9708 Gouka
| Discovery[1] | |
|---|---|
| Discovered by | C. J. van Houten, I. van Houten-Groeneveld, and T. Gehrels |
| Discovery site | Palomar Observatory |
| Discovery date | 16 October 1977 |
| Designations | |
| MPC designation | 9708 Gouka |
| MPO 309227, 1990 VF11, 1990 WX8, 1996 JH15, 4140 T-3, T/4140 T-3 | |
Main belt  | |
| Orbital characteristics[2] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc |
13491[1] d 36.94 yr |
| Aphelion | 3.05226757 AU (456.612729 Gm) |
| Perihelion | 2.1579877 AU (322.83036 Gm) |
| 2.60512761 AU (389.721543 Gm) | |
| Eccentricity | 0.17163841 |
| 4.20 yr (1535.8 d) | |
Average orbital speed | 18.3144586 km/s |
| 278.37739° | |
| 0° 14m 3.846s / day | |
| Inclination | 5.8900817° |
| 116.04818° | |
| 36.344393° | |
| Earth MOID | 1.17233 AU (175.378 Gm) |
| Jupiter MOID | 1.96006 AU (293.221 Gm) |
| Jupiter Tisserand parameter | 3.384 |
| Physical characteristics | |
| Dimensions | 3–7 km[3] |
| 14.6[2] | |
|
| |
9708 Gouka (also known as 4140 T-3, 1990 VF11, 1990 WX8, and 1996 JH15) is a main belt asteroid.
Discovery and naming
This asteroid was originally discovered in observations made on October 16, 1977 by Cornelis Johannes van Houten and Ingrid van Houten-Groeneveld on photographic plates taken by Tom Gehrels with the Samuel Oschin telescope at the Palomar Observatory.[1][2] At that time, the asteroid was given the provisional designation "4140 T-3". The asteroid was renamed Gouka after Adriaan Jacobus Gouka (1879-1963), Dutch co-founder in 1901 of the NVWS, the Dutch Astronomical and Meteorological Society. The name was suggested by H. van Woerden. The asteroid was also observed in 1996 and twice in 1990, resulting in multiple designations before it was determined that these observations were of the same object.
Orbit
This asteroid has a well-established orbit calculated from almost 37 years of observations. Based on the Earth MOID, the closest that this asteroid can possibly come to Earth is over 1 AU, the distance from the Earth to the Sun. The Jupiter Tisserand invariant, used to distinguish different kinds of orbits, is 3.384.[2]
References
- 1 2 3 "(9708) Gouka = 1990 VF11 = 1990 WX8 = 1996 JH15 = 4140 T-3 = T/4140 T-3". Minor Planet Center. 18 Sep 2014.
- 1 2 3 4 "JPL Small-Body Database Browser: 9708 Gouka (4140 T-3)" (last observation: 2014-09-18; arc: 36.94 yr). Jet Propulsion Laboratory. Retrieved 13 April 2016.
- ↑ "ABSOLUTE MAGNITUDE (H)". NASA.
