Astronomy:109 Felicitas
_Felicitas.png) 3D convex shape model of 109 Felicitas | |
| Discovery | |
|---|---|
| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | 9 October 1869 |
| Designations | |
| (109) Felicitas | |
| Pronunciation | /fɪˈlɪsɪtæs/[1] |
| Named after | Felicitas |
| A869 TA; 1911 HA | |
| Minor planet category | Main belt |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 146.39 yr (53470 d) |
| |{{{apsis}}}|helion}} | 3.4971 astronomical unit|AU (523.16 Gm) |
| |{{{apsis}}}|helion}} | 1.89658 AU (283.724 Gm) |
| 2.6968 AU (403.44 Gm) | |
| Eccentricity | 0.29674 |
| Orbital period | 4.43 yr (1617.6 d) |
| Average Orbital speed | 17.73 km/s |
| Mean anomaly | 30.6904° |
| Mean motion | 0° 13m 21.18s / day |
| Inclination | 7.8813° |
| Longitude of ascending node | 3.1617° |
| 56.392° | |
| Earth MOID | 0.920053 AU (137.6380 Gm) |
| Jupiter MOID | 1.95452 AU (292.392 Gm) |
| TJupiter | 3.291 |
| Physical characteristics | |
| Dimensions | 89.44±2.5 km[2] 88.971 km[3] |
| Mass | 7.5×1017 kg |
Equatorial surface gravity | 0.0250 m/s2 |
Equatorial escape velocity | 0.0473 km/s |
| Rotation period | 13.191 h (0.5496 d)[2][4] |
| Geometric albedo | 0.0699±0.004[2] 0.07 ± 0.02[3] |
| Physics | ~170 K |
| GC (Tholen)[3] | |
| Absolute magnitude (H) | 8.75,[2] 8.759[3] |
Felicitas (minor planet designation: 109 Felicitas) is a dark and fairly large main-belt asteroid. It was discovered by German-American astronomer C. H. F. Peters on October 9, 1869, and named after Felicitas, the Roman goddess of success.[5] The only observed stellar occultation by Felicitas is one from Japan (March 29, 2003).[6]
This body is orbiting the Sun with a period of 4.43 years and an eccentricity (ovalness) of 0.3. Its orbital plane is inclined by 7.9° from the plane of the ecliptic. 109 Felicitas is classified as a carbonaceous GC-type asteroid. It is spinning with a rotation period of 13.2 hours. During 2002, 109 Felicitas was observed by radar from the Arecibo Observatory. The return signal matched an effective diameter of 89 ± 9 km. This is consistent with the asteroid dimensions computed through other means.[4]
References
- ↑ Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ 2.0 2.1 2.2 2.3 2.4 Yeomans, Donald K., "109 Felicitas", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=109, retrieved 12 May 2016.
- ↑ 3.0 3.1 3.2 3.3 Pravec, P. et al. (May 2012), "Absolute Magnitudes of Asteroids and a Revision of Asteroid Albedo Estimates from WISE Thermal Observations", Asteroids, Comets, Meteors 2012, Proceedings of the conference held May 16–20, 2012 in Niigata, Japan 1667 (1667): pp. 6089, Bibcode: 2012LPICo1667.6089P.
- ↑ 4.0 4.1 Magri, Christopher et al. (January 2007), "A radar survey of main-belt asteroids: Arecibo observations of 55 objects during 1999–2003", Icarus 186 (1): 126–151, doi:10.1016/j.icarus.2006.08.018, Bibcode: 2007Icar..186..126M
- ↑ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names (6th ed.), Springer, p. 23, ISBN 978-3642297182.
- ↑ Observed minor planet occultation events, version of 2005 July 26
External links
- 109 Felicitas at AstDyS-2, Asteroids—Dynamic Site
- 109 Felicitas at the JPL Small-Body Database
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