(196256) 2003 EH1
| Discovery | |
|---|---|
| Discovered by | LONEOS |
| Discovery date | 6 March 2003 |
| Designations | |
| (196256) 2003 EH1 | |
| NEO · Amor extinct comet | |
| Orbital characteristics | |
| 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† |
| 12.650±0.033 h | |
| 16.2 | |
(196256) 2003 EH1 is an asteroid, classified as 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. Peter Jenniskens (2003–2004) proposed that it is the parent body of the Quadrantid meteor shower. 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.