**Koreasat 1 --> Europe*Star B**

**South Korea --> Europe*Star**

International Sat. n°:

S. Korea satellite n°: 3

Also called Mugunghwa 1, Europe*Star B

Launch data:

Designation:	23639 / 95041A
Launch date	05 Aug 1995 at 11:10 UT
Launch site:	CC, LC-17B
Launch vehicle:	Delta-7925 (#228)
Mission:	Telecommunications:
Geostationary orbit on:
Perigee / Apogee	km
Inclination	°
Period	min

The launch experienced a partial failure: a booster rocket to separate. The preliminary reports indicate that explosive lines on the Delta 2 vehicle were damaged by exposure to excessive temperatures, causing one of the solid motors not to separate. The booster separation malfunction was blamed on the heat-related failure of insulation protecting the rocket's booster separation circuits.

This resulted in a wrong orbit delivery. The satellite reached GEO at the end of August on its own and used part of is propellant. Thus its lifetime was reduced to 4.5 years.

Spacecraft data:

Prime manufacturer	Martin Marietta --> Lockheed Martin Astro
Platform	AS-3000
Operator	Korea Telecom --> Europe*Star
Mass at launch	1464 kg
Dry Mass	711 kg
Basic shape
Dimension (m)
Equipment	12 (+4) FSS Ku-band transponders, 3 (+3) BSS Ku-band transponders
Solar array	2 deployable solar arrays
Stabilization
Propulsion	Star-30E
DC power
Design lifetime

Location

Begin	End	Position
L: 5 Aug 1995	Apr 2000	116°E
Jul 2000	Sep 2000	45°E (Europestar B)
Oct 2000		47.5°E

After relocation, its beam is said to be focused on Hungary.

Mission details

During the launch of Koreasat 1 one of nine solid boosters of the Delta-7925 launch vehicle failed to separate from the rocket, which, therefore, failed to achieve a geostationary orbit. It used up some of the reserved fuel to move it to the geostationary orbit (over the Solomon Islands). This fuel loss entailed a reduced operational lifetime.
Koreasat 1 was sold to Europe*Star as Europe*Star B.
Equipped with a Star 30 solid apogee motor. Carries 625 kg of fuel for the apogee motor and 187 kg of hydrazine propellant.

Ref: #7, #14 - update: 18.11.11