801 Helwerthia

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801 Helwerthia
Discovery
Discovered by Max Wolf
Discovery site Heidelberg
Discovery date 20 March 1915
Designations
1915 WQ; A924 OD;
1925 RG; 1970 GS1
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 101.08 yr (36918 d)
Aphelion 2.8087 AU (420.18 Gm)
Perihelion 2.4007 AU (359.14 Gm)
2.6047 AU (389.66 Gm)
Eccentricity 0.078337
4.20 yr (1535.4 d)
47.6362°
0° 14m 4.056s / day
Inclination 14.130°
185.973°
335.076°
Earth MOID 1.41172 AU (211.190 Gm)
Jupiter MOID 2.17333 AU (325.126 Gm)
Jupiter Tisserand parameter 3.366
Physical characteristics
Mean radius
16.615±1.25 km
23.93 h (0.997 d)
0.0384±0.007
11.55

801 Helwerthia is a C-type asteroid orbiting in the Main belt near the Eunomia family. However, it is not a family member but an un-related interloper in the region because its composition is inconsistent with membership. Its diameter is about 33 km, its albedo around 0.038.[2]

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