Delta 5920 - Delta 5920-8 no. 189 - COSPAR 1989-089 14,952 bytes. 185 x 464 pixels.

Launches: 1. Failures: 0. Success Rate: 100.00% pct. First Launch Date: 18 November 1989. Last Launch Date: 18 November 1989. LEO Payload: 3,848 kg. to: 185 km Orbit. Payload: 1,405 kg. to a: Geosynchronous transfer trajectory. Liftoff Thrust: 353,730 kgf. Total Mass: 201,580 kg. Core Diameter: 2.4 m. Total Length: 34.0 m. Flyaway Unit Cost $: 34.22 million. in 1985 unit dollars.

• Stage Number: 0. 9 x Castor 4A Gross Mass: 11,743 kg. Empty Mass: 1,529 kg. Thrust (vac): 48,774 kgf. Isp: 266 sec. Burn time: 56 sec. Isp(sl): 237 sec. Diameter: 1.0 m. Span: 1.0 m. Length: 9.1 m. Propellants: Solid No Engines: 1. TX-780

• Stage Number: 1. 1 x Delta Thor RS27 Gross Mass: 84,368 kg. Empty Mass: 4,360 kg. Thrust (vac): 105,053 kgf. Isp: 296 sec. Burn time: 223 sec. Isp(sl): 262 sec. Diameter: 2.4 m. Span: 2.4 m. Length: 22.4 m. Propellants: Lox/Kerosene No Engines: 1. RS-27

• Stage Number: 2. 1 x Delta K Gross Mass: 6,954 kg. Empty Mass: 950 kg. Thrust (vac): 4,450 kgf. Isp: 319 sec. Burn time: 431 sec. Diameter: 1.7 m. Span: 2.4 m. Length: 5.9 m. Propellants: N2O4/Aerozine-50 No Engines: 1. AJ10-118K

• COBE Spacecraft: COBE. Mass: 2,265 kg.

  Cosmic Background Explorer; measured background galactic infrared radiation. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B).

• 42 - Isakowitz, Steven J,, International Reference to Space Launch Systems Second Edition, AIAA, Washington DC, 1991.
• 61 - Wilson, Andrew, editor,, Jane's/Interavia Space Directory, Jane's Information Group, Coulsdon, Surrey, 1992 et al.