Space Brief 1 Jun 2025
Today's highlights cover critical satellite launches including SpaceX's GPS III mission, advancements in SATCOM technology, and changes in NASA leadership.
Launch Date
February 16, 1971
Launch Site
KSCUT
Launch Pad
M
Launch Vehicle
Mu-4S
NORAD ID
04952
International Designator
1971-011A
Epoch
Sun, 19 Jul 2026 08:02:00 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
29.67°
Right Ascension
178.06°
Eccentricity
Calculating...
Argument of Perigee
240.57°
Period
105.99 min
Mean Motion
13.59 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Name
TANSEI-1 (MS-T1)
Alternative Name
Tansei-1
Type
Status
Owner
ISAS
Country
Japan
Constellation
N/A
Related Satellites
Major Events
N/A
1 04952U 71011A 26200.33472306 .00000071 00000+0 42199-5 0 9995
2 04952 29.6652 178.0609 0079604 240.5683 266.2989 13.58639696752908
Source: Celestrak
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.
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
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
Learn more about satellites and other related topics.
Today's highlights cover critical satellite launches including SpaceX's GPS III mission, advancements in SATCOM technology, and changes in NASA leadership.
SpaceX successfully launched another batch of Starlink satellites while marking a significant milestone with the 500th Falcon 9 mission. Additionally, the company is preparing for further testing of its Starship system and has begun collaborating with Amazon on their Project Kuiper constellation.
SpaceX gears up for a busy week with new Starship testing and enhanced Starlink capabilities on the horizon.
Today's highlights include new ESA Euclid data, upcoming Blue Origin flight, and multiple Starlink launches, delivering fresh satellite tracking opportunities.
Forty-two years ago, an Atlas H rocket climbed into the California sky carrying four objects that would help the U.S. Navy track every Soviet warship on the planet - a mission so secret that even the satellites' true name wasn't declassified until 2023
At 7:33 on the morning of 18 June 1983, a 32-year-old astrophysicist named Sally Ride rode Challenger off Pad 39A and became the first American woman in space. She got there two decades after the Soviets, and only after months of being asked whether spaceflight would damage her reproductive organs and whether she planned to cry.
Today's briefing highlights SpaceX's recent launch of spy satellites, a US Space Force contract for deep space tracking, and advancements in quantum communications in space.
Sixty-six years ago, a Thor-Agena rocket thundered into the California sky carrying Discoverer 1, the first satellite attempt at polar orbit and the secret vanguard of Americas space reconnaissance program