| Discovery [1] | |
|---|---|
| Discovered by | C. J. van Houten I. van Houten-G. T. Gehrels |
| Discovery site | Palomar Obs. |
| Discovery date | 30 September 1973 |
| Designations | |
| (4587) Rees | |
Named after | Martin Rees [1] (British cosmologist) |
| 3239 T-2 · 1990 HQ 6378 P-L | |
| Mars-crosser formerly Amor[a] | |
| Orbital characteristics [2] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 57.10 yr (20,855 d) |
| Aphelion | 4.0117 AU |
| Perihelion | 1.3057 AU |
| 2.6587 AU | |
| Eccentricity | 0.5089 |
| 4.34 yr (1,583 d) | |
| 232.48° | |
| 0° 13m 38.64s / day | |
| Inclination | 24.626° |
| 180.37° | |
| 83.989° | |
| Earth MOID | 0.5364 AU (209 LD) |
| TJupiter | 3.0760 |
| Physical characteristics | |
| 2.03 km (calculated)[3] | |
| 7.879±0.002 h[4][b] | |
| 0.20 (assumed)[3] | |
| S/Sr (assumed)[3][5] | |
| 15.3[1][2] 15.87[3] | |
4587 Rees, provisional designation 3239 T-2, is a Mars-crosser and former near-Earth object on an eccentric orbit from the asteroid belt, approximately 2 kilometers (1.2 miles) in diameter. It was discovered during the second Palomar–Leiden Trojan survey on 30 September 1973, by Dutch astronomer couple Ingrid and Cornelis van Houten at Leiden, and Tom Gehrels at the Palomar Observatory in California.[1] The assumed S-type asteroid has a rotation period of 7.9 hours and is likely elongated in shape.[3] It was named after British astrophysicist Martin Rees.[1]
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