| Discovery [1] | |
|---|---|
| Discovered by | C. J. van Houten I. van Houten-G. T. Gehrels |
| Discovery site | Palomar Obs. |
| Discovery date | 19 September 1973 |
| Designations | |
| (4138) Kalchas | |
| Pronunciation | /ˈkælkəs/ |
Named after | Calchas [1] (Greek mythology) |
| 1973 SM · 1986 VU6 | |
| Jupiter trojan [1][2] Greek [3] · background [4] | |
| Adjectives | Kalchantian |
| Orbital characteristics [2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 61.48 yr (22,454 d) |
| Aphelion | 5.3874 AU |
| Perihelion | 4.9395 AU |
| 5.1634 AU | |
| Eccentricity | 0.0434 |
| 11.73 yr (4,286 d) | |
| 283.43° | |
| 0° 5m 2.4s / day | |
| Inclination | 2.0993° |
| 208.02° | |
| 164.17° | |
| Jupiter MOID | 0.019 AU |
| TJupiter | 2.9970 |
| Physical characteristics | |
| 46.46±0.67 km[5] 61.04±3.49 km[6] | |
| 29.2±0.1 h[7] | |
| 0.057±0.007[6] 0.082±0.006[5] | |
| C (assumed)[8] V–I = 0.810±0.038[8] | |
| 9.80[6] 10.0[5] 10.1[1][2][8] | |
4138 Kalchas /ˈkælkəs/ is a large Jupiter trojan from the Greek camp, approximately 53 kilometers (33 miles) in diameter. It was discovered on 19 September 1973, by Dutch astronomers Ingrid and Cornelis van Houten at Leiden, on photographic plates taken by Tom Gehrels at the Palomar Observatory in California.[1] The assumed C-type asteroid is the principal body of the proposed Kalchas family and has a rotation period of 29.2 hours.[8] It was named after the seer Calchas from Greek mythology.[1]
MPC-object was invoked but never defined (see the help page).jpldata was invoked but never defined (see the help page).MPC-Jupiter-Trojans was invoked but never defined (see the help page).AstDys-object was invoked but never defined (see the help page).Grav-2012 was invoked but never defined (see the help page).AKARI was invoked but never defined (see the help page).French-2012 was invoked but never defined (see the help page).lcdb was invoked but never defined (see the help page).