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.

291 Alice
A three-dimensional model of 291 Alice based on its light curve
Discovery
Discovered byJohann Palisa
Discovery date25 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 arc124.62 yr (45516 d)
Aphelion2.4273 AU (363.12 Gm)
Perihelion2.01631 AU (301.636 Gm)
2.22182 AU (332.380 Gm)
Eccentricity0.092495
3.31 yr (1209.7 d)
115.293°
0° 17m 51.382s / day
Inclination1.8555°
161.655°
331.580°
Physical characteristics
Dimensions14.97±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.

See also

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References

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  1. ^ a b c d Yeomans, Donald K., "291 Alice", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 11 May 2016.
  2. ^ a b Supplemental IRAS Minor Planet Survey Archived June 23, 2006, at the Wayback Machine
  3. ^ a b 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.
  4. ^ 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.
  5. ^ PDS lightcurve data
  6. ^ "Asteroid Taxonomy". Planetary Science Institute. Retrieved 27 February 2016.
  7. ^ Oey, Julian (December 2006), "Lightcurves analysis of 10 asteroids from Leura Observatory", The Minor Planet Bulletin, 33 (4): 96–99, Bibcode:2006MPBu...33...96O.
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