(196256) 2003 EH1
Near-Earth asteroid
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(196256) 2003 EH1 is an asteroid, classified as a near-Earth object of the Amor group. It was discovered on 6 March 2003, by astronomers of the LONEOS program at Anderson Mesa Station near Flagstaff, Arizona, in the United States.[2][4] Peter Jenniskens (2003–2004) proposed that it is the parent body of the Quadrantid meteor shower.[5][6] 2003 EH1 is likely an extinct comet and may even be related to the comet C/1490 Y1. 2003 EH1 came to perihelion on 12 March 2014.[1]
Discoverydate6 March 2003
(196256) 2003 EH1
| Discovery[1][2] | |
|---|---|
| Discovered by | LONEOS |
| Discovery date | 6 March 2003 |
| Designations | |
| (196256) 2003 EH1 | |
| NEO · Amor[1] extinct comet | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 4035 days (11.05 yr) |
| Aphelion | 5.055446 AU (756.2840 Gm) (Q) |
| Perihelion | 1.190060 AU (178.0304 Gm) (q) |
| 3.12275 AU (467.157 Gm) (a) | |
| Eccentricity | 0.618907 (e) |
| 5.52 yr (2015.6 d) | |
| 119.8736° (M) | |
| 0° 10m 42.984s / day (n) | |
| Inclination | 70.865968° (i) |
| 282.972499° (Ω) | |
| 171.3709° (ω) | |
| Earth MOID | 0.21143 AU (31.629 Gm) |
| Jupiter MOID | 0.231939 AU (34.6976 Gm) |
| TJupiter | 2.065 |
| Physical characteristics | |
| Dimensions | 2.6–4.0 km (1.6–2.5 mi) |
| 12.650±0.033 h[3] | |
| 0.04–0.09 (assumed) | |
| 16.2[1] | |