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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

4 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 4 hours ago

0 ESSA 4 (TOS-B)
1  2657U 67006A   25163.46284611 -.00000049  00000-0  53678-5 0  9996
2  2657 102.0832 338.7192 0072705 283.6252 100.8618 12.69883587706059

Epoch: 2025-06-12T11:06Z

TLE epoch observation values (Epoch: 2025-06-12T11:06:29.903Z)

Latitude

24.73285°

Longitude

-94.56721°

Altitude

1,396.144 km

Speed

7.159 km/s

True Right ascension

22h 12m 21s

True Declination

24° 36' 47"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

59.88182°

Longitude

112.79463°

Altitude

1,446.974 km

Speed

7.119 km/s

Apparent Right ascension

13h 00m 22s

Apparent Declination

17° 16' 11"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

01:47:14

Azimuth

13.186° NNE

Elevation

-31.78°

Doppler factor

Orbital elements

Apogee altitude

1,436.36 km

Perigee altitude

1,323.55 km

Semi-major axis

7,758.092 km

Eccentricity

0.00727

Inclination

102.0832°

RAAN

338.7192°

Arg. of periapsis

283.6252°

True anomaly

Unknown

Mean anomaly

100.8618°

Eccentric anomaly

Unknown

Mean motion

3.17622 °/min

Orbital period

113.34 mins

BSTAR

0.0000053678

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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	2025-06-12 22:59:53.482Z	54.345° ENE	2025-06-12 23:04:53.482Z	94.584° ESE	17.883°	2025-06-12 23:09:53.482Z	133.479° SE
15 mins	2025-06-13 00:49:53.482Z	16.617° NNE	2025-06-13 00:56:53.482Z	262.61° W	44.9°	2025-06-13 01:04:53.482Z	202.467° SSW
9 mins	2025-06-13 02:42:53.482Z	342.702° N	2025-06-13 02:46:53.482Z	309.132° NW	19.168°	2025-06-13 02:51:53.482Z	269.095° W
10 mins	2025-06-13 09:50:53.482Z	96.802° ESE	2025-06-13 09:55:53.482Z	49.784° ENE	23.671°	2025-06-13 10:00:53.482Z	7.691° NNE
14 mins	2025-06-13 11:39:53.482Z	170.658° S	2025-06-13 11:45:53.482Z	248.722° W	43.893°	2025-06-13 11:53:53.482Z	338.638° N
4 mins	2025-06-13 13:36:53.482Z	258.85° W	2025-06-13 13:38:53.482Z	274.297° WNW	12.197°	2025-06-13 13:40:53.482Z	289.331° WNW

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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.