| Discovery[1] | |
|---|---|
| Discovered by | A. Bohrmann |
| Discovery site | Heidelberg Obs. |
| Discovery date | 17 September 1938 |
| Designations | |
| (1470) Carla | |
Named after | Carla Ziegler (discoverer's friend)[2] |
| 1938 SD · 1930 DE 1955 UN | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 78.15 yr (28,546 days) |
| Aphelion | 3.3771AU |
| Perihelion | 2.9416 AU |
| 3.1594 AU | |
| Eccentricity | 0.0689 |
| 5.62yr (2,051 days) | |
| 1.2909° | |
| 0° 10m 31.8s / day | |
| Inclination | 3.2126° |
| 358.43° | |
| 341.84° | |
| Physical characteristics | |
| Dimensions | 31.66±10.19 km[4] 34.092±5.538 km[5] 34.28±0.84 km[6] 36.94 km(derived)[3] 36.97±1.1 km(IRAS:22)[7] |
| 6.15±0.040 h[8] 6.1514±0.0002h[9] 6.154±0.0028 h[10] | |
| 0.0470(derived)[3] 0.0515±0.003(IRAS:22)[7] 0.06±0.09[4] 0.0605±0.0181[5] 0.062±0.003[6] | |
| C[3] | |
| 10.800±0.120(R)[8] · 10.947±0.001(R)[10] · 11.0[5][6] · 11.1[1][3] · 11.18[4] · 11.43±0.35[11] | |
1470 Carla, provisional designation1938 SD, is a carbonaceousasteroid from the outer regions of theasteroid belt, approximately 35 kilometers in diameter.
It was discovered on 17 September 1938, by German astronomerAlfred Bohrmann atHeidelberg Observatory in southwest Germany.[12] It was named after a friend of the discoverer's family, Carla Ziegler.[2]
Carla orbits the Sun at a distance of 2.9–3.4 AU once every 5 years and 7 months (2,051 days). Its orbit has aneccentricity of 0.07 and aninclination of 3° with respect to theecliptic.[1] It was first identified as1930 DE at Heidelberg 1930. The body'sobservation arc, however, begins the night prior to its official discovery observation in 1938.[12]
In September 2011, a rotationallightcurve ofCarla was obtained from photometric observations by astronomerFrederick Pilcher at Organ Mesa Observatory (G50) near Las Cruces, New Mexico. Lightcurve analysis gave arotation period of 6.1514 hours with a brightness amplitude of 0.25magnitude (U=3).[9] in 2014, two additional lightcurves in the R-band, obtained at thePalomar Transient Factory, California, gave a period of 6.15 and 6.154 hours with an amplitude of 0.24 and 0.25, respectively (U=2/2).[8][10]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite, and NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Carla measures between 31.66 and 36.97 kilometers in diameter and its surface has analbedo of 0.051 and 0.062.[4][5][6][7] TheCollaborative Asteroid Lightcurve Link classifies the body as a carbonaceousC-type asteroid, derives an albedo of 0.047 with a diameter of 36.94 kilometers and anabsolute magnitude of 11.1.[3]
Thisminor planet was named in honor of Carla Ziegler, a friend of the Bohrmann family at Heidelberg.[2] The officialnaming citation was published by theMinor Planet Center in October 1954 (M.P.C. 1129).[13]
