Discovery | |
---|---|
Discovered by | A. Borrelly |
Discovery date | 13 January 1877 |
Designations | |
(171) Ophelia | |
Pronunciation | /oʊˈfiːliə/[1] |
A877 AB | |
Main belt (Themis) | |
Adjectives | Ophelian /ɒˈfiːliən/[2] |
Orbital characteristics[3] | |
Epoch 31 July 2016 (JD 2457600.5) | |
Uncertainty parameter 0 | |
Observation arc | 122.15 yr (44615 d) |
Aphelion | 3.5476 AU (530.71 Gm) |
Perihelion | 2.7175 AU (406.53 Gm) |
3.1326 AU (468.63 Gm) | |
Eccentricity | 0.13249 |
5.54 yr (2025.1 d) | |
11.164° | |
0° 10m 39.972s / day | |
Inclination | 2.5461° |
100.52° | |
56.849° | |
Physical characteristics | |
130.808±1.483 km[3] | |
Mass | (1.064 ± 0.535/0.351)×1018 kg[4] |
Mean density | 1.755 ± 0.883/0.579 g/cm3[4][a] |
6.66535 h (0.277723 d) | |
0.0615±0.004 | |
C | |
8.31 | |
171 Ophelia is a large, dark Themistian asteroid[5] that was discovered by French astronomer Alphonse Borrelly on 13 January 1877, and named after Ophelia in Shakespeare's Hamlet.[6]
This asteroid is a member of the Themis family of asteroids that share similar orbital elements.[7] It probably has a primitive composition, similar to that of the carbonaceous chondrite meteorites.
A 1979 study of the Algol-like light curve produced by this asteroid concluded that it was possible to model the brightness variation by assuming a binary system with a circular orbit, a period of 13.146 hours, and an inclination of 15° to the line of sight from the Earth.[8] Photometric observations of this asteroid at the Leura Observatory in Leura, Australia during 2006 gave a rotation period of 6.6666 ± 0.0002 hours and a brightness variation of 0.50 ± 0.02 in magnitude. This is in agreement with previous studies.[9]
Ophelia is also the name of a moon of Uranus.
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