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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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Identifier
2657, 1967-006A
Orbit
SSO
Last TLE update
15 hours ago
Origin
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 15 hours ago
0 ESSA 4 (TOS-B)
1 02657U 67006A   25181.73717715 -.00000041  00000-0  42065-4 0  9991
2 02657 102.0847 357.8855 0072738 247.6736 123.6191 12.69883911707934
Epoch: 2025-06-30T17:41Z
TLE epoch observation values (Epoch: 2025-06-30T17:41:32.105Z)
Latitude
11.6748°
Longitude
170.93595°
Altitude
1,415.79 km
Speed
7.139 km/s
True Right ascension
23h 41m 26s
True Declination
11° 36' 45"
Sunlit
Object was in daylight at epoch
Visualization orbit readout
Latitude
-25.70167°
Longitude
179.99652°
Altitude
1,388.771 km
Speed
7.166 km/s
Apparent Right ascension
03h 09m 09s
Apparent Declination
-49° 47' 21"
Sunlit
Object is in daylight
Visualization observer readout
Local Sidereal Time
20:15:11
Azimuth
127.921° SE
Elevation
-37.268°
Doppler factor
1
Orbital elements
Apogee altitude
1,436.384 km
Perigee altitude
1,323.523 km
Semi-major axis
7,758.091 km
Eccentricity
0.00727
Inclination
102.0847°
RAAN
357.8855°
Arg. of periapsis
247.6736°
True anomaly
Unknown
Mean anomaly
123.6191°
Eccentric anomaly
Unknown
Mean motion
3.17622 °/min
Orbital period
113.34 mins
BSTAR
0.000042065
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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.
4 mins2025-07-01 09:01:02.837Z60.347° ENE2025-07-01 09:03:02.837Z45.812° ENE11.578°2025-07-01 09:05:02.837Z31.012° NE
14 mins2025-07-01 10:46:02.837Z134.559° SE2025-07-01 10:53:02.837Z57.564° ENE38.473°2025-07-01 11:00:02.837Z352.542° N
13 mins2025-07-01 12:38:02.837Z203.258° SW2025-07-01 12:44:02.837Z259.201° W29.697°2025-07-01 12:51:02.837Z322.846° NNW
14 mins2025-07-02 00:31:02.837Z24.566° NE2025-07-02 00:37:02.837Z84.033° E42.961°2025-07-02 00:45:02.837Z188.873° SSW
11 mins2025-07-02 02:23:02.837Z350.634° N2025-07-02 02:28:02.837Z305.225° NW24.688°2025-07-02 02:34:02.837Z253.429° W
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