Delta 4925

The Delta 4000 series used more powerful Castor 4A strap-ons, but the old Extended Long Tank core with MB-3 engine. Only two of these were launched.

Manufacturer: Douglas. Launches: 2. Success Rate: 100.00%. First Launch Date: 1989-08-27. Last Launch Date: 1990-06-12. Launch data is: complete. LEO Payload: 3,400 kg (7,400 lb). to: 185 km Orbit. Payload: 1,200 kg (2,600 lb). to a: Geosynchronous transfer trajectory. Apogee: 40,000 km (24,000 mi). Associated Spacecraft: HS 376, Insat 1. Liftoff Thrust: 3,468.800 kN (779,817 lbf). Total Mass: 200,740 kg (442,550 lb). Core Diameter: 2.44 m (8.00 ft). Total Length: 34.00 m (111.00 ft). Flyaway Unit Cost $: 34.220 million. in: 1985 unit dollars.

4 stage vehicle consisting of 9 x Castor 4A + 1 x ELT Thor /MB-3 + 1 x Delta K + 1 x Star 48B with 2.4 m (8 foot) diameter fairing)

LEO Payload: 3,400 kg (7,400 lb). to: 185 km Orbit. Payload: 1,200 kg (2,600 lb). to a: Geosynchronous transfer trajectory. Apogee: 40,000 km (24,000 mi). Liftoff Thrust: 3,468.800 kN (779,817 lbf). Total Mass: 200,740 kg (442,550 lb). Core Diameter: 2.44 m (8.00 ft). Total Length: 34.00 m (111.00 ft). Flyaway Unit Cost $: 34.220 million. in: 1985 unit dollars.

• Stage Number: 0. 9 x Stage: Castor 4A. Gross Mass: 11,743 kg (25,888 lb). Empty Mass: 1,529 kg (3,370 lb). Thrust (vac): 478.309 kN (107,528 lbf). Isp: 266 sec. Burn time: 56 sec. Isp(sl): 237 sec. Diameter: 1.02 m (3.34 ft). Span: 1.02 m (3.34 ft). Length: 9.12 m (29.92 ft). Propellants: Solid. No Engines: 1. Engine: Castor 4A. Status: Out of production.

• Stage Number: 1. 1 x Stage: Delta Thor ELT. Gross Mass: 84,067 kg (185,336 lb). Empty Mass: 4,059 kg (8,948 lb). Thrust (vac): 1,030.208 kN (231,600 lbf). Isp: 296 sec. Burn time: 222 sec. Isp(sl): 262 sec. Diameter: 2.44 m (8.00 ft). Span: 2.44 m (8.00 ft). Length: 22.40 m (73.40 ft). Propellants: Lox/Kerosene. No Engines: 1. Engine: RS-27. Other designations: Extended Length Tank Thor. Status: Out of production.

• Stage Number: 2. 1 x Stage: Delta K. Gross Mass: 6,954 kg (15,330 lb). Empty Mass: 950 kg (2,090 lb). Thrust (vac): 43.630 kN (9,808 lbf). Isp: 319 sec. Burn time: 431 sec. Diameter: 1.70 m (5.50 ft). Span: 2.40 m (7.80 ft). Length: 5.89 m (19.32 ft). Propellants: N2O4/Aerozine-50. No Engines: 1. Engine: AJ10-118K.

1989 August 27 - 22:59 GMT - Launch Site: Cape Canaveral. Launch Complex: LC17. Launch Pad: LC17B. Launch Vehicle: Delta 4000. Model: Delta 4925-8. LV Configuration: Delta 4925-8 D187.

• BSB-1A Nation: UK. Program: BSB. Payload: Marco Polo 1. Mass: 1,233 kg (2,718 lb). Class: Communications. Spacecraft: HS 376. Agency: BSB. Perigee: 35,782 km (22,233 mi). Apogee: 35,795 km (22,241 mi). Inclination: 0.10 deg. Period: 1,436.20 min. COSPAR: 1989-067A. USAF Sat Cat: 20193. British DBS; 31 deg W. Direct broadcasting system. Expected operational life, 10 years. Owner/operator: British Satellite Broadcasting Ltd, The Marcopolo Building, Chelsea Bridge, Queenstown Rd, London SW8 4NQ. Positioned in geosynchronous orbit at 31 deg W in 1989-1993; 5 deg E in 1994-2000; 13 deg W in 2000. As of 31 August 2001 located at 12.98 deg W drifting at 0.008 deg W per day. As of 2007 Mar 9 located at 45.02W drifting at 3.908W degrees per day.References: 1, 2, 5, 6.

• Insat-1D; Insat 1D Nation: India. Program: Insat. Payload: Insat 1D. Mass: 1,190 kg (2,620 lb). Class: Communications. Spacecraft: Insat 1. Agency: ISRO. Perigee: 35,729 km (22,200 mi). Apogee: 35,851 km (22,276 mi). Inclination: 3.70 deg. Period: 1,436.30 min. COSPAR: 1990-051A. USAF Sat Cat: 20643. Also performed Indian domestic communications tasks; 83.1 E. Operational multi-purpose satellite for telecommunications, meteorological imaging and data relay, radio and television programme distribution and direct television broadcasting for community reception. Orbital position 83 deg E. Also registered as 1990-5 1A in ST/SG/SER.E/250 by the United States, with category B and orbital parameters 1426.3 min, 35768 x 35811 km x 0.2 deg. Positioned in geosynchronous orbit at 83 deg E in 1990-1999; 74 deg E in 1999-2000 As of 5 September 2001 located at 73.85 deg E drifting at 0.000 deg E per day. As of 2007 Mar 10 located at 71.63E drifting at 0.039E degrees per day.References: 1, 2, 5, 6.

• McDowell, Jonathan, Jonathan's Space Home Page, Harvard University, 1997-present. Jonathan McDowell's complete on-line listing of all objects orbited and over 20,000 rocket launches Accessed at: http://www.planet4589.org/jsr.html.

• Isakowitz, Steven J,, International Reference to Space Launch Systems Second Edition, AIAA, Washington DC, 1991 (succeeded by 2000 edition). ISBN: 1563473534. Superseded by the later editions. More at amazon.com...

• Wilson, Andrew, editor,, Jane's/Interavia Space Directory, Jane's Information Group, Coulsdon, Surrey, 1992 et al. ISBN: 0710618107. The most comprehensive source of information for current space projects. Too expensive for human beings and most libraries. More at amazon.com...