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Atlas V 541

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Status: Active. First Launch: 2011-11-26. Last Launch: 2018-03-01. Number: 7 .

• MSL - . Mass: 3,839 kg (8,463 lb). Nation: USA. Class: Mars. Type: Mars rover. Spacecraft Bus: Mars Rovers. Spacecraft: MSL. Decay Date: 2012-08-06 . USAF Sat Cat: 37936 . COSPAR: 2011-070A. Apogee: 319 km (198 mi). Perigee: 161 km (100 mi). Inclination: 28.90 deg. Period: 89.30 min. Mars Science Laboratory; 899 kg Curiosity Rover to be landed on Mars surface in August 2012..

• USA 250 - . Payload: NROL-67. Mass: 3,600 kg (7,900 lb). Nation: USA. Class: Surveillance. Type: SIGINT. Spacecraft: Mercury ELINT. USAF Sat Cat: 39652 . COSPAR: 2014-020A. Apogee: 35,790 km (22,230 mi). Perigee: 35,780 km (22,230 mi). Inclination: 0.00 deg. Period: 1,436.00 min. It appeared likely that the Centaur stage made three burns to deploy the USA 250 payload in geosynchronous orbit. The payload was suspected to be a large NRO signals intelligence satellite..

• USA 259 - . Nation: USA. Class: Surveillance. Type: SIGINT. Spacecraft: Trumpet Follow-on. USAF Sat Cat: 40344 . COSPAR: 2014-081A. Apogee: 38,204 km (23,738 mi). Perigee: 2,157 km (1,340 mi). Inclination: 62.80 deg.

  Probably a signals intelligence satellite with an attached SBIRS-HEO early warning sensor as a secondary payload. This mission used the new RL-10C-1 upper stage engine for the first time (refurbished from Delta IV RL-10B-2 engines; replacing the RL10A-4 used previously)

• USA 269 - . Payload: QUASAR. Nation: USA. Class: Communications. Type: Communications satellite. Spacecraft: Quasar. USAF Sat Cat: 41724 . COSPAR: 2016-047A. Apogee: 35,996 km (22,366 mi). Perigee: 35,576 km (22,105 mi). Inclination: 5.00 deg.

  NROL-61 mission was launched on Atlas AV-065 into a geostationary transfer orbit. The satellite was thought to be an NRO (National Reconnaissance Office) data relay communications satellite in the QUASAR series, although there was a chance that it instead had a signals intelligence payload. The payload made orbital maneuvers to raise its perigee, and hobbyists tracked the satellite in geostationary orbit at 92 deg E, over the Indian Ocean.

• GOES 16 - . Payload: GOES R. Nation: USA. Class: Earth. Type: Weather satellite. Spacecraft: AS 2100. USAF Sat Cat: 41866 . COSPAR: 2016-071A. Apogee: 35,269 km (21,915 mi). Perigee: 8,157 km (5,068 mi). Inclination: 10.60 deg.

  Geostationary Operational Environmental Satellite R, which became GOES 16 when operational, was the first in a new series of Lockheed-Martin-built GOES weather satellites for NOAA. The satellite mass was 2857 kg dry, 5192 kg when full of propellant. GOES-R carried the Advanced Baseline Imager, a new camera similar in capabilities to those on the Japanese Himawari 8/9 series. Also aboard were the Geostationary Lightning Mapper, a Space Environment suite, a Solar Ultraviolet Imager, an EUV/X-Ray Irradiance Sensor, a Search and Rescue comm payload, and comm payloads to relay weather data.

• USA 278 - . Payload: RAVEN-7?/HEO-4. Nation: USA. USAF Sat Cat: 42941 . COSPAR: 2017-056A. See Trumpet 7 (USA 278, NROL 42, SBIRS HEO-4). ..

• GOES 17 - . Payload: GOES S. Nation: USA. USAF Sat Cat: 43226 . COSPAR: 2018-022A. Apogee: 35,800 km (22,200 mi). Perigee: 35,772 km (22,227 mi). Inclination: 0.0300 deg. Period: 1,436.07 min. See GOES 17 (GOES S). ..