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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
4 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 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
1
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 mins2025-06-12 22:59:53.482Z54.345° ENE2025-06-12 23:04:53.482Z94.584° ESE17.883°2025-06-12 23:09:53.482Z133.479° SE
15 mins2025-06-13 00:49:53.482Z16.617° NNE2025-06-13 00:56:53.482Z262.61° W44.9°2025-06-13 01:04:53.482Z202.467° SSW
9 mins2025-06-13 02:42:53.482Z342.702° N2025-06-13 02:46:53.482Z309.132° NW19.168°2025-06-13 02:51:53.482Z269.095° W
10 mins2025-06-13 09:50:53.482Z96.802° ESE2025-06-13 09:55:53.482Z49.784° ENE23.671°2025-06-13 10:00:53.482Z7.691° NNE
14 mins2025-06-13 11:39:53.482Z170.658° S2025-06-13 11:45:53.482Z248.722° W43.893°2025-06-13 11:53:53.482Z338.638° N
4 mins2025-06-13 13:36:53.482Z258.85° W2025-06-13 13:38:53.482Z274.297° WNW12.197°2025-06-13 13:40:53.482Z289.331° WNW
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