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4000 Hipparchus information


4000 Hipparchus
Discovery [1]
Discovered byS. Ueda
H. Kaneda
Discovery siteKushiro Obs.
Discovery date4 January 1989
Designations
MPC designation
(4000) Hipparchus
Pronunciation/hɪˈpɑːrkəs/[2]
Named after
Hipparchus [3]
(ancient Greek astronomer)
Alternative designations
1989 AV · 1963 XA
1975 TW4 · 1977 FZ2
1978 NG8 · 1979 WU4
1984 YX5 · 1987 SD18
Minor planet category
main-belt [1][4] · (middle)
background [5] · Astraea [6]
Orbital characteristics [4]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 0
Observation arc63.50 yr (23,192 d)
Aphelion2.8835 AU
Perihelion2.2968 AU
Semi-major axis
2.5901 AU
Eccentricity0.1133
Orbital period (sidereal)
4.17 yr (1,523 d)
Mean anomaly
78.842°
Mean motion
0° 14m 11.04s / day
Inclination2.7163°
Longitude of ascending node
318.53°
Argument of perihelion
173.15°
Physical characteristics
Mean diameter
15.13±4.81 km[7]
17.485±0.032 km[8][9]
18.217±0.094 km[10]
18.87±0.59 km[11]
Synodic rotation period
3.418±0.001 h[12]
Geometric albedo
0.0388[10]
0.046[11]
0.05[7]
0.052[8][9]
Absolute magnitude (H)
12.60[8][10][11]
12.8[1][4][13]
13.01[7]

4000 Hipparchus /hɪˈpɑːrkəs/ is a dark background asteroid from the central regions of the asteroid belt, approximately 17 kilometers (11 miles) in diameter. It was discovered on 4 January 1989, by Japanese astronomers Seiji Ueda and Hiroshi Kaneda at the Kushiro Observatory on Hokkaido, Japan.[1] The likely carbonaceous asteroid has a short rotation period of 3.4 hours.[13] It was named for the ancient Greek astronomer Hipparchus.[3]

  1. ^ a b c d Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  2. ^ Noah Webster (1884) A Practical Dictionary of the English Language
  3. ^ a b Cite error: The named reference springer was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference jpldata was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Ferret was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference AstDys-object was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Nugent-2016 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Mainzer-2016 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Masiero-2014 was invoked but never defined (see the help page).
  10. ^ a b c Cite error: The named reference WISE was invoked but never defined (see the help page).
  11. ^ a b c Cite error: The named reference AKARI was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Odden-2014 was invoked but never defined (see the help page).
  13. ^ a b Cite error: The named reference lcdb was invoked but never defined (see the help page).

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