678 Fredegundis
678 Fredegundis is a minor planet orbiting the Sun. It was discovered 22 January 1909 from Heidelberg by German astronomer K. Wilhelm Lorenz, and was named after the French opera Frédégonde.[2] This object is orbiting at a distance of 2.57 AU with a period of 4.13 years and an eccentricity (ovalness) of 0.22. The orbital plane is inclined at an angle of 6.1° to the plane of the ecliptic[1]
| Discovery | |
|---|---|
| Discovered by | W. Lorenz |
| Discovery site | Heidelberg |
| Discovery date | 22 January 1909 |
| Designations | |
| (678) Fredegundis | |
| 1909 FS | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 103.26 yr (37,715 d) |
| Aphelion | 3.1352 AU (469.02 Gm) |
| Perihelion | 2.0122 AU (301.02 Gm) |
| 2.5737 AU (385.02 Gm) | |
| Eccentricity | 0.21817 |
| 4.13 yr (1,508.1 d) | |
| 73.755° | |
| 0° 14m 19.356s / day | |
| Inclination | 6.0824° |
| 281.416° | |
| 120.267° | |
| Physical characteristics | |
Mean radius | 20.90±1 km |
| 11.61624 h (0.484010 d) | |
| 0.2494±0.026 | |
| 9.02 | |
This appears to be an M-type asteroid in the Tholen classification and X-type in the Bus and Binzel system. It spans a girth of approximately 42 km and is spinning with a rotation period of 11.6201 hours. Radar observations suggest a bifurcated structure consistent with a contact binary.[3]
References
- "678 Fredegundis (1909 FS)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
- Schmadel, Lutz (2003), Dictionary of minor planet names, vol. 1, Springer, p. 66, ISBN 9783540002383.
- López-Sisterna, C.; et al. (June 2019), "Polarimetric survey of main-belt asteroids. VII. New results for 82 main-belt objects", Astronomy & Astrophysics, 626: 5, Bibcode:2019A&A...626A..42L, doi:10.1051/0004-6361/201935246, A42.
External links
- Lightcurve plot of 678 Fredegundis, Palmer Divide Observatory, B. D. Warner (2008)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 678 Fredegundis at AstDyS-2, Asteroids—Dynamic Site
- 678 Fredegundis at the JPL Small-Body Database
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