Astronomy:(196256) 2003 EH1
From HandWiki
| Discovery[1][2] | |
|---|---|
| Discovered by | LONEOS |
| Discovery date | 6 March 2003 |
| Designations | |
| (196256) 2003 EH1 | |
| Minor planet category | 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) |
| |{{{apsis}}}|helion}} | 5.055446 astronomical unit|AU (756.2840 Gm) (Q) |
| |{{{apsis}}}|helion}} | 1.190060 AU (178.0304 Gm) (q) |
| 3.12275 AU (467.157 Gm) (a) | |
| Eccentricity | 0.618907 (e) |
| Orbital period | 5.52 yr (2015.6 d) |
| Mean anomaly | 119.8736° (M) |
| Mean motion | 0° 10m 42.984s / day (n) |
| Inclination | 70.865968° (i) |
| Longitude of ascending node | 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† |
| Sidereal rotation period | 12.650±0.033 h[3] |
| Absolute magnitude (H) | 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] thumb|320px|left|The orbit of 2003 EH1
Notes
†Assuming an albedo between 0.04 (typical of extinct comet nuclei) and 0.09.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 196256 (2003 EH1)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2003EH1;cad=1. Retrieved 7 April 2016.
- ↑ 2.0 2.1 "IAUC 8252: 2003kw; 2003 EH_1, THE QUADRANTIDS". IAU Central Bureau for Astronomical Telegrams. 2003-12-08. http://www.cbat.eps.harvard.edu/iauc/08200/08252.html. Retrieved 2015-10-14.
- ↑ Kasuga, Toshihiro; Jewitt, David (2015). "Physical Observations of (196256) 2003 EH1, Presumed Parent of the Quadrantid Meteoroid Stream". The Astronomical Journal 150 (5): 152. doi:10.1088/0004-6256/150/5/152. Bibcode: 2015AJ....150..152K.
- ↑ Ball, Philip (2003). "Dead comet spawned New Year meteors". Nature News. doi:10.1038/news031229-5.
- ↑ "2003 EH1 Is the Quadrantid Shower Parent Comet". The Astronomical Journal 127 (5): 3018–3022. 2004. doi:10.1086/383213. Bibcode: 2004AJ....127.3018J.
- ↑ 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
- Quadrantid Parent Discovered (Leonid Daily News: 8 December 2003)
- (196256) 2003 EH1 at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- (196256) 2003 EH1 at ESA–space situational awareness
- (196256) 2003 EH1 at the JPL Small-Body Database
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