| Discovery[1] | |
|---|---|
| Discovered by | A. Mrkos |
| Discovery site | Kleť Obs. |
| Discovery date | 28 August 1984 |
| Designations | |
| (3905) Doppler | |
| Pronunciation | /ˈdɒplər/[2] |
Named after | Christian Doppler (Austrian physicist)[3] |
| 1984 QO · 1980 RP2 | |
| main-belt | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 35.81 yr (13,078 days) |
| Aphelion | 3.2190AU |
| Perihelion | 1.9001 AU |
| 2.5596 AU | |
| Eccentricity | 0.2577 |
| 4.10yr (1,496 days) | |
| 320.23° | |
| 0° 14m 26.52s / day | |
| Inclination | 14.192° |
| 343.32° | |
| 90.823° | |
| Knownsatellites | 1[4][5] |
| Physical characteristics | |
| Dimensions | 8.021±0.047 km[6] |
| 50.8±0.1h[5] | |
| 0.228±0.040[6] | |
| S[5] | |
| 12.6[1][5] | |
3905 Doppler, provisional designation1984 QO, is a stonyasteroid andbinary system from the middle region of theasteroid belt, approximately 8 kilometers in diameter.
The asteroid was discovered on 28 August 1984, by Czech astronomerAntonín Mrkos atKleť Observatory and named after physicistChristian Doppler.[3][7]
Doppler orbits the Sun in thecentral main-belt at a distance of 1.9–3.2 AU once every 4 years and 1 month (1,496 days). Its orbit has aneccentricity of 0.26 and aninclination of 14° with respect to theecliptic.[1] It has been characterized as a commonS-type asteroid.[5]
Aminor-planet moon orbitingDoppler every 50.8 hours (or 2 days, 2 hours, and 48 minutes) was found orbiting the asteroid in 2013. This is fairly longorbital period for a moon of an asteroid of this size.[4] The satellite's orbital period is identical to the primary'srotation period (F-type binary).[5]
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Doppler measures 8.021 kilometers in diameter and its surface has analbedo of 0.228,[6] while theCollaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 8.97 kilometers with anabsolute magnitude of 12.6.[5]
Thisminor planet was named afterChristian Doppler (1803–1853), Austrian physicist in Vienna and well known for theDoppler effect, which he first described in 1842, in his book "Ueber das farbige Licht der Doppelsterne". The naming was proposed byJana Tichá and M. Šolc.[3] The approved naming citation was published by theMinor Planet Center on 28 August 1996 (M.P.C. 27734).[8]
