X Report 17 Mar 2025
SpaceX's Crew-10 mission safely docks with the ISS, setting up for a crew rotation. Starlink continues its global expansion with additional satellite deployments.
STARLINK-3139 (49425)
COSPAR: 2021-104T | Alt Name: Starlink 3139
Image
Additional Sources
Launch Details
Launch Date
November 13, 2021
Launch Site
Launch Pad
LC40
Launch Vehicle
Orbital Elements
NORAD ID
49425
International Designator
2021-104T
Epoch
Sat, 04 Jul 2026 08:00:03 GMT
Apogee
Calculating...
Perigee
Calculating...
Inclination
53.16°
Right Ascension
64.65°
Eccentricity
Calculating...
Argument of Perigee
70.40°
Period
94.39 min
Mean Motion
15.26 rev/day
Latitude
Calculating...
Longitude
Calculating...
Altitude
Calculating...
Velocity
Calculating...
Polar Plot
3D Visualization
Basic Satellite Info
Name
STARLINK-3139
Alternative Name
Starlink 3139
Type
Payload
Status
Operational
Owner
SPXS
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 49425U 21104T 26185.33336806 .01511887 00000-0 53563-1 0 9990
2 49425 53.1608 64.6535 0001414 70.4026 310.7790 15.25623200 4914
Source: Celestrak
Summary
The satellite STARLINK-3139 (2021-104T) is part of SpaceX's Starlink constellation and was launched on November 13, 2021, from LC40 at AFETR using a Falcon 9 launch vehicle. It has dimensions of 0.2 meters in length, 2.8 meters in diameter, and a span of 9 meters, with a dry mass of 270 kg and a launch mass of 290 kg. The satellite is equipped with Ku/Ka-band payload for communication purposes, an optical inter-satellite link, solar arrays, batteries for power generation, and uses krypton ion thrusters as its propulsion system. Its purpose is to provide communication services as part of the Starlink Group 4-1-18 mission.
Starlink is a satellite constellation developed by SpaceX with the aim of providing global broadband internet coverage. Thousands of small satellites are deployed in low Earth orbit (LEO), enabling high-speed internet access even in remote areas. However, the rapid increase in satellites raises concerns about space debris and the potential for collisions, which can lead to further debris creation and endanger other spacecraft. Additionally, the sheer number of Starlink satellites can affect astronomical observations by increasing light pollution. Proper deorbiting plans and international coordination are essential to mitigate these challenges and ensure long-term sustainability in space.
Starlink is a satellite constellation developed by SpaceX with the aim of providing global broadband internet coverage. Thousands of small satellites are deployed in low Earth orbit (LEO), enabling high-speed internet access even in remote areas. However, the rapid increase in satellites raises concerns about space debris and the potential for collisions, which can lead to further debris creation and endanger other spacecraft. Additionally, the sheer number of Starlink satellites can affect astronomical observations by increasing light pollution. Proper deorbiting plans and international coordination are essential to mitigate these challenges and ensure long-term sustainability in space.
Physical Characteristics
Length
0.2
Diameter
2.8
Span
9
Dry Mass
270
Launch Mass
290
Shape
Box + pan
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Starlink Group 4-1-18
Purpose
Communication
Mission
Communication
Manufacturer
SPXS
Life Expectancy
Unknown
Bus
Starlink
Configuration
Unknown
Motor
Krypton ion thrusters
Equipment
Ku/Ka-band payload, optical inter-satellite link
Power System
Solar arrays, 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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