ROSAT (20638)

COSPAR: 1990-049A | Alt Name: ROSAT
DECAYED

Image
ROSAT Satellite Image
Additional Sources
Launch Details

Launch Date

June 1, 1990

Launch Pad

LC17A

Launch Vehicle

Delta 6920-10

Orbital Elements

NORAD ID

20638

International Designator

1990-049A

Decay Date

10/23/2011

Basic Satellite Info

Name

ROSAT

Alternative Name

ROSAT

Type

Payload

Status

Decayed

Owner

DLR

Country

Germany

Constellation

N/A

Related Satellites

Major Events

N/A

Summary
ROSAT was an X-ray astronomy satellite launched by DLR on June 1, 1990, from Cape Canaveral Air Force Station using a Delta 6920-10 launch vehicle. The spacecraft measured 4.5 meters in length with a diameter of 2.2 meters and a span of 8.9 meters, had a dry mass of 2426 kg, and was equipped with an X-ray telescope along with PSPC, HRI, and WFC instruments for capturing astronomical data. The satellite operated for 8.4 years, exceeding its initial design lifetime of 5 years. Its power came from deployable fixed solar arrays and batteries. ROSAT was manufactured by DASAF and had a box shape with two panels.
Physical Characteristics

Length

4.5

Diameter

2.2

Span

8.9

Dry Mass

2426

Launch Mass

2426

Shape

Box + 2 Pan

Radar Cross Section

6.7973

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

ROSAT

Purpose

Astronomy, X-Ray

Mission

Astronomy, X-Ray

Manufacturer

DASAF

Life Expectancy

5 years (design); 8.4 years reached

Bus

ROSAT

Configuration

Unknown

Motor

Unknown

Equipment

X-Ray telescope, PSPC, HRI, WFC

Power System

Deployable fixed solar array, batteries

ADCS

Unknown

Transmitter Frequency

Unknown

Satellite Articles

View All Posts »

Learn more about satellites and other related topics.

Space Brief 18 Apr 2025

Space Brief 18 Apr 2025

Today's highlights include a Minotaur IV launch of U.S. spy satellites, Rocket Lab's new defense contracts, and the unveiling of Space Force's warfighting framework. Plus, the Satellite Spotlight dives into METEOR 3-1.

The Dog They Never Planned to Bring Home

The Dog They Never Planned to Bring Home

On April 14, 1958, Sputnik 2 burned up over the North Atlantic, carrying the remains of a stray dog from Moscow who had been dead for five months. The Soviet Union told the world she survived for days. It took forty-five years for the truth to come out.

X Report 29 Aug 2025

X Report 29 Aug 2025

SpaceX celebrates a record-breaking Falcon 9 launch while Starship demonstrates strong performance in its recent test flight, fueling excitement for upcoming projects.

X Report 26 Jul 2025

X Report 26 Jul 2025

This week's SpaceX developments include notable upcoming missions, with a Starlink launch on the horizon and Crew Dragon's readiness for the next astronaut mission.

Space Brief 21 Nov 2024

Space Brief 21 Nov 2024

Today's brief covers influential space events including Space Force's interest in Starship, U.S. military constellation advancements, and technological developments in counter-drone capabilities.

Satellites by Country

Satellites by Country

Explore a comprehensive breakdown of satellite counts by country, detailing the USA, Russia, China, and others.

SpaceX Wins $178.5M Space Force Missile Tracking Contract | KeepTrack Space Brief

SpaceX Wins $178.5M Space Force Missile Tracking Contract | KeepTrack Space Brief

SpaceX awarded $178.5M Space Force contract for missile tracking satellite launches beginning 2027. Pentagon also extends GPS modernization support with $45M Raytheon order.

The Pentagon's Mystery Spaceplane Takes Off

The Pentagon's Mystery Spaceplane Takes Off

On April 22, 2010, an Atlas V lifted off from Cape Canaveral carrying a reusable robotic spaceplane so secret that the Air Force would not even confirm its mission duration. It came back 224 days later, lighter, quieter, and more operational than anyone outside Washington had expected. Fifteen years later, the X-37B is still flying, and the military still will not say what it does.