_Gaby.png) Shape model ofGaby from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 27 February 1930 |
| Designations | |
| (1665) Gaby | |
Named after | Gaby Reinmuth (daughter-in-law of) Karl Reinmuth[2] |
| 1930 DQ · 1941 BC 1949 HS · 1951 WQ 1957 KF | |
| main-belt · (inner)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 87.04 yr (31,793 days) |
| Aphelion | 2.9145AU |
| Perihelion | 1.9128 AU |
| 2.4136 AU | |
| Eccentricity | 0.2075 |
| 3.75yr (1,370 days) | |
| 165.86° | |
| 0° 15m 46.08s / day | |
| Inclination | 10.835° |
| 91.543° | |
| 5.9166° | |
| Physical characteristics | |
| Dimensions | 10.746±0.179 km[4] 10.960±0.021 km[5] 11.009 km[6] 11.01 km(taken)[3] |
| 66±2h[7] 67.905±0.005 h[8] 67.911±0.005 h[9] | |
| 0.2532[6] 0.2681±0.0736[5] 0.278±0.049[4] | |
| Tholen =S[1] · S[3][10] B–V = 0.848[1] U–B = 0.481[1] | |
| 11.85[1][5] · 11.9±0.2[3][6][11] · 12.19±0.97[10] | |
1665 Gaby, provisional designation1930 DQ, is a stonyasteroid and a relativelyslow rotator from the inner regions of theasteroid belt, approximately 11 kilometers in diameter. It was discovered on 27 February 1930, by German astronomerKarl Reinmuth atHeidelberg Observatory in southern Germany.[12] It was later named after Gaby Reinmuth, the discoverer's daughter-in-law.[2]
Gaby orbits the Sun at a distance of 1.9–2.9 AU once every 3 years and 9 months (1,370 days). Its orbit has aneccentricity of 0.21 and aninclination of 11° with respect to theecliptic.[1] Noprecoveries were taken, and no prior identifications were made ofGaby. The body'sobservation arc begins 2 months after its official discovery observation at Heidelberg.[12]
In theTholen classification,Gaby is a commonS-type asteroid.[1]
In February 2005, French amateur astronomerLaurent Bernasconi obtained a rotationallightcurve ofGaby from photometric observations. It gave arotation period of 66 hours with a brightness variation of 0.27magnitude (U=2).[7]
This is a longer-than average rotation, since most minor planets have a period between 2 and 20 hours(seelist). In 2016, concurring sidereal periods of 67.905 and 67.911 hours were obtained from modeled photometric observations derived from the Lowell Photometric Database and other sources (U=n.a.).[8][9]
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Gaby measures between 10.75 and 11.01 kilometers in diameter, and its surface has analbedo between 0.253 and 0.278.[4][5][6] TheCollaborative Asteroid Lightcurve Link adoptsPetr Pravec's revised WISE data with an albedo of 0.2532 and a diameter of 11.01 kilometers using anabsolute magnitude of11.9±0.2.[3][6]
Thisminor planet was named by the discoverer for his daughter-in-law, Gaby Reinmuth.[2] The officialnaming citation was published by theMinor Planet Center on 15 December 1968 (M.P.C. 2901).[13]
