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EXPLORER 29 (GEOS 1), 1726

Orbit data source: Space-Track

EXPLORER 29 (GEOS 1), 1726 is a payload satellite owned by GSFC (US) in LEO that was launched on Sat, 06 Nov 1965 UTC via a THOR DELTA E launch vehicle from the Air Force Eastern Test Range (AFETR). 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 URL

https://www.satcat.com/sats-embedded/1726?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

1726, 1965-089A

Orbit

LEO

Last TLE update

14 hours ago

Origin

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

APL

Mission

Civil Geodetic

Bus & Motor

ANNA, Unknown motor

Mass

176 kg wet, 176 kg dry

Launch date (UTC)

1965-11-06 (60 years ago)

Launch vehicle

THOR DELTA E

Launch site

Air Force Eastern Test Range (AFETR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Oct Cyl + 1 Dome + 1 Rod, 7.5 m

Radar Cross Section

1.519 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 14 hours ago

0 EXPLORER 29 (GEOS 1)
1 01726U 65089A   25199.35437340 -.00000089  00000-0 -89537-4 0  9994
2 01726  59.3811  59.5472 0715701   3.2006 166.6804 11.97072665609694

Epoch: 2025-07-18T08:30Z

TLE epoch observation values (Epoch: 2025-07-18T08:30:17.861Z)

Latitude

7.16517°

Longitude

171.31785°

Altitude

2,258.864 km

Speed

6.554 km/s

True Right ascension

15h 41m 11s

True Declination

7° 07' 48"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-45.01206°

Longitude

-149.67197°

Altitude

2,043.698 km

Speed

6.737 km/s

Apparent Right ascension

20h 41m 09s

Apparent Declination

-50° 29' 37"

Sunlit

Object is in full shadow

Visualization observer readout

Local Sidereal Time

11:43:43

Azimuth

123.964° SE

Elevation

-56.742°

Doppler factor

Orbital elements

Apogee altitude

2,271.069 km

Perigee altitude

1,115.709 km

Semi-major axis

8,071.526 km

Eccentricity

0.07157

Inclination

59.3811°

RAAN

59.5472°

Arg. of periapsis

3.2006°

True anomaly

168.41784°

Mean anomaly

166.6804°

Eccentric anomaly

167.56351°

Mean motion

2.99302 °/min

Orbital period

120.28 mins

BSTAR

-0.000089537

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Other satellites on launch #89 in the year 1965 (1965-11-06 UTC)

EXPLORER 29 (GEOS 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.
22 mins	2025-07-19 00:05:12.019Z	323.382° NNW	2025-07-19 00:15:12.019Z	43.787° NE	41.587°	2025-07-19 00:27:12.019Z	123.31° SE
20 mins	2025-07-19 02:12:12.019Z	306.06° NW	2025-07-19 02:21:12.019Z	236.794° WSW	36.498°	2025-07-19 02:32:12.019Z	174.731° S
12 mins	2025-07-19 15:45:12.019Z	177.894° S	2025-07-19 15:50:12.019Z	117.952° SE	32.843°	2025-07-19 15:57:12.019Z	52.519° ENE
14 mins	2025-07-19 17:49:12.019Z	251.761° W	2025-07-19 17:55:12.019Z	324.639° NNW	36.983°	2025-07-19 18:03:12.019Z	34.697° NE
12 mins	2025-07-19 19:58:12.019Z	311.648° NW	2025-07-19 20:03:12.019Z	355.038° N	21.994°	2025-07-19 20:10:12.019Z	41.374° NE
16 mins	2025-07-19 22:05:12.019Z	330.354° NNW	2025-07-19 22:12:12.019Z	25.56° NE	26.836°	2025-07-19 22:21:12.019Z	79.468° E

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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Check out EXPLORER 29 (GEOS 1), 1726 on other resources

View EXPLORER 29 (GEOS 1), 1726 on NASA - NSSDCA Website

View EXPLORER 29 (GEOS 1), 1726 on Heavens-Above

View EXPLORER 29 (GEOS 1), 1726 on Keep Track

View EXPLORER 29 (GEOS 1), 1726 on Celestrak

View EXPLORER 29 (GEOS 1), 1726 on Gunter's Space Page

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