A three-dimensional model of 291 Alice based on its light curve
Discovery
Discovered by
Johann Palisa
Discovery date
25 April 1890
Designations
MPC designation
(291) Alice
Alternative designations
A890 HA, 1954 UJ3
Minor planet category
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)
Semi-major axis
2.22182 AU (332.380 Gm)
Eccentricity
0.092495
Orbital period (sidereal)
3.31 yr (1209.7 d)
Mean anomaly
115.293°
Mean motion
0° 17m 51.382s / day
Inclination
1.8555°
Longitude of ascending node
161.655°
Argument of perihelion
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]
Synodic rotation period
4.313 h (0.1797 d) [1] 0.180 d (4.32 h) [5]
Geometric albedo
0.2075±0.033[1] 0.208 [2]
Spectral type
S [6]
Absolute magnitude (H)
11.45
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.
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.
^ abcdCite error: The named reference JPL was invoked but never defined (see the help page).
^ abSupplemental IRAS Minor Planet Survey Archived June 23, 2006, at the Wayback Machine
^ abA. 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.
^Cite error: The named reference Oey2006 was invoked but never defined (see the help page).
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