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

13124

Days in orbit

Revolutions

≈ 14.5

Per day

Orbit

SSO

Sun Synchronous Orbit

Inclination

97.1

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: 1989-089B

Object number (NORAD): 20323

Object ID (CCSDS): 20323

Country: UNITED STATES OF AMERICA (US)

Current information (Y/N): Y

RCS size: LARGE

Orbital parameters

Period: 99.275 minutes

Inclination: 97.0811 deg

SMA: 7102.117 km

Apoapsis: 772.778 km

Periapsis: 675.186 km

RAAN: 160.6788 deg

Eccentricy: 0.0068706

Argument of periapsis: 195.012 deg

Mean anomaly: 164.904 deg

Mean motion: 14.50511008 rev/day

Mean motion (dot): 0.00000539 rev/day²

B* drag term: 0.00014252 1/R_Earth

Two-line elements (TLE)

Creation date: Oct. 23, 2025, 10:16 p.m.

Reference frame: TEME

Reference center: EARTH

Epoch: Oct. 23, 2025, 11:45 a.m. UTC

TLE line 0: 0 DELTA 1 R/B

TLE line 1: 1 20323U 89089B 25296.49005126 .00000539 00000-0 14252-3 0 9999

TLE line 2: 2 20323 97.0811 160.6788 0068706 195.0120 164.9040 14.50511008875840

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
FENGYUN 1C DEB	SSO	2025-05-28 06:04:38	0.0001673011	105.0 (m)	DEBRIS
COSMOS 2251 DEB	LEO	2025-05-19 20:51:37	0.0004698752	54.0 (m)	DEBRIS
COSMOS 2251 DEB	LEO	2025-05-19 19:12:18	0.0002029917	455.0 (m)	DEBRIS
FENGYUN 1C DEB	SSO	2024-10-23 01:05:42	0.0001653184	499.0 (m)	DEBRIS
COSMOS 2251 DEB	LEO	2024-08-22 18:41:43	0.0001182886	59.0 (m)	DEBRIS

Associated space launch

Cosmology research satellite

DELTA 1 R/B was lifted into orbit during the mission ‘Delta 5920-8 | COBE’, on board a Delta 5920-8 space rocket.

The launch took place on Nov. 18, 1989, 2:34 p.m. from Space Launch Complex 2W.

For more information about the launch, click the button.

Delta 5920-8 | COBE

Agency: N/A

Status: Launch Successful

Launch date: Nov. 18, 1989, 2:34 p.m. UTC

Rocket: Delta 5920-8

Launch pad: Space Launch Complex 2W

Location: Vandenberg SFB, CA, USA

...

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