685 Hermia

685 Hermia

A three-dimensional model of 685 Hermia based on its light curve.
Discovery
Discovered by W. Lorenz
Discovery site Heidelberg Obs.
Discovery date 12 August 1909
Designations
1909 HE
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 89.52 yr (32696 d)
Aphelion 2.6752 AU (400.20 Gm)
Perihelion 1.7969 AU (268.81 Gm)
2.2360 AU (334.50 Gm)
Eccentricity 0.19640
3.34 yr (1221.3 d)
4.11590°
 17m 41.208s / day
Inclination 3.6466°
235.210°
80.876°
Earth MOID 0.787259 AU (117.7723 Gm)
Jupiter MOID 2.60969 AU (390.404 Gm)
Jupiter Tisserand parameter 3.610
Physical characteristics
Mean radius
5.475±0.45 km
50.40 ± 0.05 h (2.1000 ± 0.0021 d)[2]
0.2807±0.050
12.0

    685 Hermia is an S-type asteroid belonging to the Flora family in the Main Belt.[2] Its diameter is about 11 km and it has an albedo of 0.281 .

    References

    1. "685 Hermia (1909 HE)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
    2. 1 2 Kryszczynska, A.; et al. (October 2012). "Do Slivan states exist in the Flora family?. I. Photometric survey of the Flora region". Astronomy & Astrophysics. 546: 51. Bibcode:2012A&A...546A..72K. doi:10.1051/0004-6361/201219199. A72.

    External links


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