IRS-1B

Launch Success

Liftoff Time (GMT)

06:48:43

Thursday August 29, 1991

Mission Details

Launch Notes

Last flight of Vostok-2M, and last flight of a Vostok rocket.

IRS 1A and 1B (Indian Remote Sensing Satellite) were the first of the series of indigenous state-of-art remote sensing satellites.

Low Earth Orbit

1 Payload

980 kilograms

Rocket

Retired

Vostok-2M

Active 1964 to 1991

Manufacturer

OKB-1

Rocket

Height: 38.76m

Payload to Orbit

LEO: 5,100 kg

GTO: 0 kg

Liftoff Thrust

4,570 Kilonewtons

Fairing

Diameter: 2.58m

Height: 7.14m

Stages

3

Strap-ons

4

Launch Site

Site 31/6

Baikonur Cosmodrome, Kazakhstan

Fastest Turnaround

47 hr 9 min

Site 31/6

Baikonur Cosmodrome, Kazakhstan

Fastest Turnaround

47 hr 9 min

Stats

Vostok-2

140th

Mission

1st

Mission of 1991

OKB-1

2457th

Mission

43rd

Mission of 1991

1991

63rd

Orbital launch attempt