ST-1 (25460)

COSPAR: 1998-049A | Alt Name: ST-1

Image
ST-1 Satellite Image
Additional Sources
Launch Details

Launch Date

August 25, 1998

Launch Site

FRGUI

Launch Pad

ELA2

Launch Vehicle

Ariane 44P

Orbital Elements

NORAD ID

25460

International Designator

1998-049A

Epoch

Sat, 04 Jul 2026 02:19:52 GMT

Apogee

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Perigee

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Inclination

11.10°

Right Ascension

45.19°

Eccentricity

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Argument of Perigee

334.44°

Period

1458.29 min

Mean Motion

0.99 rev/day

Latitude

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Longitude

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Altitude

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Velocity

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Polar Plot
3D Visualization
Basic Satellite Info

Name

ST-1

Alternative Name

ST-1

Type

Payload

Status

Non-operational

Owner

STEL

Country

Singapore

Constellation

N/A

Related Satellites

Major Events

N/A

Latest TLEs
1 25460U 98049A   26185.09713831  .00000000  00000-0  00000-0 0  9991
2 25460  11.0979  45.1866 0012674 334.4411  25.7859  0.98745496 45238

Source: Celestrak

Summary
ST-1 is a communication satellite launched on August 25, 1998, from Guiana Space Centre using an Ariane 44P launch vehicle. The spacecraft measures 2.9 meters in length and has a diameter of 1.7 meters with a span of 22.5 meters. It was manufactured by MMST and is equipped with 16 Ku-band transponders, 14 C-band transponders, two deployable solar arrays, and batteries for power supply. The satellite's dry mass is 1502 kg, and it had a launch mass of 3255 kg. ST-1 serves as part of the Singapore-Taiwan 1 payload with a mission duration of 12 years, operated by STEL, and was stabilized in orbit by August 29, 1998. Its configuration is based on the Eurostar-2000+ bus, with a shape described as Box + 2 Pan and an RCS (Reaction Control System) value of 6.8618.
Physical Characteristics

Length

2.9

Diameter

1.7

Span

22.5

Dry Mass

1502

Launch Mass

3255

Shape

Box + 2 Pan

Radar Cross Section

6.8618

Visual Magnitude

Unknown

Color

Unknown

Material Composition

Unknown

Technical Details

Payload

Singapore-Taiwan 1

Purpose

Communication

Mission

Communication

Manufacturer

MMST

Life Expectancy

12 years

Bus

Eurostar 2000+

Configuration

Eurostar-2000+

Motor

R-4D-11-300

Equipment

16 Ku-band transponders, 14 C-band transponders

Power System

2 deployable solar arrays, batteries

ADCS

Unknown

Transmitter Frequency

Unknown

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