1995 Hajek

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1995 Hajek
Discovery [1][2]
Discovered by L. Kohoutek
Discovery site Bergedorf Obs.
Discovery date 26 October 1971
Designations
MPC designation 1995 Hajek
Named after
Tadeáš Hájek
(astronomer)[3]
1971 UP1 · 1941 EA
main-belt · (inner)[4]
Orbital characteristics[1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc 74.67 yr (27,275 days)
Aphelion 2.6659 AU
Perihelion 2.3924 AU
2.5292 AU
Eccentricity 0.0540
4.02 yr (1,469 days)
170.20°
Inclination 10.822°
47.238°
134.52°
Physical characteristics
Dimensions 15.29±1.04 km[5]
12.683±0.288 km[6]
14.45±2.58 km[7]
6.50 km (calculated)[4]
10±4 km (magnitude)[8]
10 h[9]
0.063±0.010[5]
0.0833±0.0249[6]
0.040±0.025[7]
0.20 (assumed)[4]
X[4][10]
13.3[1]
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1995 Hajek, provisional designation 1971 UP1, is a metallic asteroid from the inner regions of the asteroid belt. It was discovered by Czech astronomer Luboš Kohoutek at the Bergedorf Observatory in Hamburg, Germany, on 26 October 1971.[2]

The asteroid orbits the Sun at a distance of 2.4–2.7 AU once every 4.02 years (1,469 days). Its orbit shows an eccentricity of 0.05 and is tilted by 11 degrees to the plane of the ecliptic. It has a provisional rotation period of 10 hours[9] and measurements of its spectral properties identified it as a metallic X-type asteroid.[4][10]

Observations by the Akari and WISE satellites, as well as calculations by the Collaborative Asteroid Lightcurve Link (CALL), rendered a divergent estimated of the body's diameter in a large range of 6.5 to 15.3 kilometers. Likewise, the body's albedo also varies between 0.04 and 0.08 for the satellite-based observations, while CALL assumes an albedo of 0.20.[4] These contrasting albedo and diameter figures closely correspond to a generic magnitude-to-diameter conversion, where, for an absolute magnitude of 13.3, the body's diameter is in the range of about 6 to 14 kilometers, based on an albedo between 0.05 and 0.25.[8]

The minor planet is named after the Bohemian astronomer Tadeáš Hájek (1525–1600), better known by his Latinized name, Thaddaeus Hagecius. He was one of the founders of modern stellar and cometary astronomy, who studied the Great Comet of 1577 and the supernova SN 1572, also known as Tycho's Nova. The lunar crater Hagecius is also named in his honour.[3]

References

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External links


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