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CALSPHERE 1, 900

Orbit data source: Space-Track

CALSPHERE 1, 900 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/900?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/900?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

900, 1964-063C

Orbit

LEO

Country

Related business

United States Navy (US)

Manufacturer

NRL

Mission

Operational spacecraft

Bus & Motor

NRL 14", Unknown motor

Mass

1 kg wet, 1 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

Unknown

Radar Cross Section

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 7 hours ago

TLE from 7 hours ago

0 CALSPHERE 1
1 00900U 64063C   26037.55600398  .00000748  00000-0  75436-3 0  9999
2 00900  90.2161  68.7434 0024089 331.9075 158.4316 13.76456197 53457

Epoch: 2026-02-06T13:20Z

TLE epoch observation values (Epoch: 2026-02-06T13:20:38.743Z)

Latitude

49.65362°

Longitude

-87.85713°

Altitude

1,000.927 km

Speed

7.348 km/s

True Right ascension

16h 35m 59s

True Declination

49° 29' 22"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

22:40:38

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

991.204 km

Perigee altitude

955.785 km

Semi-major axis

7,351.631 km

Eccentricity

0.00241

Inclination

90.2161°

RAAN

68.7434°

Arg. of periapsis

331.9075°

True anomaly

158.53279°

Mean anomaly

158.4316°

Eccentric anomaly

158.48222°

Mean motion

3.44324 °/min

Orbital period

104.55 mins

BSTAR

0.00075436

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

THOR ABLESTAR R/B, 893

OPS 5798 DEB, 901

OPS 5798 (TRANSIT 5B-4), 897

CALSPHERE 2, 902

OPS 5798 DEB, 903

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CALSPHERE 1 Visibility forecast

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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.
7 mins	2026-02-07 01:04:10.136Z	114.217° SE	2026-02-07 01:08:10.136Z	68.59° E	19.605°	2026-02-07 01:11:10.136Z	35.176° NE
10 mins	2026-02-07 02:47:10.136Z	197.322° SSW	2026-02-07 02:52:10.136Z	289.272° WNW	39.147°	2026-02-07 02:57:10.136Z	347.405° N
10 mins	2026-02-07 13:44:10.136Z	19.116° NNE	2026-02-07 13:49:10.136Z	92.081° ESE	35.833°	2026-02-07 13:54:10.136Z	157.392° SSE
8 mins	2026-02-07 15:29:10.136Z	330.934° NNW	2026-02-07 15:33:10.136Z	283.131° WNW	23.692°	2026-02-07 15:37:10.136Z	236.761° WSW

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Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out CALSPHERE 1, 900 on other resources

View CALSPHERE 1, 900 on NASA - NSSDCA Website

View CALSPHERE 1, 900 on Heavens-Above

View CALSPHERE 1, 900 on Keep Track

View CALSPHERE 1, 900 on Celestrak

View CALSPHERE 1, 900 on Gunter's Space Page

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

CALSPHERE 1, 900

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 7 hours ago

TLE from 7 hours ago

TLE epoch observation values (Epoch: 2026-02-06T13:20:38.743Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

CALSPHERE 1 Visibility forecast

Co-orbital & Co-planar RSOs

Check out CALSPHERE 1, 900 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 7 hours ago