 | |
| Discovery | |
|---|---|
| Discovered by | Hermann Mayer Salomon Goldschmidt |
| Discovery date | 19 September 1857 |
| Designations | |
| (48) Doris | |
| Pronunciation | /ˈdɔːrɪs/[1] |
Named after | Doris |
| Main belt | |
| Adjectives | Dorian/ˈdɔːriən/[2] |
| Orbital characteristics[3] | |
| Epoch 31 December 2006 (JD 2454100.5) | |
| Aphelion | 500.093 Gm (3.343 AU) |
| Perihelion | 430.463 Gm (2.877 AU) |
| 465.278 Gm (3.110AU) | |
| Eccentricity | 0.075 |
| 2003.453 d (5.49a) | |
| 336.191° | |
| Inclination | 6.554° |
| 183.754° | |
| 257.583° | |
| Physical characteristics | |
| Dimensions | 278 km × 142 km[4] |
| 215±3 km[5] 221.8±7.5 km (IRAS)[3] | |
| Flattening | 0.28[a] |
| Mass | (6.9±2.9)×1018 kg[5] (12.3±6.0)×1018 kg[b][6] |
Meandensity | 1.32±0.55 g/cm3[5] 2.12±1.07 g/cm3[6] |
| 11.89 h[3] | |
| 0.066[5] 0.062[7] | |
| C[3] | |
| 7.14[3] | |
48 Doris is one of the largestmain beltasteroids. It was discovered on 19 September 1857 byHermann Goldschmidt from his balcony inParis.
To find a name for the object,Jacques Babinet of theAcademy of Sciences created a shortlist and asked thegeologistÉlie de Beaumont to make the selection. De Beaumont choseDoris, after anOceanid inGreek mythology. Since Doris was discovered on the same night as49 Pales, de Beaumont suggested naming the two "The Twins".[8]
Anoccultation on 19 March 1981 suggested a diameter of 219±25 km.[9] Observations of an occultation on 14 October 1999, using four well-placedchords, indicate an ellipsoid of 278×142 km and that 48 Doris is an extremely irregularly shaped object.[4]
Doris will pass within 0.019 AU ofPallas in June 2132.[10]
48 Doris is a location in the text-based science fiction gameFederation 2.[citation needed]
