X Report 18 Dec 2025
SpaceX carried out a double-header Starlink launch from both coasts while milestones from Max Space and Lux Aeterna signal growth in the commercial space sector.
STARLINK-3129 (49453)
COSPAR: 2021-104AX | Alt Name: Starlink 3129
Image
Additional Sources
Launch Details
Launch Date
November 13, 2021
Launch Site
Launch Pad
LC40
Launch Vehicle
Orbital Elements
NORAD ID
49453
International Designator
2021-104AX
Epoch
Sat, 04 Jul 2026 00:40:18 GMT
Apogee
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Perigee
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Inclination
53.16°
Right Ascension
54.26°
Eccentricity
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Argument of Perigee
111.03°
Period
94.01 min
Mean Motion
15.32 rev/day
Latitude
Calculating...
Longitude
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Altitude
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Velocity
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Polar Plot
3D Visualization
Basic Satellite Info
Name
STARLINK-3129
Alternative Name
Starlink 3129
Type
Payload
Status
Operational
Owner
SPXS
Country
United States
Constellation
N/A
Related Satellites
Major Events
N/A
Latest TLEs
1 49453U 21104AX 26185.02798840 .00002263 00000-0 84630-4 0 9991
2 49453 53.1614 54.2601 0001019 111.0254 249.0856 15.31709138256375
Source: Celestrak
Summary
The satellite named STARLINK-3129, also known as Starlink 3129, is a part of the Starlink constellation operated by SPXS (SpaceX). It was launched on November 13, 2021, from Launch Complex 40 at Cape Canaveral Air Force Station using a Falcon 9 launch vehicle. The satellite has dimensions of approximately 0.2 meters in length and 2.8 meters in diameter with a span of 9 meters due to its solar arrays or other deployable elements. Its dry mass is 270 kilograms, and it weighed 290 kilograms at launch. Equipped with Ku/Ka-band payload and an optical inter-satellite link for communication purposes, the satellite also features Krypton ion thrusters as motors and utilizes solar arrays along with batteries for power generation.
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 4-1-46
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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