DELTA 1 R/B

Satellite information

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Satellite Type and Status

ROCKET BODYIN ORBIT

Key statistics

Satellite DELTA 1 R/B at a glance.

Uptime

18589

Days in orbit

Revolutions

≈ 14.1

Per day

Orbit

SSO

Sun Synchronous Orbit

Inclination

97.8

Latest

Satellite identification and parameters

Extended collection of information and parameters for DELTA 1 R/B.

Object identification

Identified? True

Debris? False

Object name: DELTA 1 R/B

International designator: 1975-004B

Object number (NORAD): 7616

Object ID (CCSDS): 7616

Country: UNITED STATES OF AMERICA (US)

Current information (Y/N): Y

RCS size: LARGE

Orbital parameters

Period: 102.415 minutes

Inclination: 97.7674 deg

SMA: 7251.075 km

Apoapsis: 1007.016 km

Periapsis: 738.864 km

RAAN: 62.577 deg

Eccentricy: 0.01849048

Argument of periapsis: 331.3578 deg

Mean anomaly: 27.7533 deg

Mean motion: 14.06044918 rev/day

Mean motion (dot): 0.00000116 rev/day²

B* drag term: 0.000079322815 1/R_Earth

Two-line elements (TLE)

Creation date: Dec. 12, 2025, 10:14 a.m.

Reference frame: TEME

Reference center: EARTH

Epoch: Dec. 12, 2025, 5:46 a.m. UTC

TLE line 0: 0 DELTA 1 R/B

TLE line 1: 1 07616U 75004B 25346.24037029 .00000116 00000-0 79323-4 0 9999

TLE line 2: 2 07616 97.7674 62.5770 0184905 331.3578 27.7533 14.06044918594121

Live tracking on map

Real-time ground track for satellite DELTA 1 R/B.

In-orbit conjunctions

A list of the most updated potential collisions computed for object DELTA 1 R/B.

Target	Orbit	TCA	Probability of collision	Miss distance	Type
COSMOS 886 DEB	MEO	2025-11-25 15:44:39	0.0001743008	266.0 (m)	DEBRIS
COSMOS 1275 DEB	LEO	2025-09-25 00:23:00	0.0001918237	113.0 (m)	DEBRIS
DELTA 1 DEB	SSO	2025-05-08 00:47:22	0.0006829788	272.0 (m)	DEBRIS
COSMOS 2251 DEB	LEO	2025-03-15 01:07:00	0.0001811484	105.0 (m)	DEBRIS
CZ-6A DEB	LEO	2025-01-21 04:21:35	0.0003209765	699.0 (m)	DEBRIS

Associated space launch

Earth observation satellite

DELTA 1 R/B was lifted into orbit during the mission ‘Delta 2910 | Landsat 2’, on board a Delta 2910 space rocket.

The launch took place on Jan. 22, 1975, 5:55 p.m. from Space Launch Complex 2W.

For more information about the launch, click the button.

Delta 2910 | Landsat 2

Agency: N/A

Status: Launch Successful

Launch date: Jan. 22, 1975, 5:55 p.m. UTC

Rocket: Delta 2910

Launch pad: Space Launch Complex 2W

Location: Vandenberg SFB, CA, USA

...

Go to the launch

Latest news about this satellite

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