Astronomy:584 Semiramis
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.png) 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 | |
| (584) Semiramis | |
| Pronunciation | /sɪˈmɪrəmɪs/[1] |
| Named after | Semiramis |
| 1906 SY | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 110.26 yr (40272 d) |
| |{{{apsis}}}|helion}} | 2.9282 astronomical unit|AU (438.05 Gm) |
| |{{{apsis}}}|helion}} | 1.8224 AU (272.63 Gm) |
| 2.3753 AU (355.34 Gm) | |
| Eccentricity | 0.23276 |
| Orbital period | 3.66 yr (1337.1 d) |
| Mean anomaly | 166.35° |
| Mean motion | 0° 16m 9.228s / day |
| Inclination | 10.718° |
| Longitude of ascending node | 282.159° |
| 85.121° | |
| Physical characteristics | |
| Mean radius | 27.005±0.7 km[2] 25.89 ± 1.075 km[3] |
| Mass | (8.23 ± 5.77) × 1017 kg[3] |
| Rotation period | 5.068 h (0.2112 d) |
| Geometric albedo | 0.1987±0.011 |
| Absolute magnitude (H) | 8.71 |
Semiramis (minor planet designation: 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.[4] The spectrum shows it to be a stony S(IV)-type asteroid.[5]
References
- ↑ Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ 2.0 2.1 "584 Semiramis (1906 SY)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=584;cad=1.
- ↑ 3.0 3.1 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. 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, doi:10.1086/426431, Bibcode: 2004ApJ...615L.161S
External links
- 584 Semiramis at AstDyS-2, Asteroids—Dynamic Site
- 584 Semiramis at the JPL Small-Body Database
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