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CALSPHERE 2, 902

Orbit data source: Space-Track

CALSPHERE 2, 902 is a payload satellite owned by NRL (US) in LEO that was launched on Tue, 06 Oct 1964 UTC via a THOR ABLESTAR 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/902?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/902?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

902, 1964-063E

Orbit

LEO

Last TLE update

12 hours ago

Origin

United States Navy (US)

Manufacturer

NRL

Mission

Operational Defense Calibration

Bus & Motor

NRL 14", Unknown motor

Mass

10 kg wet, 10 kg dry

Launch date (UTC)

1964-10-06 (61 years ago)

Launch vehicle

THOR ABLESTAR

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Sphere, 0.36 m

Radar Cross Section

0.102 m², Small (<0.1 m²)

Expand to show TLE details & history

TLE from 12 hours ago

0 CALSPHERE 2
1   902U 64063E   25128.83677044  .00000058  00000-0  74797-4 0  9998
2   902  90.2316  66.3166 0017405 326.9835  91.8801 13.52860962802048

Epoch: 2025-05-08T20:04Z

Definitive object data (Epoch: 2025-05-08T20:04:56.966Z)

Latitude

59.15309°

Longitude

-102.20811°

Altitude

1,072.303 km

Speed

7.321 km/s

True Right ascension

04h 23m 43s

True Declination

59° 00' 28"

Sunlit

Object was in daylight at TLE epoch

Visualization TLE readout

Latitude

-52.05676°

Longitude

-101.51517°

Altitude

1,069.667 km

Speed

7.322 km/s

Apparent Right ascension

04h 16m 20s

Apparent Declination

-46° 18' 34"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

16:06:50

Azimuth

194.378° SSW

Elevation

-83.376°

Doppler factor

Orbital elements

Apogee altitude

1,071.741 km

Perigee altitude

1,045.853 km

Semi-major axis

7,436.934 km

Eccentricity

0.0017405

Inclination

90.2316°

RAAN

66.3166°

Arg. of periapsis

326.9835°

True anomaly

92.07942°

Mean anomaly

91.8801°

Eccentric anomaly

91.97976°

Mean motion

3.38417 °/min

BSTAR

0.000074797

Orbital period

106.38 mins

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Other satellites on launch #63 in the year 1964 (1964-10-06 UTC)

THOR ABLESTAR R/B, 893

OPS 5798 (TRANSIT 5B-4), 897

CALSPHERE 1, 900

OPS 5798 DEB, 901

OPS 5798 DEB, 903

CALSPHERE 2 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.
11 mins	2025-05-09 08:48:45.226Z	348.337° N	2025-05-09 08:54:45.226Z	266.481° W	36.051°	2025-05-09 08:59:45.226Z	210.672° SW
9 mins	2025-05-09 19:00:45.226Z	119.312° SE	2025-05-09 19:04:45.226Z	71.001° E	24.319°	2025-05-09 19:09:45.226Z	21.084° NNE
10 mins	2025-05-09 20:45:45.226Z	205.767° SW	2025-05-09 20:50:45.226Z	283.866° WNW	36.146°	2025-05-09 20:55:45.226Z	342.851° N
4 mins	2025-05-10 07:53:45.226Z	8.597° NNE	2025-05-10 07:57:45.226Z	31.77° NE	39.891°	2025-05-10 07:57:45.226Z	31.77° NE

Authenticating...

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Check out CALSPHERE 2, 902 on other resources

View CALSPHERE 2, 902 on NASA - NSSDCA Website

View CALSPHERE 2, 902 on Heavens-Above

View CALSPHERE 2, 902 on Keep Track

View CALSPHERE 2, 902 on Celestrak

View CALSPHERE 2, 902 on Gunter's Space Page

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