682 Hagar
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682 Hagar (prov. designation: A909 MA or 1909 HA) is an Eunomia asteroid from the central regions of the asteroid belt. It was discovered on 17 June 1909, by German astronomer August Kopff at the Heidelberg-Königstuhl State Observatory.[1] The presumed S-type asteroid has a short rotation period of 4.9 hours and measures approximately 19 kilometers (12 miles) in diameter. Possibly inspired by the asteroid's provisional designation "1909 HA", it was named for the biblical woman Hagar.[3]
Quick Facts Discovery, Discovered by ...
![]() Modelled shape of Hagar from its lightcurve | |
Discovery [1] | |
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Discovered by | A. Kopff |
Discovery site | Heidelberg Obs. |
Discovery date | 17 June 1909 |
Designations | |
(682) Hagar | |
Pronunciation | /ˈheɪɡɑːr/[2] |
Named after | Hagar (Biblical woman)[3] |
A909 MA · 1943 GK 1953 VU3 · 1975 VO5 1909 HA | |
main-belt [1][4] · (middle) Eunomia [5][6][7] | |
Orbital characteristics [4] | |
Epoch 31 May 2020 (JD 2459000.5) | |
Uncertainty parameter 0 | |
Observation arc | 110.96 yr (40,529 d) |
Aphelion | 3.1105 AU |
Perihelion | 2.1966 AU |
2.6536 AU | |
Eccentricity | 0.1722 |
4.32 yr (1,579 d) | |
225.55° | |
0° 13m 40.8s / day | |
Inclination | 11.507° |
190.78° | |
105.08° | |
Physical characteristics | |
19±4 km[8] | |
4.8503±0.0001 h[8][lower-alpha 1] | |
Pole ecliptic latitude | |
0.057 (assumed)[8] | |
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