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NOAA 4, 7529

Orbit data source: Space-Track

NOAA 4, 7529 is a payload satellite owned by NOAA (US) in SSO that was launched on Fri, 15 Nov 1974 UTC via a DELTA 2310 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/7529?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/7529?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

7529, 1974-089A

Orbit

SSO

Country

Related business

National Oceanic and Atmospheric Administration (US)

Manufacturer

RCA/East Windsor

Mission

Non-operational spacecraft

Bus & Motor

TIROS M, Unknown motor

Mass

345 kg wet, 345 kg dry

Launch date (UTC)

1974-11-15 (51 years ago)

Launch vehicle

DELTA 2310

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown

Radar Cross Section

Large (>1 m²)

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

TLE from 7 hours ago

0 NOAA 4
1  7529U 74089A   26035.52046444 -.00000045  00000-0  56691-5 0  9998
2  7529 102.0073  46.8980 0009276  90.5817  31.6697 12.53200820342900

Epoch: 2026-02-04T12:29Z

TLE epoch observation values (Epoch: 2026-02-04T12:29:28.127Z)

Latitude

55.8561°

Longitude

-76.97036°

Altitude

1,454.04 km

Speed

7.143 km/s

True Right ascension

16h 20m 19s

True Declination

55° 42' 37"

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

21:23:55

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,455.953 km

Perigee altitude

1,441.433 km

Semi-major axis

7,826.83 km

Eccentricity

0.00093

Inclination

102.0073°

RAAN

46.898°

Arg. of periapsis

90.5817°

True anomaly

31.72556°

Mean anomaly

31.6697°

Eccentric anomaly

31.69763°

Mean motion

3.13447 °/min

Orbital period

114.85 mins

BSTAR

0.0000056691

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Other satellites on launch #89 in the year 1974 (1974-11-15 UTC)

THORAD DELTA 1 DEB, 9985

THORAD DELTA 1 DEB, 8163

THORAD DELTA 1 DEB, 8167

THORAD DELTA 1 DEB, 8180

THORAD DELTA 1 DEB, 42610

THORAD DELTA 1 DEB, 42613

THORAD DELTA 1 DEB, 8142

THORAD DELTA 1 DEB, 8143

THORAD DELTA 1 DEB, 42614

THORAD DELTA 1 DEB, 8303

THORAD DELTA 1 DEB, 10393

THORAD DELTA 1 DEB, 9795

THORAD DELTA 1 DEB, 8594

THORAD DELTA 1 DEB, 42593

THORAD DELTA 1 DEB, 8405

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NOAA 4 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.
14 mins	2026-02-04 23:27:31.329Z	129.171° SE	2026-02-04 23:34:31.329Z	63.291° ENE	35.419°	2026-02-04 23:41:31.329Z	355.783° N
13 mins	2026-02-05 01:21:31.329Z	199.316° SSW	2026-02-05 01:27:31.329Z	263.403° W	33.157°	2026-02-05 01:34:31.329Z	326.68° NNW
15 mins	2026-02-05 13:22:31.329Z	23.807° NE	2026-02-05 13:29:31.329Z	103.064° ESE	43.167°	2026-02-05 13:37:31.329Z	188.717° SSW
11 mins	2026-02-05 15:16:31.329Z	350.676° N	2026-02-05 15:21:31.329Z	305.898° NW	25.02°	2026-02-05 15:27:31.329Z	254.164° W

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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 NOAA 4, 7529 on other resources

View NOAA 4, 7529 on NASA - NSSDCA Website

View NOAA 4, 7529 on Heavens-Above

View NOAA 4, 7529 on Keep Track

View NOAA 4, 7529 on Celestrak

View NOAA 4, 7529 on Gunter's Space Page

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

NOAA 4, 7529

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: 2026-02-04T12:29:28.127Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #89 in the year 1974 (1974-11-15 UTC)

NOAA 4 Visibility forecast

Co-orbital & Co-planar RSOs

Check out NOAA 4, 7529 on other resources

Documentation

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