Athena I
Athena 1 rocket launching from Kodiak Island.jpg
Launch of an Athena I on the Kodiak Star mission.
FunctionSmall expendable launch system
ManufacturerLockheed Martin
Alliant Techsystems
Country of originUnited States
Size
Height18.9 metres (62 ft)
Diameter2.36 metres (7 ft 9 in)
Mass66,300 kilograms (146,200 lb)
StagesThree
Capacity
Payload to LEO
Mass820 kilograms (1,810 lb)
Payload to SSO
Mass360 kilograms (790 lb)
Associated rockets
FamilyAthena
Based on
Derivative workAthena II
ComparableFalcon 1
Minotaur IV
Taurus
Launch history
StatusRetired
Launch sites
Total launches4
Success(es)3
Failure(s)1
First flight15 August 1995
Last flight30 September 2001
First stage – Castor 120
Powered by1 solid
Maximum thrust1,900 kilonewtons (430,000 lbf)
Specific impulse280 sec
Burn time83 seconds
PropellantHTPB
Second stage – Orbus 21D
Powered by1 solid
Maximum thrust189.2 kilonewtons (42,500 lbf)
Specific impulse293 sec
Burn time150 seconds
PropellantHTPB
Third stage – OAM
Powered by4 MR-107
Maximum thrust882 newtons (198 lbf)
Specific impulse222 sec
Burn time1,500 seconds
PropellantHydrazine

The Athena I, known as the Lockheed Launch Vehicle (LLV) at the time of its first flight and Lockheed Martin Launch Vehicle (LMLV) at the time of its second flight,[1] was an American small expendable launch system which was used for four launches between 1995 and 2001. It is a member of the Athena family of rockets, along with the larger Athena II.[2]

The Athena I is a three-stage rocket, consisting of solid first and second stages, and a monopropellant liquid-fuelled third stage. The first stage is a Castor 120, which is also used on some versions of the Taurus rocket. An Orbus 21D motor was used as the second stage on launches up to 2001.[3] The third stage is an Orbital Adjustment Module, fuelled by hydrazine and propelled by four MR-107 engines, which is used for final insertion.[4][5]

Prior to its retirement in 2001, Athena I launches were made from Space Launch Complex 6 at Vandenberg Air Force Base, Launch Complex 46 at Spaceport Florida, and Pad 1 of the Kodiak Launch Complex.

Four Athena I launches have been conducted, with one failure. Its maiden flight was conducted from SLC-6 at Vandenberg, and lifted off at 22:30 UTC on 15 August 1995. It was intended to place GemStar-1 into orbit, however the rocket was destroyed by the range safety officer after the failure of its thrust vectoring system resulted in a loss of control. The launch was the first from SLC-6, which had originally been built for the Titan III rocket for launches of the Manned Orbital Laboratory, and was later rebuilt for polar orbit Space Shuttle launches. Both MOL and polar Shuttle flights were cancelled before any launches were made from SLC-6. The next Athena I launch was on 23 August 1997, and successfully placed the Lewis satellite into orbit for NASA. This launch also took place from SLC-6 at Vandenberg. The third Athena I launch was from LC-46 at Spaceport Florida, and took place on 27 January 1999. The payload, ROCSAT-1, was the first satellite to be operated by the Republic of China. The fourth launch, which was conducted on 30 September 2001, was the first orbital launch to be made from Kodiak Island. Known as the Kodiak Star mission,[6] it successfully placed the Starshine 3, Picosat 9, PCSat and Sapphire satellites into orbit.[7]

See also

References

  1. ^ Wade, Mark. "Athena". Encyclopedia Astronautica. Archived from the original on 29 March 2010. Retrieved 26 March 2010.
  2. ^ "Lockheed Martin and ATK Announce 2nd Generation Athena Launch Vehicles". Lockheed Martin. 25 March 2010. Archived from the original on 28 March 2010. Retrieved 26 March 2010.
  3. ^ "Taurus II" (PDF). Orbital Sciences Corporation. Archived (PDF) from the original on 26 March 2010. Retrieved 26 March 2010.
  4. ^ Krebs, Gunter. "Athena (LLV / LMLV)". Gunter's Space Page. Archived from the original on 13 February 2010. Retrieved 26 March 2010.
  5. ^ Wade, Mark. "OAM". Encyclopedia Astronautica. Archived from the original on 1 April 2010. Retrieved 26 March 2010.
  6. ^ "Athena I Kodiak Star Launch". NASA. 10 September 2001. Archived from the original on 27 May 2010. Retrieved 26 March 2010.
  7. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Archived from the original on 7 May 2010. Retrieved 26 March 2010.