Showing default

LANDSAT 1 (ERTS 1), 6126

Orbit data source: Space-Track

LANDSAT 1 (ERTS 1), 6126 is a payload satellite owned by GSFC (US) in SSO that was launched on Sun, 23 Jul 1972 UTC via a DELTA 0900 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/6126?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/6126?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

6126, 1972-058A

Orbit

SSO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

GE/MSVD

Mission

Non-operational spacecraft

Bus & Motor

NIMBUS, Unknown motor

Mass

891 kg wet, 891 kg dry

Launch date (UTC)

1972-07-23 (54 years ago)

Launch vehicle

DELTA 0900

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

CONE + 2 PAN, 1.9 m

Radar Cross Section

Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 5 hours ago

TLE from 5 hours ago

0 LANDSAT 1 (ERTS 1)
1  6126U 72058A   26247.84160875 -.00000267  00000-0 -15583-3 0  9999
2  6126  99.3325 278.9045 0008323  42.9645 317.2165 13.97841463759089

Epoch: 2026-09-04T20:11Z

TLE epoch observation values (Epoch: 2026-09-04T20:11:54.996Z)

Latitude

-0.00009°

Longitude

-8.03428°

Altitude

899.698 km

Speed

7.405 km/s

True Right ascension

18h 35m 37s

True Declination

0° 00' 00"

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

16:58:57

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

904.555 km

Perigee altitude

892.442 km

Semi-major axis

7,276.635 km

Eccentricity

0.00083

Inclination

99.3325°

RAAN

278.9045°

Arg. of periapsis

42.9645°

True anomaly

317.15167°

Mean anomaly

317.2165°

Eccentric anomaly

317.18409°

Mean motion

3.49661 °/min

Orbital period

102.96 mins

BSTAR

-0.00015583

Loading maneuver chart data...

Computing Atmospheric mass density...

Loading historical data...

Other satellites on launch #58 in the year 1972 (1972-07-23 UTC)

DELTA 1 DEB, 7851 (Decayed)

DELTA 1 DEB, 7942 (Decayed)

DELTA 1 DEB, 7896 (Decayed)

DELTA 1 DEB, 7973 (Decayed)

DELTA 1 DEB, 8320 (Decayed)

DELTA 1 DEB, 8321 (Decayed)

DELTA 1 DEB, 8091 (Decayed)

DELTA 1 DEB, 14878 (Decayed)

DELTA 1 DEB, 9673 (Decayed)

DELTA 1 DEB, 13934 (Decayed)

DELTA 1 DEB, 7840 (Decayed)

DELTA 1 R/B, 6127

DELTA 1 DEB, 42567

DELTA 1 DEB, 8125 (Decayed)

DELTA 1 DEB, 13935 (Decayed)

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

LANDSAT 1 (ERTS 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	2026-09-05 01:28:47.715Z	136.675° SSE	2026-09-05 01:33:47.715Z	53.966° ENE	34.993°	2026-09-05 01:37:47.715Z	1.59° NNE
7 mins	2026-09-05 03:11:47.715Z	221.204° SW	2026-09-05 03:14:47.715Z	259.791° W	22.294°	2026-09-05 03:18:47.715Z	311.991° NW
7 mins	2026-09-05 13:59:47.715Z	51.576° ENE	2026-09-05 14:02:47.715Z	89.272° E	21.561°	2026-09-05 14:06:47.715Z	140.23° SSE
9 mins	2026-09-05 15:40:47.715Z	357.935° N	2026-09-05 15:44:47.715Z	297.042° NW	36.471°	2026-09-05 15:49:47.715Z	220.486° SW

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 LANDSAT 1 (ERTS 1), 6126 on other resources

View LANDSAT 1 (ERTS 1), 6126 on NASA - NSSDCA Website

View LANDSAT 1 (ERTS 1), 6126 on Heavens-Above

View LANDSAT 1 (ERTS 1), 6126 on Keep Track

View LANDSAT 1 (ERTS 1), 6126 on Celestrak

View LANDSAT 1 (ERTS 1), 6126 on Gunter's Space Page

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

LANDSAT 1 (ERTS 1), 6126

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 5 hours ago

TLE from 5 hours ago

TLE epoch observation values (Epoch: 2026-09-04T20:11:54.996Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #58 in the year 1972 (1972-07-23 UTC)

LANDSAT 1 (ERTS 1) Visibility forecast

Co-orbital & Co-planar RSOs

Check out LANDSAT 1 (ERTS 1), 6126 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 5 hours ago