| Discovery[1] | |
|---|---|
| Discovered by | C. Torres S. Cofré |
| Discovery site | Cerro El Roble Stn. |
| Discovery date | 18 July 1968 |
| Designations | |
| (1992) Galvarino | |
Named after | Galvarino(Mapuche warrior)[2] |
| 1968 OD | |
| main-belt · Eos[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 48.69 yr (17,783 days) |
| Aphelion | 3.1367AU |
| Perihelion | 2.8468 AU |
| 2.9917 AU | |
| Eccentricity | 0.0485 |
| 5.17yr (1,890 days) | |
| 197.49° | |
| 0° 11m 25.8s / day | |
| Inclination | 10.570° |
| 182.59° | |
| 98.241° | |
| Physical characteristics | |
| Dimensions | 9.597±0.105 km[4][5] 10.24 km(calculated)[3] |
| 7.004h[6] | |
| 0.14(assumed)[3] 0.145±0.018[4][5] | |
| M[4] · L[7] · S[3] | |
| 12.7[1][3] · 12.8[4] · 12.91±0.22[7] | |
1992 Galvarino, provisional designation1968 OD, is an Eoanasteroid from the outer region of theasteroid belt, approximately 10 kilometers in diameter.
It was discovered on 18 July 1968, by Chilean astronomersCarlos Torres andS. Cofre at theCerro El Roble Station of Chile'sNational Astronomical Observatory, and named after the indigenous warriorGalvarino.[2][8]
Galvarino is a stonyS-type asteroid and a member of theEos family, an orbital group of more than 4,000 asteroids, which are well known for mostly being of stony composition with a relatively highalbedo. It is also classified as aM- andL-type asteroids byWISE andPanSTARRS, respectively.[4][7]
It orbits the Sun in theouter main-belt at a distance of 2.8–3.1 AU once every 5 years and 2 months (1,890 days). Its orbit has aneccentricity of 0.05 and aninclination of 11° with respect to theecliptic.[1] Itsobservation arc begins with its official discovery observation in 1968, as noprecoveries and no previous identifications were made.[8]
As of 2016, a single rotationallightcurve ofGalvarino has been obtained. The photometric observations were made in the 1990s, giving a well-definedrotation period of 7.004 hours with a brightness variation of 0.6magnitude (U=3).[6]
According to the surveys carried out by NASA's WISE satellite with its subsequentNEOWISE mission, the asteroid measures 9.6 kilometers in diameter and its surface has analbedo of 0.145,[4][5] while theCollaborative Asteroid Lightcurve Link assumes an albedo of 0.14 and calculates a diameter of 10.2 kilometers with anabsolute magnitude of 12.7.[3]
Thisminor planet was named after the indigenous warriorGalvarino, the heroic figure during theArauco War, a long-running conflict between colonial Spaniards and theMapuche people of the 16th century in what is now Chile.
He was condemned by the Spanish soldiers to have his hands cut off and then to be freed as a living lesson to other Indians. Since his request for death was not granted, he promised revenge. He continued to fight the conquerors until recaptured and condemned to the gallows.[2] The approved naming citation was published by theMinor Planet Center on 1 June 1980 (M.P.C. 5358).[9]
