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584 Semiramis

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Main-belt asteroid

584 Semiramis
Discovery
A three-dimensional model of 584 Semiramis based on its light curve
Discovered by	A. Kopff
Discovery site	Heidelberg
Discovery date	15 January 1906
Designations
MPC designation	(584) Semiramis
Pronunciation	/sɪˈmɪrəmɪs/^[1]
Named after	Semiramis
Alternative designations	1906 SY
Orbital characteristics^[2]
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)
Semi-major axis	2.3753 AU (355.34 Gm)
Eccentricity	0.23276
Orbital period (sidereal)	3.66yr (1337.1d)
Mean anomaly	166.35°
Mean motion	0° 16^m 9.228^s / day
Inclination	10.718°
Longitude of ascending node	282.159°
Argument of perihelion	85.121°
Physical characteristics
Mean radius	27.005±0.7km^[2] 25.89 ± 1.075 km^[3]
Mass	(8.23 ± 5.77) × 10¹⁷ kg^[3]
Synodic rotation period	5.068 h (0.2112 d)
Geometric albedo	0.1987±0.011
Absolute magnitude (H)	8.71

584 Semiramis is aminor planet orbiting theSun within the mainasteroid belt.Photometric observations at the Mark Evans Observatory during 2014 gave arotation period of 5.0689 ± 0.0001 hours. This value is in close agreement with previous studies.^[4] The spectrum shows it to be a stonyS(IV)-type asteroid.^[5]

^Noah Webster (1884)A Practical Dictionary of the English Language
^^a ^b"584 Semiramis (1906 SY)".JPL Small-Body Database.NASA/Jet Propulsion Laboratory. Archived fromthe original on 18 September 2020. Retrieved7 May 2016.
^^a ^bCarry, B. (December 2012), "Density of asteroids",Planetary and Space Science, vol. 73, pp. 98–118,arXiv:1203.4336,Bibcode:2012P&SS...73...98C,doi:10.1016/j.pss.2012.03.009. See Table 1.
^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
^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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583 Klotilde 584 Semiramis 585 Bilkis

Designation Groups List Moon Meanings of names
Asteroid	Active Aten asteroid Asteroid belt Family Jupiter trojan Near-Earth Spectral types
Distant minor planet	Centaur Neptune trojan Damocloid Trans-Neptunian object Detached Kuiper belt Oort cloud Scattered disc

Other

Authority control databases	JPL SBDB MPC

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