SIRIUS 3 (25492)

COSPAR: 1998-056B | Alt Name: Sirius 3

Image
SIRIUS 3 Satellite Image
Additional Sources
Launch Details

Launch Date

October 5, 1998

Launch Site

FRGUI

Launch Pad

ELA2

Launch Vehicle

Ariane 44L

Orbital Elements

NORAD ID

25492

International Designator

1998-056B

Epoch

Fri, 03 Jul 2026 19:05:06 GMT

Apogee

Calculating...

Perigee

Calculating...

Inclination

11.81°

Right Ascension

34.23°

Eccentricity

Calculating...

Argument of Perigee

63.97°

Period

1454.00 min

Mean Motion

0.99 rev/day

Latitude

Calculating...

Longitude

Calculating...

Altitude

Calculating...

Velocity

Calculating...

Polar Plot
3D Visualization
Basic Satellite Info

Name

SIRIUS 3

Alternative Name

Sirius 3

Type

Payload

Status

Non-operational

Owner

NSAB

Country

Sweden

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs
1 25492U 98056B   26184.79520965 -.00000160  00000-0  00000-0 0  9992
2 25492  11.8128  34.2307 0002390  63.9730 113.4533  0.99037365101280

Source: Celestrak

Summary
SIRIUS 3, also known as Sirius 3, is a communication satellite with the NORAD Catalog ID of 25492 and OBJECT_ID 1998-056B. Launched on October 5, 1998, from ELA2 at the Guiana Space Centre using an Ariane 44L launch vehicle, it was manufactured by HSES and owned by NSAB. The satellite has a cylindrical shape with dimensions of 7.8 meters in length and diameter, spans 7.8 meters, and weighs 597 kilograms dry. It carries 15 Ku-band transponders for its communication mission and is powered by solar cells mounted on the body and drop-skirt, along with batteries. The satellite has a launch mass of 790 kilograms and an operational lifetime of 12 years.
Physical Characteristics

Length

7.8

Diameter

2.2

Span

7.8

Dry Mass

597

Launch Mass

790

Shape

Cyl

Radar Cross Section

25.1189

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

Sirius 3

Purpose

Communication

Mission

Communication

Manufacturer

HSES

Life Expectancy

12 years

Bus

HS-376HP

Configuration

HS-376HP

Motor

Star 30

Equipment

15 Ku-band transponders

Power System

Solar cells (body mounted and drop-skirt), batteries

ADCS

Unknown

Transmitter Frequency

Unknown

Map
This tool will help you track the satellite's position and predict its upcoming passes over your location. Simply input the coordinates or click the geolocation button to get started.
Next Pass
Azimuth Elevation Time (Local)
Start Azimuth
Max Elevation
Stop Azimuth
Time Until
Pass Duration

Satellite Articles

View All Posts »

Learn more about satellites and other related topics.

Crew-11 Medical Evacuation Set for January 14, Starlink Mission Succeeds | KeepTrack X Report

Crew-11 Medical Evacuation Set for January 14, Starlink Mission Succeeds | KeepTrack X Report

NASA confirms first-ever ISS medical evacuation for January 14 via Crew Dragon. SpaceX launches 29 Starlink satellites in third mission of 2026. Artemis 2 moon mission timeline unaffected.

Falcon 9 Booster Hits Record 35th Flight | KeepTrack X Report

Falcon 9 Booster Hits Record 35th Flight | KeepTrack X Report

A Falcon 9 booster sets a reusability record on its 35th flight during the Starlink 10-35 mission, the constellation's 53rd dedicated launch.

X Report 1 Sep 2025

X Report 1 Sep 2025

SpaceX successfully launched 28 Starlink satellites from Florida, continuing its momentum in expanding global internet coverage.

Space Brief 1 Sep 2025

Space Brief 1 Sep 2025

Today's Space Brief covers the Space Force's AI integration, NASA's lunar nuclear reactor plans, ESA's Flight Ticket Initiative, Martian mantle revelations, and SpaceX's latest Starlink launch.

X Report 22 May 2025

X Report 22 May 2025

SpaceX successfully launched 23 Starlink satellites on a brand-new Falcon 9 rocket, while preparations ramp up for Starship Flight 9 and a pioneering commercial docking mission approaches.

X Report 17 May 2025

X Report 17 May 2025

SpaceX gains regulatory approval for a new Starship test flight, further expands its role in U.S. defense, and successfully launches 26 additional Starlink satellites. United Airlines also rolls out Starlink Wi-Fi on its flights.

Space Brief 16 Jul 2025

Space Brief 16 Jul 2025

Today's brief covers China's Tianzhou-9 launch to the Tiangong space station, the U.S. Space Force's unfunded MILNET project, and the evolving use of AI in military applications.

Space Brief 24 Jun 2025

Space Brief 24 Jun 2025

Today's top space events include a new military satellite launch by York Space, advancements in phased array antennas by Space Force, and the debut of Denmark's Arctic satellite. Also covered are developments in Starlink's services in Vietnam.