Starlink Hits 10,000 Satellites in Orbit, X Report 17 Mar 2026
How many Starlink satellites are in orbit in 2026? SpaceX passed 10,000 after the Starlink 17-24 launch, with 10,020 in orbit and 11,529 launched.
TANSEI-1 (MS-T1) (04952)
COSPAR: 1971-011A | Alt Name: Tansei-1
Image
Additional Sources
Launch Details
Launch Date
February 16, 1971
Launch Site
KSCUT
Launch Pad
M
Launch Vehicle
Mu-4S
Orbital Elements
NORAD ID
04952
International Designator
1971-011A
Epoch
Sat, 04 Jul 2026 05:59:21 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
29.67°
Right Ascension
255.19°
Eccentricity
Calculating...
Argument of Perigee
117.45°
Period
105.99 min
Mean Motion
13.59 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Polar Plot
3D Visualization
Basic Satellite Info
Name
TANSEI-1 (MS-T1)
Alternative Name
Tansei-1
Type
Payload
Status
Non-operational
Owner
ISAS
Country
Japan
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 04952U 71011A 26185.24955241 .00000094 00000-0 38501-4 0 9998
2 04952 29.6659 255.1912 0079535 117.4513 283.1734 13.58639203750858
Source: Celestrak
Summary
Apologies, there is no summary for this satellite yet. I am working to generate these for every object in the catalog, but it is going to take time.
Physical Characteristics
Length
0.8
Diameter
0.8
Span
0.8
Dry Mass
63
Launch Mass
63
Shape
Poly
Radar Cross Section
0.6731
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
MS-T1
Purpose
Technology
Mission
Technology
Manufacturer
ISAS
Life Expectancy
Unknown
Bus
ISAS MS
Configuration
Unknown
Motor
Unknown
Equipment
Unknown
Power System
Batteries
ADCS
Unknown
Transmitter Frequency
Unknown
Map
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration
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