Astronomy:62 Erato
.png) Lightcurve-based 3D-model of Erato | |
| Discovery | |
|---|---|
| Discovered by | Oskar Lesser Wilhelm Julius Foerster |
| Discovery date | 14 September 1860 |
| Designations | |
| (62) Erato | |
| Pronunciation | /ˈɛrətoʊ/[2] |
| Named after | Ἐρατώ Eratō |
| Minor planet category | main-belt · (middle) Themis [1] |
| Adjectives | Eratoian /ɛrəˈtoʊ.iən/ |
| Orbital characteristics | |
| Epoch 31 December 2006 (JD 2454100.5) | |
| |{{{apsis}}}|helion}} | 3.679 astronomical unit|AU (550.4 Gm) |
| |{{{apsis}}}|helion}} | 2.566 astronomical unit|AU (383.9 Gm) |
| 3.122 astronomical unit|AU (467.0 Gm) | |
| Eccentricity | 0.178 |
| Orbital period | 2,015.178 d (5.52 yr) |
| Mean anomaly | 161.828° |
| Inclination | 2.223° |
| Longitude of ascending node | 125.738° |
| 273.285° | |
| Physical characteristics | |
| Mean diameter | 95.4 km |
| Mass | ~6.27×1017 kg (calculated) |
| Mean density | 1.38 g/cm3 (assumed)[3] |
| Rotation period | 5.675±0.001 h[4] or 9.2213±0.0007 h[5] |
| Geometric albedo | 0.061[6] |
| Ch (SMASSII) BU (Tholen) | |
| Absolute magnitude (H) | 8.76 |
Erato /ˈɛrətoʊ/ (minor planet designation: 62 Erato) is a carbonaceous Themistian asteroid from the outer region of the asteroid belt, approximately 95 kilometers (59 miles) in diameter. Photometric measurements during 2004–2005 showed a rotation period of 9.2213±0.0007 h with an amplitude of 0.116±0.005 in magnitude.[5] It is orbiting the Sun with a period of 5.52 yr, a semimajor axis of 3.122 astronomical unit|AU, and eccentricity of 0.178. The orbital plane is inclined by an angle of 2.22° to the plane of the ecliptic.
Erato is the first asteroid to have been credited with co-discoverers, Oskar Lesser and Wilhelm Forster, who discovered it on 14 September 1860, from the Berlin Observatory. It was their first and only asteroid discovery. The name was chosen by Johann Franz Encke, director of the observatory, and refers to Erato, the Muse of lyric poetry in Greek mythology.[7] It has also been classified as an Eoan asteroid.[4]
References
- ↑ "Asteroid 62 Erato". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=62+Erato.
- ↑ Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ https://ui.adsabs.harvard.edu/abs/2002Icar..158...98K
- ↑ 4.0 4.1 Alvarez-Candal, Alvaro et al. (December 2004), "Rotational lightcurves of asteroids belonging to families", Icarus 172 (2): 388–401, doi:10.1016/j.icarus.2004.06.008, Bibcode: 2004Icar..172..388A.
- ↑ 5.0 5.1 Gonçalves, Rui M. D.; Behrend, Raoul (March 2006), "Lightcurve of 62 Erato", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 33 (1): 7, Bibcode: 2006MPBu...33....7G.
- ↑ "Asteroid Data Sets". http://www.psi.edu/pds/resource/albedo.html.
- ↑ Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names. Springer Science & Business Media. p. 21. ISBN 978-3-540-00238-3. https://books.google.com/books?id=KWrB1jPCa8AC&pg=PA21.
External links
- 62 Erato at AstDyS-2, Asteroids—Dynamic Site
- 62 Erato at the JPL Small-Body Database
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