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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 embed code

<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

Last TLE update

9 hours ago

Origin

United States Navy (US)

Manufacturer

NRL

Mission

Operational Defense Calibration

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

Sphere, 0.36 m

Radar Cross Section

0.102 m², Small (<0.1 m²)

Expand to show TLE details & history

TLE from 9 hours ago

0 CALSPHERE 1
1 00900U 64063C   25191.62623264  .00000457  00000-0  45967-3 0  9997
2 00900  90.2147  63.9264 0023027 246.2573 174.3419 13.76109085 24440

Epoch: 2025-07-10T15:01Z

TLE epoch observation values (Epoch: 2025-07-10T15:01:46.5Z)

Latitude

60.71429°

Longitude

-90.688°

Altitude

1,005.026 km

Speed

7.346 km/s

True Right ascension

04h 14m 10s

True Declination

60° 34' 20"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

82.94864°

Longitude

91.42824°

Altitude

1,005.769 km

Speed

7.348 km/s

Apparent Right ascension

23h 31m 15s

Apparent Declination

35° 24' 01"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

12:12:06

Azimuth

8.57° NNE

Elevation

-14.098°

Doppler factor

Orbital elements

Apogee altitude

991.663 km

Perigee altitude

957.8 km

Semi-major axis

7,352.869 km

Eccentricity

0.0023

Inclination

90.2147°

RAAN

63.9264°

Arg. of periapsis

246.2573°

True anomaly

Unknown

Mean anomaly

174.3419°

Eccentric anomaly

Unknown

Mean motion

3.44237 °/min

Orbital period

104.58 mins

BSTAR

0.00045967

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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

OPS 5798 DEB, 901

CALSPHERE 2, 902

OPS 5798 DEB, 903

CALSPHERE 1 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.
12 mins	2025-07-11 03:31:57.518Z	9.917° NNE	2025-07-11 03:37:57.518Z	90.353° ESE	41.144°	2025-07-11 03:43:57.518Z	169.877° S
7 mins	2025-07-11 05:18:57.518Z	319.437° NNW	2025-07-11 05:21:57.518Z	285.047° WNW	18.576°	2025-07-11 05:25:57.518Z	243.952° WSW
10 mins	2025-07-11 15:16:57.518Z	149.353° SSE	2025-07-11 15:21:57.518Z	77.274° E	36.593°	2025-07-11 15:26:57.518Z	11.794° NNE
8 mins	2025-07-11 17:02:57.518Z	234.991° WSW	2025-07-11 17:06:57.518Z	284.902° WNW	22.61°	2025-07-11 17:10:57.518Z	328.128° NNW

Authenticating...

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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.