X Report 30 Mar 2025
SpaceX gears up for major Starlink launch, while Starship developments continue to shape commercial spacefrontiers.
COSMOS 399 (05003)
COSPAR: 1971-017A | Alt Name: Kosmos-399
DECAYED
Image
Additional Sources
Launch Details
Launch Date
March 3, 1971
Launch Site
Launch Pad
LC31
Launch Vehicle
Voskhod 11A57
Orbital Elements
NORAD ID
05003
International Designator
1971-017A
Decay Date
3/17/1971
Basic Satellite Info
Name
COSMOS 399
Alternative Name
Kosmos-399
Type
Payload
Status
Decayed
Owner
GUKOSR
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
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
6
Diameter
2.2
Span
6
Dry Mass
2200
Launch Mass
2200
Shape
Sphere + DCone
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Rotor No. 20L
Purpose
Unknown
Mission
Unknown
Manufacturer
TSKBE3
Life Expectancy
Unknown
Bus
Zenit-4M
Configuration
Unknown
Motor
Unknown
Equipment
Unknown
Power System
Unknown
ADCS
Unknown
Transmitter Frequency
Unknown
Satellite Articles
View All Posts »Learn more about satellites and other related topics.
X Report 6 Aug 2025
SpaceX has adapted Pad 1 for Ship Static Fire tests while addressing the recent downtime at Massey’s, showcasing its commitment to maintaining launch schedules despite setbacks.
X Report 19 Aug 2025
SpaceX receives FAA clearance for Starship Flight 10 and celebrates its 100th Falcon 9 launch of the year, successfully deploying 24 Starlink satellites.
SpaceX IPO Raises $75B, SPCX Surges 20% on Day One | KeepTrack X Report
SpaceX debuted on Nasdaq as SPCX at $135/share, raising a record $75B and pushing Elon Musk's net worth past $1 trillion for the first time.
Musk Confirms Starmind AI Constellation, X Report 24 Jun 2026
Musk confirms Starmind, an AI satellite constellation targeting 1 million orbital compute nodes. Starfall's debut and Dragon's ISS departure follow.
Artemis 2 Crew Arrives for April 1 Lunar Flyby Launch | KeepTrack Space Brief
Artemis 2 astronauts arrive at KSC for April 1 launch. Four-person crew will fly lunar free-return trajectory, first crewed lunar mission since Apollo 17 in 1972.
The Day the Dyna-Soar Dream Died
Exactly 62 years ago, Defense Secretary Robert McNamara ended the X-20 Dyna-Soar program, canceling one of the most ambitious spaceplane projects of the early Space Race - a vehicle that could have put aircraft in orbit decades before the Space Shuttle.
Pentagon Orders 30,000 One-Way Drones; Sierra Space Raises $550M | KeepTrack Space Brief
Pentagon to order 30,000 attritable drones within days via Gauntlet competition. Meanwhile, Sierra Space closes $550M Series C funding round for national security spaceplane applications.