Astronomy:678 Fredegundis
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Short description: Asteroid orbiting the Sun
| 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) |
| |{{{apsis}}}|helion}} | 3.1352 astronomical unit|AU (469.02 Gm) |
| |{{{apsis}}}|helion}} | 2.0122 AU (301.02 Gm) |
| 2.5737 AU (385.02 Gm) | |
| Eccentricity | 0.21817 |
| Orbital period | 4.13 yr (1,508.1 d) |
| Mean anomaly | 73.755° |
| Mean motion | 0° 14m 19.356s / day |
| Inclination | 6.0824° |
| Longitude of ascending node | 281.416° |
| 120.267° | |
| Physical characteristics | |
| Mean radius | 20.90±1 km |
| Rotation period | 11.61624 h (0.484010 d) |
| Geometric albedo | 0.2494±0.026 |
| Absolute magnitude (H) | 9.02 |
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 astronomical unit|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]
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
- ↑ 1.0 1.1 "678 Fredegundis (1909 FS)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=678.
- ↑ Schmadel, Lutz (2003), Dictionary of minor planet names, 1, Springer, p. 66, ISBN 9783540002383, https://books.google.com/books?id=VoJ5nUyIzCsC&pg=PA66.
- ↑ 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, doi:10.1051/0004-6361/201935246, A42, Bibcode: 2019A&A...626A..42L.
External links
- Lightcurve plot of 678 Fredegundis, Palmer Divide Observatory, B. D. Warner (2008)
- Asteroid Lightcurve Database (LCDB), query form (info )
- 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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