Showing default

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.

Loading next visibility...

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

Optional Secondary NORAD IDs

Max 10 NORAD IDs; Separated by commas

Initial load time (optional)

ISO8601 Format

TLE date request (optional)

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: 8 hours ago

TLE from 8 hours ago

0 CALSPHERE 1
1 00900U 64063C   26038.28341145  .00000737  00000-0  74313-3 0  9993
2 00900  90.2161  68.7599 0024043 329.5928 163.0280 13.76457203 53551

Epoch: 2026-02-07T06:48Z

TLE epoch observation values (Epoch: 2026-02-07T06:48:06.749Z)

Latitude

47.39111°

Longitude

9.55634°

Altitude

1,000.833 km

Speed

7.347 km/s

True Right ascension

16h 35m 58s

True Declination

47° 13' 31"

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

16:49:36

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

991.166 km

Perigee altitude

955.815 km

Semi-major axis

7,351.628 km

Eccentricity

0.0024

Inclination

90.2161°

RAAN

68.7599°

Arg. of periapsis

329.5928°

True anomaly

163.10819°

Mean anomaly

163.028°

Eccentric anomaly

163.06812°

Mean motion

3.44324 °/min

Orbital period

104.55 mins

BSTAR

0.00074313

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

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

CALSPHERE 2, 902

OPS 5798 DEB, 903

THOR ABLESTAR R/B, 893

OPS 5798 DEB, 901

OPS 5798 (TRANSIT 5B-4), 897

Did you know?

You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

Click here to try in Sandbox

CALSPHERE 1 Visibility forecast

Loading observer location...
Set Observer location

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.
9 mins	2026-02-07 15:28:08.944Z	337.559° N	2026-02-07 15:33:08.944Z	283.439° WNW	23.694°	2026-02-07 15:37:08.944Z	236.904° WSW
9 mins	2026-02-08 01:29:08.944Z	132.893° SE	2026-02-08 01:33:08.944Z	73.708° E	30.362°	2026-02-08 01:38:08.944Z	16.023° NNE
9 mins	2026-02-08 03:13:08.944Z	220.86° SW	2026-02-08 03:17:08.944Z	272.697° WNW	27.915°	2026-02-08 03:22:08.944Z	334.602° NNW
11 mins	2026-02-08 14:09:08.944Z	5.426° NNE	2026-02-08 14:14:08.944Z	47.595° ENE	44.158°	2026-02-08 14:20:08.944Z	179.298° S

Items per page:

1–4 of 4 items

of 1 page

Co-orbital & Co-planar RSOs

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

Please sign-in to view Co-orbital & Co-planar RSOs.

Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

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

Authenticating...

Click to sort rows by Secondary header in ascending order	Click to sort rows by Secondary name header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Owner header in ascending order	Click to sort rows by Obj. Type header in ascending order	Click to sort rows by Miss dist. header in ascending order	Click to sort rows by Rel. speed header in ascending order	Click to sort rows by Apr. angle header in ascending order	Click to sort rows by TCA header in descending order

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: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-02-07T06:48:06.749Z)

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: 8 hours ago