CZ-4B R/B (49073)

COSPAR: 2021-074C | Alt Name: CZ-4B Y50 Stage 3
DECAYED

Image
CZ-4B R/B Satellite Image
Additional Sources
Launch Details

Launch Date

August 18, 2021

Launch Site

TAISC

Launch Pad

LC9

Launch Vehicle

Chang Zheng 4B

Orbital Elements

NORAD ID

49073

International Designator

2021-074C

Decay Date

9/3/2022

Basic Satellite Info

Name

CZ-4B R/B

Alternative Name

CZ-4B Y50 Stage 3

Type

Rocket Body

Status

Space Junk

Owner

CNSA

Country

China

Constellation

N/A

Related Satellites

Major Events

N/A

Summary
A rocket body, also commonly referred to as an upper stage or spent rocket stage, is the structural shell left behind after a rocket has delivered its payload to orbit. These large and often heavy pieces of space hardware can remain in orbit for years, posing significant collision hazards as part of the growing space debris problem. If left uncontrolled, rocket bodies have the potential to reenter Earth's atmosphere unpredictably, which can lead to falling debris in populated areas. Additionally, they risk colliding with operational satellites or the International Space Station, creating more debris and putting human life at risk.
Physical Characteristics

Length

6.9

Diameter

2.9

Span

6.9

Dry Mass

1000

Launch Mass

1000

Shape

Cyl

Radar Cross Section

Unknown

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

CZ-4B Stage 3

Purpose

Unknown

Mission

Unknown

Manufacturer

SAST

Life Expectancy

Unknown

Bus

CZ-4 Stage 3

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.

Space Brief 2 Sep 2025

Space Brief 2 Sep 2025

Today's brief covers key topics such as SpaceX's latest Starlink launch, the European Space Agency's new initiatives, and Space Force's integration of AI into its operations.

CelesTrak.org

CelesTrak.org

An in-depth look at CelesTrak, the leading non-profit provider of orbital element sets and collision assessment tools, trusted by space professionals worldwide.

Virgin Galactic's Upcoming "Galactic 06" Spaceflight

Virgin Galactic's Upcoming "Galactic 06" Spaceflight

On January 26, 2024, Virgin Galactic's "Galactic 06" mission will launch, marking its 11th spaceflight.

Falcon Heavy Returns After 18-Month Hiatus for ViaSat-3 | KeepTrack X Report

Falcon Heavy Returns After 18-Month Hiatus for ViaSat-3 | KeepTrack X Report

SpaceX's Falcon Heavy lifts off for the 12th time after 18 months grounded, delivering the final ViaSat-3 satellite from LC-39A at 10:21 a.m. EDT.

EUTELSAT 172B

EUTELSAT 172B

Europe's first high-power all-electric telecom satellite doesn't just sit above the Pacific - it got there on robotic arms and plasma thrusters, broke records doing it, and now keeps your airplane Wi-Fi running between LA and Tokyo.

Starship Flight 12 Targets May 19 with Redesigned Ship | KeepTrack X Report

Starship Flight 12 Targets May 19 with Redesigned Ship | KeepTrack X Report

SpaceX targets May 19 for Starship Flight 12 debut, while CRS-34 delivers 6,500 lbs of cargo to ISS aboard a Falcon 9.

Space Brief 27 Oct 2025

Space Brief 27 Oct 2025

Today's space highlights include the US Space Force's advanced tracking contract, a milestone in SpaceX's Starlink program, and a new initiative to remove space debris.

STS-51B | Three-Tenths of a Second from Disaster

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.