SL-4 R/B (19207)

COSPAR: 1988-049B | Alt Name: Soyuz-U 35-376 Blok-I
DECAYED

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

Launch Date

June 11, 1988

Launch Pad

LC1

Launch Vehicle

Soyuz-U

Orbital Elements

NORAD ID

19207

International Designator

1988-049B

Decay Date

6/17/1988

Basic Satellite Info

Name

SL-4 R/B

Alternative Name

Soyuz-U 35-376 Blok-I

Type

Rocket Body

Status

Space Junk

Owner

RVSN

Country

USSR

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

6.7

Diameter

2.7

Span

6.7

Dry Mass

2350

Launch Mass

2350

Shape

Cyl

Radar Cross Section

35.54

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

11S510

Purpose

Unknown

Mission

Unknown

Manufacturer

PROG

Life Expectancy

Unknown

Bus

Blok-I

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 21 May 2025

Space Brief 21 May 2025

Today's Space Brief covers significant events including a high-stakes missile defense program, recent Chinese satellite launches, military defense initiatives, and key profiles in defense leadership.

Space Brief 23 Oct 2024

Space Brief 23 Oct 2024

Today's brief shines a light on surging space debris due to a new satellite breakup, SpaceX's continuous Starlink expansions, and notable legal support for Elon Musk's launch endeavors.

GPS III SV10 Launches on Falcon 9, X Report 20 Apr 2026

GPS III SV10 Launches on Falcon 9, X Report 20 Apr 2026

GPS III SV10 launched April 21 on a SpaceX Falcon 9 with 3x better accuracy and 8x anti-jamming. Starlink stands at 10,263 working satellites.

Space Brief 19 Feb 2025

Space Brief 19 Feb 2025

Today's brief covers launches by SpaceX and mysterious Space Force missions, along with updates on Japan's moon lander and US-UAE defense deals.

The Satellites the Size of a Studio Apartment

The Satellites the Size of a Studio Apartment

AST SpaceMobile's BlueBird constellation is a bet that raw aperture size wins. Each satellite unfolds a 64-square-meter phased-array antenna in orbit, the largest commercial antenna ever deployed. The company claims a stock smartphone on the ground can connect directly to it. The competition says the physics doesn't support that. Seventeen satellites in and a contract with AT&T, Verizon, and Vodafone, somebody's math is wrong.

X Report 29 Apr 2025

X Report 29 Apr 2025

SpaceX achieves a significant milestone with its 250th Starlink mission, and Starlink eyes expansion into South Korea amid rising global demand for satellite internet. Meanwhile, Amazon's Project Kuiper launches its first operational mission, marking increased competition for Starlink.

X Report 22 Dec 2025

X Report 22 Dec 2025

SpaceX celebrates a year of industry milestones, including the successful deployment of Starlink satellites and innovative advancements in rocket technology.

X Report 3 May 2025

X Report 3 May 2025

Key updates include a successful Falcon 9 launch of 28 Starlink satellites and a static fire test of the Starship spacecraft, while T-Mobile's Starlink service aims to attract new customers.