501 Urhixidur

Urhixidur (minor planet designation: 501 Urhixidur) is a relatively large (ranked 372nd by IRAS) main belt asteroid. It was discovered on 18 January 1903, by astronomer Max Wolf (1863–1932), at the Heidelberg Observatory in southwest Germany. Like 500 Selinur and 502 Sigune, it is named after a character in Friedrich Theodor Vischer's then-bestseller satirical novel Auch Einer.[2]

501 Urhixidur
Discovery
Discovered byMax Wolf
Discovery siteHeidelberg Observatory
Discovery date18 January 1903
Designations
(501) Urhixidur
1903 LB; 1943 FC;
1949 FW; 1951 RB2;
1951 SE; 1955 FB
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc113.22 yr (41352 d)
Aphelion3.6114 AU (540.26 Gm)
Perihelion2.7270 AU (407.95 Gm)
3.1692 AU (474.11 Gm)
Eccentricity0.13953
5.64 yr (2060.7 d)
201.00°
0° 10m 28.92s / day
Inclination20.854°
357.30°
355.03°
Physical characteristics
Dimensions77.44±2.3 km
Mass4.9×1017 kg
Mean density
2.0 g/cm³
13.1743 h (0.54893 d)
0.0812±0.005
12.6–15.9
9.3

    Its rotational period was reported as 15 hours in 1992, but corrected to 13.174 hours in 2013.[3]

    References
    1. "501 Urhixidur". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 501. Retrieved 9 May 2016.
    2. Schmadel, Lutz D. (2013). Dictionary of Minor Planet Names. Springer Science & Business Media. p. 84. ISBN 978-3-662-02804-9.
    3. Hills, Kevin. "Asteroid Lightcurve Analysis at Riverland Dingo Observatory (RDO): 501 Urhixidur, 1897 Hind, 1928 Summa, 6261 Chione, and (68216) 2001 CV 26". The Minor Planet Bulletin. 40 (1): 12–13. Bibcode:2013MPBu...40...12H. ISSN 1052-8091.

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