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 | |
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
edit- ^ a b "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
edit- 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