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]

678 Fredegundis
Discovery
Discovered byW. Lorenz
Discovery siteHeidelberg
Discovery date22 January 1909
Designations
(678) Fredegundis
1909 FS
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc103.26 yr (37,715 d)
Aphelion3.1352 AU (469.02 Gm)
Perihelion2.0122 AU (301.02 Gm)
2.5737 AU (385.02 Gm)
Eccentricity0.21817
4.13 yr (1,508.1 d)
73.755°
0° 14m 19.356s / day
Inclination6.0824°
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

    1. "678 Fredegundis (1909 FS)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
    2. Schmadel, Lutz (2003), Dictionary of minor planet names, vol. 1, Springer, p. 66, ISBN 9783540002383.
    3. 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.


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