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† |
12.650±0.033 h [3] | |
16.2 [1] | |
(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. [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]
†Assuming an albedo between 0.04 (typical of extinct comet nuclei) and 0.09.