6144 Kondojiro
| Discovery | |
|---|---|
| Discovered by | K. Endate, K. Watanabe |
| Discovery site | Kitami |
| Discovery date | March 14, 1994 |
| Designations | |
| MPC designation | 6144 |
Named after | Jiro Kondo |
| 1994 EQ3, 1937 JF, 1937 JQ, 1984 FW1 | |
| Jupiter-crosser asteroid | |
| Orbital characteristics[1] | |
|
Epoch JD 2457200.5 (27 June 2015) T_jup = 2.867 | |
| Uncertainty parameter 0 | |
| Observation arc | 60.64 yr (22,150 days) |
| Aphelion | 6.47103 AU (Q) |
| Perihelion | 3.03205 AU (q) |
| 4.75154 AU (a) | |
| Eccentricity | 0.36188 |
|
10.36 yr (3783.117 d) | |
| 15.71228° (M) | |
| Inclination | 5.88727° |
| 117.14106° | |
| 96.105915° | |
| Earth MOID | 2.03401 AU |
| Physical characteristics | |
| Dimensions | 32.9±5.1 km[2] |
| 4.0±2 h[1][3] | |
| 0.044±0.009[2] | |
| D[4] | |
| 11.6 | |
|
| |
6144 Kondojiro (1994 EQ3) is an asteroid discovered on March 14, 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.
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:
- An eccentricity greater than 0.3,
- A semi-major axis between that of an outer main-belt asteroid (3.2 AU < a < 4.6 AU) and a Jupiter trojan (4.6 AU < a < 5.5 AU),
- A relatively low inclination for a Jupiter-crossing minor planet, and
- A lack of proper orbital elements due to recurring perturbations by Jupiter.
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]
See also
References
- 1 2 "JPL Small-Body Database Browser: 6144 Kondojiro (1994 EQ3)". 2015-08-14. Retrieved 2015-11-19.
- 1 2 J. Licandro, 2015, "Size and albedo distributions of asteroids in cometary orbits using WISE data"
- ↑ Behrend, Raoul. "Asteroids and comets rotation curves – (6144) Kondojiro". Geneva Observatory. Retrieved January 2016.
- 1 2 M. Ishiguro, 2014, "Physical Properties of Asteroids in Comet-like Orbits in Infrared Asteroid Survey Catalogs"
- ↑ "IAU Minor Planet Center - (6144) Kondojiro". Minor Planet Center. Retrieved 2015-11-19.
External links
- Orbital simulation from JPL (Java) / Ephemeris
- 6144 Kondojiro at the JPL Small-Body Database
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