![]() 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 | |
(685) Hermia | |
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 ° | |
0° 17m 41.208s / day | |
Inclination | 3.6466° |
235.210° | |
80.876° | |
Physical characteristics | |
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 [3] belonging to the Flora family in the Main Belt. [2] Its diameter is about 11 km and it has an albedo of 0.281. [4]
![]() 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 | |
(685) Hermia | |
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 ° | |
0° 17m 41.208s / day | |
Inclination | 3.6466° |
235.210° | |
80.876° | |
Physical characteristics | |
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 [3] belonging to the Flora family in the Main Belt. [2] Its diameter is about 11 km and it has an albedo of 0.281. [4]