2004 TG10, is an eccentric asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group. First observed by the Spacewatch survey on 8 October 2004,[2] it may be a fragment of Comet Encke and is the source of the Northern Taurids meteor shower seen annually in November[3][5] and the June Beta Taurids.[6] The asteroid may be larger than one kilometer in diameter.
| Discovery[1][2] | |
|---|---|
| Discovered by | Spacewatch |
| Discovery site | Kitt Peak Obs. |
| Discovery date | 8 October 2004 (discovery: first observed only) |
| Designations | |
| 2004 TG10 | |
| NEO · Apollo · PHA[1] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 10.16 yr (3,712 days) |
| Aphelion | 4.1597 AU |
| Perihelion | 0.3086 AU |
| 2.2341 AU | |
| Eccentricity | 0.8619 |
| 3.34 yr (1,220 days) | |
| 278.07° | |
| 0° 17m 42.36s / day | |
| Inclination | 4.1802° |
| 205.10° | |
| 317.37° | |
| Earth MOID | 0.0225 AU · 8.8 LD |
| Jupiter MOID | 0.8877 AU |
| Physical characteristics | |
| Dimensions | 0.35–0.78 km[3] 1.316±0.605 km[4] |
| 0.018±0.037[4] | |
| 19.4[1][3] | |
Orbit
edit2004 TG10 orbits the Sun at a distance of 0.3–4.2 AU once every 3 years and 4 months (1,220 days). Its orbit has an eccentricity of 0.86 and an inclination of 4° with respect to the ecliptic.[1]
It has a Earth minimum orbital intersection distance of 0.0225 AU (3,370,000 km), which corresponds to 8.8 lunar distances.[1]
Physical characteristics
editAccording to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 1.316 kilometers in diameter and its surface has an exceptionally low albedo of 0.018,[4] while Porubcan estimates a diameter of 350 to 780 meters, based on an albedo of 0.25 to 0.05, which typically covers most S-type and C-type asteroids.[3]
| AU | 2004 TG10 | Encke[7] |
|---|---|---|
| Semi-major axis | 2.24 | 2.21 |
| Perihelion | 0.313 | 0.338 |
| Aphelion | 4.17 | 4.09 |
| Eccentricity | 0.859 | 0.847 |
| Longitude of perihelion | 162.455° | 161.113° |
References
edit- ^ a b c d e f "JPL Small-Body Database Browser: (2004 TG10)" (2014-12-04 last obs.). Jet Propulsion Laboratory. Retrieved 29 July 2017.
- ^ a b "2004 TG10". Minor Planet Center. Retrieved 29 July 2017.
- ^ a b c d Porubčan, V.; Kornoš, L.; Williams, I. P. (June 2006). "The Taurid complex meteor showers and asteroids". Contributions of the Astronomical Observatory Skalnaté Pleso. 36: 103–117. arXiv:0905.1639. Bibcode:2006CoSka..36..103P. Retrieved 29 July 2017.
- ^ a b c Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 29 July 2017.
- ^ Beth Dalbey (24 October 2017). "Taurids Meteor Shower Fireballs: Peak Dates, What To Expect". Retrieved 11 November 2017.
- ^ Meteor showers and their parent comets pg 470 by Peter Jenniskens
- ^ "JPL Small-Body Database Browser: 2P/Encke" (last observation: 2008-09-30). Retrieved 19 May 2009.
External links
edit- 2004 TG10 at NeoDyS-2, Near Earth Objects—Dynamic Site
- 2004 TG10 at ESA–space situational awareness
- 2004 TG10 at the JPL Small-Body Database
