584 Semiramis

584 Semiramis
A three-dimensional model of 584 Semiramis based on its light curve
Discovery
Discovered by A. Kopff
Discovery site Heidelberg
Discovery date 15 January 1906
Designations
MPC designation (584) Semiramis
1906 SY
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 110.26 yr (40272 d)
Aphelion 2.9282 AU (438.05 Gm)
Perihelion 1.8224 AU (272.63 Gm)
2.3753 AU (355.34 Gm)
Eccentricity 0.23276
3.66 yr (1337.1 d)
166.35°
0° 16m 9.228s / day
Inclination 10.718°
282.159°
85.121°
Physical characteristics
Mean radius
 27.005±0.7 km[1]
25.89 ± 1.075 km[2]
Mass (8.23 ± 5.77) × 1017 kg[2]
5.068 h (0.2112 d)
0.1987±0.011
8.71

    584 Semiramis is a minor planet orbiting the Sun within the main asteroid belt. Photometric observations at the Mark Evans Observatory during 2014 gave a rotation period of 5.0689 ± 0.0001 hours. This value is in close agreement with previous studies.[3] The spectrum shows it to be a stony S(IV)-type asteroid.[4]

    References

    1. 1 2 "584 Semiramis (1906 SY)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 7 May 2016.
    2. 1 2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
    3. ↑ Connour, Kyle; Wright, Tyler; French, Linda M. (April 2011), "Upon Further Review: VI. An Examination of Previous Lightcurve Analysis from the Palmer Divide Observatory", The Minor Planet Bulletin, 42 (1): 4, Bibcode:2015MPBu...42....4C
    4. ↑ Sasaki, Takanori; et al. (November 2004), "Mature and Fresh Surfaces on the Newborn Asteroid Karin", The Astrophysical Journal, 615 (2): L161–L164, Bibcode:2004ApJ...615L.161S, doi:10.1086/426431


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