-3 0  9999
2 02657 102.0849   1.7794 0072767 240.3801 175.4629 12.69883993708402

Epoch: 2025-07-04T10:47Z

TLE epoch observation values (Epoch: 2025-07-04T10:47:28.749Z)

Latitude

54.17039°

Longitude

-99.95489°

Altitude

1,447.418 km

Speed

7.117 km/s

True Right ascension

22h 58m 28s

True Declination

54° 01' 17"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

62.22326°

Longitude

-105.32755°

Altitude

1,448.968 km

Speed

7.117 km/s

Apparent Right ascension

19h 18m 59s

Apparent Declination

23° 50' 14"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

05:00:43

Azimuth

326.807° NNW

Elevation

-18.565°

Doppler factor

Orbital elements

Apogee altitude

1,436.407 km

Perigee altitude

1,323.5 km

Semi-major axis

7,758.09 km

Eccentricity

0.00728

Inclination

102.0849°

RAAN

1.7794°

Arg. of periapsis

240.3801°

True anomaly

Unknown

Mean anomaly

175.4629°

Eccentric anomaly

Unknown

Mean motion

3.17622 °/min

Orbital period

113.34 mins

BSTAR

0.0001199

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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.
10 mins	2025-07-05 23:05:25.066Z	51.345° ENE	2025-07-05 23:10:25.066Z	90.509° ESE	17.425°	2025-07-05 23:15:25.066Z	131.142° SE
14 mins	2025-07-06 00:56:25.066Z	16.483° NNE	2025-07-06 01:02:25.066Z	342.627° N	44.757°	2025-07-06 01:10:25.066Z	202.566° SW
8 mins	2025-07-06 02:49:25.066Z	339.291° N	2025-07-06 02:52:25.066Z	313.739° NW	18.613°	2025-07-06 02:57:25.066Z	271.813° WNW
11 mins	2025-07-06 09:56:25.066Z	99.885° ESE	2025-07-06 10:01:25.066Z	55.661° ENE	24.092°	2025-07-06 10:07:25.066Z	5.333° NNE
14 mins	2025-07-06 11:45:25.066Z	170.106° S	2025-07-06 11:52:25.066Z	277.709° WNW	43.686°	2025-07-06 11:59:25.066Z	337.941° N
5 mins	2025-07-06 13:42:25.066Z	255.257° W	2025-07-06 13:44:25.066Z	270.403° WNW	12.553°	2025-07-06 13:47:25.066Z	292.674° NW

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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.