_Giclas.png) Shape model ofGiclas from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | Indiana University (Indiana Asteroid Program) |
| Discovery site | Goethe Link Obs. |
| Discovery date | 26 January 1960 |
| Designations | |
| (1741) Giclas | |
Named after | Henry Giclas(astronomer)[2] |
| 1960 BC · 1953 UY 1953 VH1 · 1953 XN 1963 YD | |
| main-belt · Koronis[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 63.20 yr (23,084 days) |
| Aphelion | 3.0879AU |
| Perihelion | 2.6812 AU |
| 2.8846 AU | |
| Eccentricity | 0.0705 |
| 4.90yr (1,789 days) | |
| 17.734° | |
| 0° 12m 4.32s / day | |
| Inclination | 2.8876° |
| 55.514° | |
| 338.82° | |
| Physical characteristics | |
| Dimensions | 12.501±0.245 km[4] 13.11±0.18 km[5] 13.60 km(calculated)[3] 15.06±1.04 km[6] |
| 2.92±0.02h[7] 2.938±0.001 h[8][a] 2.943±0.001 h[9] 3.107±0.005 h[10] | |
| 0.24(assumed)[3] 0.260±0.049[5] 0.265±0.039[6] 0.374±0.048 0.3742±0.0483[4] | |
| S[3] V–R =0.456±0.015[9] | |
| 11.11±0.04(R)[9] · 11.2[4][6] · 11.36±0.13[11] · 11.49[5] · 11.5[1][3] | |
1741 Giclas (prov. designation:1960 BC) is a stonyKoronis asteroid from the outer region of theasteroid belt, approximately 13 kilometers in diameter. It was discovered on 26 January 1960, byIU'sIndiana Asteroid Program atGoethe Link Observatory near Brooklyn, Indiana, United States.[12] It is named for astronomerHenry L. Giclas.[2]
TheS-type asteroid is a member of theKoronis family, a group consisting of about 200 known bodies. It orbits the Sun in theouter main-belt at a distance of 2.7–3.1 AU once every 4 years and 11 months (1,789 days). Its orbit has aneccentricity of 0.07 and aninclination of 3° with respect to theecliptic.[1] Its first used observation was taken atGoethe Link Observatory in 1953, extending the body'sobservation arc by 7 years prior to its official discovery observation.[12]
Between 2004 and 2014, severallightcurves[a] ofGiclas gave arotation period between 2.92 and 3.107 hours with an brightness variation between 0.10 and 0.15magnitude (U=3-/3/3/2).[7][8][9][10]
According to the surveys carried out by the JapaneseAkari satellite and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Giclas measures 12.50 and 15.06 kilometers in diameter, and its surface has analbedo in the range of 0.260 to 0.374.[4][5][6]
TheCollaborative Asteroid Lightcurve Link assumes an albedo of 0.24 and calculates a diameter of 13.60 kilometers with anabsolute magnitude of 11.5.[3]
Thisminor planet was named in honour of American astronomerHenry Lee Giclas (1910–2007), longtime staff member of theLowell Observatory in Flagstaff, Arizona, where he discovered 17 minor planets and the comet84P/Giclas. Giclas responsibility included the programs of minor planet positions and stellar proper motions, using the13-inch Lawrence Lowell Telescope.[2] The officialnaming citation was published by theMinor Planet Center on 20 February 1976 (M.P.C. 3934).[13]
