18 Melpomene
Discovery | |
---|---|
Discovered bi | John Russell Hind |
Discovery date | June 24, 1852 |
Designations | |
Pronunciation | /mɛlˈpɒmᵻniː/ mel-POM-i-nee |
Named after | Melpomenē |
Minor planet category | Main belt |
Orbital chairactereestics[1] | |
Epoch October 22, 2004 (JD 2453300.5) | |
Aphelion | 418.414 Gm (2.797 AU) |
Perihelion | 268.472 Gm (1.795 AU) |
343.443 Gm (2.296 AU) | |
Eccentricity | 0.218 |
Orbital period | 1270.552 d (3.48 a) |
Average orbital speed | 19.42 km/s |
Mean anomaly | 205.245° |
Inclination | 10.126° |
Longitude o ascendin node | 150.547° |
Argument o perihelion | 227.975° |
Pheesical chairacteristics | |
Dimensions | 170 x 155 x 129 km[2] (150×125 km)[3] (150×170 km)[4] 140.6 ± 2.8 km (IRAS)[1] |
Mass | 3.0×1018 kg[2] |
Mean density | 1.69±0.66 g/cm3[2] |
Surface gravity | ~0.0393 m/s2 |
Escape velocity | ~0.0743 km/s |
0.482 21 d (11.57 h)[1][5] | |
Albedo | 0.223 (geometric) [1][6] |
Temperatur | ~177 K |
Spectral teep | S[1] |
Apparent magnitude | 7.5[7] tae 12.0 |
6.51[1] | |
Angular diameter | 0.23" tae 0.059" |
18 Melpomene is a lairge, bricht main-belt asteroid that wis discovered bi J. R. Hind on Juin 24, 1852,[8] an named efter Melpomenē, the Muse o tragedy in Greek meethology.
References
- ↑ a b c d e f Yeomans, Donald K., "18 Melpomene", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 7 Apryle 2013.
- ↑ a b c Jim Baer (2008). "Recent Asteroid Mass Determinations". Personal Website. Archived frae the original on 21 October 2013. Retrieved 27 November 2008.
- ↑ Storrs, Alex; Weiss; Zellner; Burlsen; et al. (1999). "Imaging Observations of Asteroids with Hubble Space Telescope" (PDF). Icarus. 137 (2): 260–268. Bibcode:1999Icar..137..260S. doi:10.1006/icar.1999.6047. Archived (PDF) frae the original on 30 October 2008. Retrieved 3 November 2008. Unknown parameter
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ignored (help) - ↑ Storrs, Alex; Dunne; Conan; Mugnier; et al. (2005). "A closer look at main belt asteroids 1: WF/PC images" (PDF). Icarus. 173 (2): 409–416. Bibcode:2005Icar..173..409S. doi:10.1016/j.icarus.2004.08.007. Archived frae the original (PDF) on 10 Mairch 2012. Retrieved 26 November 2008.
- ↑ "Lightcurves and Map Data on Numbered Asteroids N° 1 TO 52225". AstroSurf. Archived frae the original on 27 November 2005. Retrieved 3 November 2008.Archived 2005-11-27 at the Wayback Machine
- ↑ "Asteroid Data Archive". Planetary Science Institute. Archived frae the original on 23 Juin 2006. Retrieved 3 November 2008.
- ↑ Menzel, Donald H.; Pasachoff, Jay M. (1983). A Field Guide to the Stars and Planets (2nd ed.). Boston, MA: Houghton Mifflin. p. 391. ISBN 0-395-34835-8.
- ↑ "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 Apryle 2013.