6144 Kondojiro (1994 EQ3) is an asteroid discovered on 14 March 1994 by Kin Endate and Kazuro Watanabe at the Kitami Observatory in eastern Hokkaidō, Japan. It is named after Jiro Kondo, a Japanese Egyptologist and professor of archaeology at Waseda University.

6144 Kondojiro
Discovery
Discovered byK. Endate, K. Watanabe
Discovery siteKitami
Discovery date14 March 1994
Designations
(6144) Kondojiro
Named after
Jiro Kondo
1994 EQ3, 1937 JF, 1937 JQ, 1984 FW1
Jupiter-crosser asteroid
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc22150 days (60.64 yr)
Aphelion6.47345 AU (968.414 Gm) (Q)
Perihelion3.03222 AU (453.614 Gm) (q)
4.75283 AU (711.013 Gm) (a)
Eccentricity0.36202 (e)
10.36 yr (3784.66 d)
34.71927° (M)
0° 5m 42.435s / day (n)
Inclination5.88716° (i)
117.14167° (Ω)
96.127254° (ω)
Earth MOID2.03358 AU (304.219 Gm)
Jupiter MOID0.204605 AU (30.6085 Gm)
TJupiter2.867
Physical characteristics
Dimensions32.9±5.1 km[2]
4.0±2 h[1][3]
0.044±0.009[2]
D[4]
11.6

Orbit and classification

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The orbit of 6144 Kondojiro compared to that of Jupiter and the inner planets

The orbit of 6144 Kondojiro is unusual for a number of reasons, including:

It is difficult to classify an object with such a peculiar orbit using a conventional definition. Despite this, the Minor Planet Center (MPC) lists it as a main-belt asteroid,[5] even though both the orbital and physical properties of 6144 Kondojiro suggest that it may be an extinct comet rather than a true asteroid.[4] The JPL Small-Body Database lists only 33 such objects that have an observation arc greater than 30 days.[6]

See also

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References

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  1. ^ a b "JPL Small-Body Database Browser: 6144 Kondojiro (1994 EQ3)". 14 August 2015. Retrieved 19 November 2015.
  2. ^ a b J. Licandro, 2015, "Size and albedo distributions of asteroids in cometary orbits using WISE data"
  3. ^ Behrend, Raoul. "Asteroids and comets rotation curves – (6144) Kondojiro". Geneva Observatory. Retrieved 6 January 2016.
  4. ^ a b M. Ishiguro, 2014, "Physical Properties of Asteroids in Comet-like Orbits in Infrared Asteroid Survey Catalogs"
  5. ^ "IAU Minor Planet Center - (6144) Kondojiro". Minor Planet Center. Retrieved 19 November 2015.
  6. ^ "JPL Small-Body Database Search Engine: orbital class (AST) and data-arc span > 30 (d)". Jet Propulsion Laboratory Solar System Dynamics. Retrieved 2 March 2018.
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