Japan's H3 Returns to Flight With 6 Satellites | KeepTrack Space Brief
Japan's H3 rocket successfully launched June 11, deploying 6 smallsats to orbit after December failure. First return-to-flight for JAXA's flagship heavy-lift vehicle.
SL-4 DEB (08619)
COSPAR: 1976-009D | Alt Name: Sensor cover
DECAYED
Image
Additional Sources
Launch Details
Launch Date
January 29, 1976
Launch Site
Launch Pad
LC31
Launch Vehicle
Voskhod 11A57
Orbital Elements
NORAD ID
08619
International Designator
1976-009D
Decay Date
2/9/1976
Basic Satellite Info
Name
SL-4 DEB
Alternative Name
Sensor cover
Type
Debris
Status
Space Junk
Owner
GUKOSR
Country
USSR
Constellation
N/A
Related Satellites
Major Events
N/A
Summary
Space debris, also known as space junk, encompasses all non-functional objects orbiting Earth such as defunct satellites, spent rocket stages, and fragments from collisions or disintegrations. Over time, this debris can accumulate and create an increasingly hazardous environment in orbit. Even tiny fragments, traveling at extremely high velocities, can inflict significant damage on operational satellites and spacecraft. If left unmanaged, the density of debris raises the risk of catastrophic collisions and further fragmentation, compounding the problem and threatening the safety and sustainability of space activities.
Physical Characteristics
Length
0
Diameter
0
Span
0
Dry Mass
0
Launch Mass
0
Shape
N/A
Radar Cross Section
Unknown
Visual Magnitude
Unknown
Color
Unknown
Material Composition
Unknown
Technical Details
Payload
Zenit-2M sensor cover
Purpose
Unknown
Mission
Unknown
Manufacturer
TSSKB
Life Expectancy
Unknown
Bus
Zenit deb
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 17 Dec 2025
SpaceX prepares for a busy launch schedule with key upgrades at Starbase and notable Starlink missions. Recent close approaches in orbit underscore the complexities of satellite operations.
Space Brief 11 Jan 2025
Today's brief covers SpaceX's NROL-153 launch, US Space Force activities in Greenland, Starlink's record-breaking flight, and a OneWeb satellite glitch. Plus, our Satellite Spotlight shines on Duchifat-1.
SpaceX Preps Starlink 6-96 Launch, Starship TPS Testing Continues at Starbase | KeepTrack X Report
SpaceX readies Starlink 6-96 launch of 29 satellites from Cape Canaveral. Thermal Protection System evaluations underway at Starbase for next Starship prototypes. SpaceX IPO expected to reshape market.
STS-51B | Three-Tenths of a Second from Disaster
Forty years ago today, Challenger lifted off LC-39A on a science mission that nobody outside Morton-Thiokol would call dangerous. Years later, after the orbiter and seven other astronauts were gone, investigators looked at the recovered boosters from STS-51B and realized the crew had come within a fraction of a second of dying first. This is the story of the launch that should have been a warning.
Space Brief 15 Dec 2025
Today's highlights include multiple SpaceX Starlink launches, a successful Rocket Lab mission for JAXA, and a scheduled launch update from Kennedy Space Center.
Space Brief 28 Sep 2025
Today's highlights include China's latest satellite launches, Blue Origin's expansion plans, and Purdue University's groundbreaking suborbital mission with Virgin Galactic.
SpaceX Files Plans for Million-Satellite Orbital Data Center | KeepTrack X Report
SpaceX files FCC plans for a million-satellite orbital data center constellation. Crew-12 launch timing depends on Artemis 2 mission. Cold weather delays launch window.