(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]
| 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] | |
Notes
edit†Assuming an albedo between 0.04 (typical of extinct comet nuclei) and 0.09.
References
edit- ^ a b c d e "JPL Small-Body Database Browser: 196256 (2003 EH1)" (2014-03-23 last obs and observation arc=11.05 years). Jet Propulsion Laboratory. Retrieved 7 April 2016.
- ^ a b "IAUC 8252: 2003kw; 2003 EH_1, THE QUADRANTIDS". IAU Central Bureau for Astronomical Telegrams. 8 December 2003. Retrieved 14 October 2015.
- ^ Kasuga, Toshihiro; Jewitt, David (2015). "Physical Observations of (196256) 2003 EH1, Presumed Parent of the Quadrantid Meteoroid Stream". The Astronomical Journal. 150 (5). 152. arXiv:1509.03361. Bibcode:2015AJ....150..152K. doi:10.1088/0004-6256/150/5/152. S2CID 50649.
- ^ Ball, Philip (2003). "Dead comet spawned New Year meteors". Nature News. doi:10.1038/news031229-5.
- ^ Jenniskens, Peter (2004). "2003 EH1 Is the Quadrantid Shower Parent Comet". The Astronomical Journal. 127 (5): 3018–3022. Bibcode:2004AJ....127.3018J. doi:10.1086/383213.
- ^ Porubčan, V.; Kornoš, L. (2005). "The Quadrantid meteor stream and 2003 EH1". Contributions of the Astronomical Observatory Skalnaté Pleso. 35 (1): 5–16. Bibcode:2005CoSka..35....5P.
External links
edit- Quadrantid Parent Discovered (Leonid Daily News: 8 December 2003)
- (196256) 2003 EH1 at NeoDyS-2, Near Earth Objects—Dynamic Site
- (196256) 2003 EH1 at ESA–space situational awareness
- (196256) 2003 EH1 at the JPL Small-Body Database