_Ophelia.png) 3D convex shape model of 171 Ophelia | |
| Discovery | |
|---|---|
| Discovered by | A. Borrelly |
| Discovery date | 13 January 1877 |
| Designations | |
| MPC designation | (171) Ophelia |
| Pronunciation | /oʊˈfiːliə/ |
| Alternative designations | A877 AB |
| Minor planet category | Main belt (Themis) |
| Adjectives | Ophelian /ɒˈfiːliən/ |
| Orbital characteristics | |
| 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) |
| Semi-major axis | 3.1326 AU (468.63 Gm) |
| Eccentricity | 0.13249 |
| Orbital period (sidereal) | 5.54 yr (2025.1 d) |
| Mean anomaly | 11.164° |
| Mean motion | 0° 10 39.972 / day |
| Inclination | 2.5461° |
| Longitude of ascending node | 100.52° |
| Argument of perihelion | 56.849° |
| Physical characteristics | |
| Mean diameter | 130.808±1.483 km |
| Mass | (1.064 ± 0.535/0.351)×10 kg |
| Mean density | 1.755 ± 0.883/0.579 g/cm |
| Synodic rotation period | 6.66535 h (0.277723 d) |
| Geometric albedo | 0.0615±0.004 |
| Spectral type | C |
| Absolute magnitude (H) | 8.31 |
171 Ophelia is a large, dark Themistian asteroid that was discovered by French astronomer Alphonse Borrelly on 13 January 1877, and named after Ophelia in Shakespeare's Hamlet.
This asteroid is a member of the Themis family of asteroids that share similar orbital elements. 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. 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.
Ophelia is also the name of a moon of Uranus.
Notes
- Assuming a diameter of 105.01 ± 3.54 km.
References
- Benjamin Smith (1903) The Century Dictionary and Cyclopedia
- "Ophelian". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
- ^ Yeomans, Donald K., "171 Ophelia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 6 May 2016.
- ^ Fienga, A.; Avdellidou, C.; Hanuš, J. (February 2020). "Asteroid masses obtained with INPOP planetary ephemerides". Monthly Notices of the Royal Astronomical Society. 492 (1). doi:10.1093/mnras/stz3407.
- Florczak, M.; et al. (February 1999). "A spectroscopic study of the THEMIS family". Astronomy and Astrophysics Supplement. 134 (3): 463–471. Bibcode:1999A&AS..134..463F. doi:10.1051/aas:1999150.
- Schmadel, Lutz (2003). Dictionary of Minor Planet Names. Springer Science & Business Media. p. 30. ISBN 9783540002383. Retrieved 17 July 2019.
- Moore, Patrick; Rees, Robin, eds. (2011), Patrick Moore's Data Book of Astronomy (2nd ed.), Cambridge University Press, p. 165, ISBN 9781139495226.
- Wijesinghe, M. P.; Tedesco, E. F. (December 1979), "A test of plausibility of eclipsing binary asteroids", Icarus, 40 (3): 383–393, Bibcode:1979Icar...40..383W, doi:10.1016/0019-1035(79)90031-9.
- Oey, Julian (December 2006), "Lightcurves analysis of 10 asteroids from Leura Observatory", The Minor Planet Bulletin, 33 (4): 96–99, Bibcode:2006MPBu...33...96O.
External links
- 171 Ophelia at AstDyS-2, Asteroids—Dynamic Site
- 171 Ophelia at the JPL Small-Body Database
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