_Golia.png) Shape model ofGolia from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | H. van Gent |
| Discovery site | Johannesburg Obs. (Leiden Southern Station) |
| Discovery date | 22 April 1930 |
| Designations | |
| (1226) Golia | |
Named after | Jacobus Golius (Dutch mathematician)[2] |
| 1930 HL · 1957 WN | |
| main-belt · (middle)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 87.20 yr (31,851 days) |
| Aphelion | 2.8736AU |
| Perihelion | 2.2927 AU |
| 2.5832 AU | |
| Eccentricity | 0.1124 |
| 4.15yr (1,516 days) | |
| 57.385° | |
| 0° 14m 14.64s / day | |
| Inclination | 9.8470° |
| 17.486° | |
| 139.78° | |
| Physical characteristics | |
| Dimensions | 11.679±0.158 km[4] 12.179±0.147 km[5] 15.92 km(derived)[3] 16.39±1.5 km[6] |
| 4.0910±0.0005h[7] 4.097 h[8] | |
| 0.1008(derived)[3] 0.1724±0.0240[5] 0.187±0.023[4] 0.2388±0.052[6] | |
| M[5] · S[3] | |
| 11.10[6] · 11.809±0.003(R)[7] · 12.1[3][5] · 12.2[1] · 12.39±0.61[9] | |
1226 Golia, provisional designation1930 HL, is a metallicasteroid from the central region of theasteroid belt, approximately 15 kilometers in diameter. It was discovered on 22 April 1930, by Dutch astronomerHendrik van Gent at Leiden Southern Station, annex to theJohannesburg Observatory in South Africa.[10] It is named forJacobus Golius.[2]
Golia orbits the Sun in thecentral main-belt at a distance of 2.3–2.9 AU once every 4 years and 2 months (1,516 days). Its orbit has aneccentricity of 0.11 and aninclination of 10° with respect to theecliptic.[1] The body'sobservation arc begins at Johannesburg one night after its official discovery observation, with noprecoveries taken and no prior identifications made.[10]
Golia has been characterized as a metallicM-type asteroid by theWide-field Infrared Survey Explorer (WISE).[5]
In March 1992, the first reliable rotationallight curve ofGolia was obtained by Italian astronomer Mario Di Martino using theESO 1-metre telescope atLa Silla in northern Chile. Analysis gave a well-definedrotation period of 4.097 hours with a change in brightness of 0.35magnitude (U=3).[8] Another light curve was obtained from photometric observations in the R-band at thePalomar Transient Factory in October 2011, giving a period of 4.0910 hours and an amplitude of 0.24 magnitude (U=2).[7]
According to preliminary results by theNEOWISE mission of NASA's WISE space telescope,Golia measures 11.68 and 12.18 kilometers in diameter, and its surface has analbedo of 0.187 and 0.172, respectively,[4][5] while the Infrared Astronomical SatelliteIRAS gives a diameter of 16.39 kilometers and an albedo of 0.239.[6] TheCollaborative Asteroid Lightcurve Link considersGolia to be ofstony composition, deriving an albedo of 0.1008 and a diameter of 15.92 kilometers, using anabsolute magnitude of 12.1.[3]
Thisminor planet was named after Dutch professor of astronomyJakob Gool (1596–1667), also known as Jacobus Golius, who founded theLeiden Observatory in 1633. He was a mathematician andorientalist, who translated Arabic texts into Latin including the work of 9th-century Muslim astronomerAl-Farghani. He was also a teacher of French philosopherRené Descartes, after whom the minor planet3587 Descartes is named.[2] The official naming citation was compiled byLutz Schmadel for theDictionary of Minor Planet Names based on a private communication withIngrid van Houten-Groeneveld at Leiden.[2]
