TANSEI 1 (MS-T1)

Satellite information

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Satellite Type and Status

PAYLOADIN ORBIT

Key statistics

Satellite TANSEI 1 (MS-T1) at a glance.

Uptime

19971

Days in orbit

Revolutions

≈ 13.6

Per day

Orbit

LEO

Low Earth Orbit

Inclination

29.7

Latest

Satellite identification and parameters

Extended collection of information and parameters for TANSEI 1 (MS-T1).

Object identification

Identified? True

Debris? False

Object name: TANSEI 1 (MS-T1)

International designator: 1971-011A

Object number (NORAD): 4952

Object ID (CCSDS): 4952

Country: JAPAN (JPN)

Current information (Y/N): Y

RCS size: MEDIUM

Orbital parameters

Period: 105.99 minutes

Inclination: 29.6657 deg

SMA: 7418.841 km

Apoapsis: 1099.779 km

Periapsis: 981.633 km

RAAN: 125.4297 deg

Eccentricy: 0.00796258

Argument of periapsis: 186.3601 deg

Mean anomaly: 337.0462 deg

Mean motion: 13.58622077 rev/day

Mean motion (dot): 0.00000115 rev/day²

B* drag term: 0.000064407571 1/R_Earth

Two-line elements (TLE)

Creation date: Oct. 21, 2025, 3:26 a.m.

Reference frame: TEME

Reference center: EARTH

Epoch: Oct. 20, 2025, 11:21 p.m. UTC

TLE line 0: 0 TANSEI 1 (MS-T1)

TLE line 1: 1 04952U 71011A 25293.97340359 .00000115 00000-0 64408-4 0 9994

TLE line 2: 2 04952 29.6657 125.4297 0079626 186.3601 337.0462 13.58622077715977

Live tracking on map

Real-time ground track for satellite TANSEI 1 (MS-T1).

In-orbit conjunctions

A list of the most updated potential collisions computed for object TANSEI 1 (MS-T1).

Target	Orbit	TCA	Probability of collision	Miss distance	Type
SL-16 DEB	LEO	2024-08-19 01:50:57	0.0001186902	479.0 (m)	DEBRIS

Associated space launch

Japanese technological test satellite designed by the Institute of Space and Aeronautical Science, University of Tokyo.

TANSEI 1 (MS-T1) was lifted into orbit during the mission ‘Mu-4S | Tansei-1’, on board a Mu-4S space rocket.

The launch took place on Feb. 16, 1971, 4 a.m. from Mu Center.

For more information about the launch, click the button.

Mu-4S | Tansei-1

Agency: N/A

Status: Launch Successful

Launch date: Feb. 16, 1971, 4 a.m. UTC

Rocket: Mu-4S

Launch pad: Mu Center

Location: Uchinoura Space Center, Japan

...

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