3361 Orpheus
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3361 Orpheus (1982 HR) is an Apollo asteroid that was discovered on 24 April 1982 by Carlos Torres at Cerro El Roble Astronomical Station. Its eccentric orbit crosses that of Mars and Earth, and approaches Venus as well. From 1900 to 2100 it passes closer than Script error: No such module "convert". to Venus, 11; Earth, 33; and Mars, 14 times. It passed by Earth at a distance of about Script error: No such module "convert". in 1937, 1978, 1982, and 2021, and will do so again in 2025.[1]
3361 Orpheus is a potentially hazardous asteroid (PHA) because its minimum orbit intersection distance (MOID) is less than Script error: No such module "convert". and its diameter is greater than Script error: No such module "convert".. The Earth-MOID is Script error: No such module "convert"..[1] With an observation arc of 36 years, the orbit is well-determined for the next several hundred years.
The orbital solution includes non-gravitational forces.[1]
| Date | JPL SBDB nominal geocentric distance |
uncertainty region (3-sigma) |
|---|---|---|
| 2021-11-21 | Script error: No such module "val". | ± 18 km |
| 2198-04-16 | Script error: No such module "val". | ± 129 km[2] |
Missions
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3361 Orpheus had been one of the originally proposed targets for the Near Earth Asteroid Rendezvous (NEAR) mission.
The proposed AIDA mission's spacecraft, Double Asteroid Redirection Test was a fly-by observation of 3361 Orpheus during its trajectory to asteroid 65803 Didymos but later cancelled.[3]Script error: No such module "Unsubst".
References
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External links
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- Template:PAGENAMEBASE at the JPL Small-Body DatabaseTemplate:EditAtWikidata
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