EXPLORER 11

Satellite information

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Satellite Type and Status

PAYLOADIN ORBIT

Key statistics

Satellite EXPLORER 11 at a glance.

Uptime

23448

Days in orbit

Revolutions

≈ 14.2

Per day

Orbit

LEO

Low Earth Orbit

Inclination

28.8

Latest

Satellite identification and parameters

Extended collection of information and parameters for EXPLORER 11.

Object identification

Identified? True

Debris? False

Object name: EXPLORER 11

International designator: 1961-013A

Object number (NORAD): 107

Object ID (CCSDS): 107

Country: UNITED STATES OF AMERICA (US)

Current information (Y/N): Y

RCS size: MEDIUM

Orbital parameters

Period: 101.419 minutes

Inclination: 28.7854 deg

SMA: 7203.998 km

Apoapsis: 1188.856 km

Periapsis: 462.871 km

RAAN: 138.1219 deg

Eccentricy: 0.0503877

Argument of periapsis: 158.3501 deg

Mean anomaly: 203.9194 deg

Mean motion: 14.19849603 rev/day

Mean motion (dot): 0.00001063 rev/day²

B* drag term: 0.00011193 1/R_Earth

Two-line elements (TLE)

Creation date: July 8, 2025, 2:27 a.m.

Reference frame: TEME

Reference center: EARTH

Epoch: July 7, 2025, 10:06 p.m. UTC

TLE line 0: 0 EXPLORER 11

TLE line 1: 1 00107U 61013A 25188.92098046 .00001063 00000-0 11193-3 0 9999

TLE line 2: 2 00107 28.7854 138.1219 0503877 158.3501 203.9194 14.19849603227488

Live tracking on map

Real-time ground track for satellite EXPLORER 11.

In-orbit conjunctions

A list of the most updated potential collisions computed for object EXPLORER 11.

Target	Orbit	TCA	Probability of collision	Miss distance	Type
COSMOS 2195	LEO	2025-06-14 17:34:35	0.001320837	911.0 (m)	PAYLOAD
COSMOS 1275 DEB	LEO	2024-11-02 20:29:20	0.0003607363	277.0 (m)	DEBRIS
CZ-4 DEB	SSO	2024-07-20 21:54:33	0.0001684341	842.0 (m)	DEBRIS

Associated space launch

EXPLORER 11 was lifted into orbit during the mission ‘Juno II | Explorer 11’, on board a Juno II space rocket.

The launch took place on April 27, 1961, 2:16 p.m. from Launch Complex 26B.

For more information about the launch, click the button.

Juno II | Explorer 11

Agency: N/A

Status: Launch Successful

Launch date: April 27, 1961, 2:16 p.m. UTC

Rocket: Juno II

Launch pad: Launch Complex 26B

Location: Cape Canaveral SFS, FL, USA

...

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