291 Alice
Alice (minor planet designation: 291 Alice) is a stony background asteroid from the inner region of the asteroid belt. It was discovered by Johann Palisa on 25 April 1890 at the Vienna Observatory.
.png.webp) A three-dimensional model of 291 Alice based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 25 April 1890 |
| Designations | |
| (291) Alice | |
| A890 HA, 1954 UJ3 | |
| main-belt | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 124.62 yr (45516 d) |
| Aphelion | 2.4273 AU (363.12 Gm) |
| Perihelion | 2.01631 AU (301.636 Gm) |
| 2.22182 AU (332.380 Gm) | |
| Eccentricity | 0.092495 |
| 3.31 yr (1209.7 d) | |
| 115.293° | |
| 0° 17m 51.382s / day | |
| Inclination | 1.8555° |
| 161.655° | |
| 331.580° | |
| Physical characteristics | |
| Dimensions | 14.97±1.1 km [1] 19×12×11 km [2][3] |
| Mass | ~ |
Mean density | ~2.7 g/cm3[4] |
| 4.313 h (0.1797 d) [1] 0.180 d (4.32 h) [5] | |
| 0.2075±0.033 [1] 0.208 [2] | |
| S [6] | |
| 11.45 | |
Photometric observations of this asteroid at the Leura Observatory in Leura, Australia during 2006 gave a rotation period of 4.313 ± 0.002 hours and a brightness variation of 0.20 ± 0.02 in magnitude. This result is in agreement with previous studies.[7] Lightcurve analysis indicates that Alice's pole points towards either ecliptic coordinates (β, λ) = (55°, 65°) or (β, λ) = (55°, 245°) with a 10° uncertainty.[3] This gives an axial tilt of about 35° in both cases.
References
- Yeomans, Donald K., "291 Alice", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 11 May 2016.
- Supplemental IRAS Minor Planet Survey Archived June 23, 2006, at the Wayback Machine
- A. Kryszczyńska; et al. (1996). "CCD Photometry of Seven Asteroids: New Spin Axis and Shape Determinations". Icarus. 124 (1): 134–140. Bibcode:1996Icar..124..134K. doi:10.1006/icar.1996.0194.
- G. A. Krasinsky; et al. (2002). "Hidden Mass in the Asteroid Belt". Icarus. 158 (1): 98–105. Bibcode:2002Icar..158...98K. doi:10.1006/icar.2002.6837.
- PDS lightcurve data
- "Asteroid Taxonomy". Planetary Science Institute. Retrieved 27 February 2016.
- Oey, Julian (December 2006), "Lightcurves analysis of 10 asteroids from Leura Observatory", The Minor Planet Bulletin, 33 (4): 96–99, Bibcode:2006MPBu...33...96O.
See also
External links
- 291 Alice at AstDyS-2, Asteroids—Dynamic Site
- 291 Alice at the JPL Small-Body Database
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