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Delta 6920-10
Part of Thor Family
Three stage vehicle consisting of 9 x Castor 4A + 1 x EELT Thor/RS-27+ 1 x Delta K with 3.05 m (10 foot) diameter fairing

AKA: Delta 6920-X. Status: Retired 1992. First Launch: 1990-06-01. Last Launch: 1992-06-07. Number: 2 . Thrust: 3,790.00 kN (852,020 lbf). Gross mass: 219,000 kg (482,000 lb). Height: 39.00 m (127.00 ft). Diameter: 2.44 m (8.00 ft). Apogee: 1,000 km (600 mi).



Family: orbital launch vehicle. Country: USA. Engines: RS-27A. Spacecraft: ROSAT, EUVE. Launch Sites: Cape Canaveral, Cape Canaveral LC17A. Stages: Delta Thor XLT-C, Castor 4A engine, Delta K. Agency: Douglas.

1990 June 1 - . 21:48 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Thor. Launch Vehicle: Delta 6920-10.
  • ROSAT - . Mass: 2,426 kg (5,348 lb). Nation: Germany. Agency: DLR. Class: Astronomy. Type: X-ray astronomy satellite. Spacecraft: ROSAT. Decay Date: 2011-10-23 . USAF Sat Cat: 20638 . COSPAR: 1990-049A. Apogee: 554 km (344 mi). Perigee: 539 km (334 mi). Inclination: 53.0000 deg. Period: 95.60 min. West German extreme UV, X-ray telescope; all-sky survey..

1992 June 7 - . 16:40 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC17A. LV Family: Thor. Launch Vehicle: Delta 6920-10.
  • EUVE - . Mass: 3,275 kg (7,220 lb). Nation: USA. Agency: NASA Greenbelt. Class: Astronomy. Type: X-ray astronomy satellite. Spacecraft Bus: MMS. Spacecraft: EUVE. Decay Date: 2002-01-31 . USAF Sat Cat: 21987 . COSPAR: 1992-031A. Apogee: 524 km (325 mi). Perigee: 510 km (310 mi). Inclination: 28.4000 deg. Period: 95.00 min.

    Extreme Ultra-Violet Explorer; mapped galactic EUV sources. The Extreme Ultraviolet Explorer was switched off on February 2, 2001. NASA decided to terminate funding for the mission, even though the spacecraft was still operating well. The sky survey was completed in January 1993 and after that the EUVE was used by guest astronomers for observations of specific targets. The final observations were made on January 26, 2001. After end-of-life tests of the never-used backup high voltage supplies and checking the remaining battery capacity, EUVE was stabilized pointing away from the Sun and sent into safehold at 2359 GMT on January 31. The transmitters were commanded off on February 2.



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