2004 TG10

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.

2004 TG₁₀

Discovery[1][2]
Discovered by	Spacewatch
Discovery site	Kitt Peak Obs.
Discovery date	8 October 2004 (discovery: first observed only)
Designations
MPC designation	2004 TG10
Minor planet category	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
Semi-major axis	2.2341 AU
Eccentricity	0.8619
Orbital period (sidereal)	3.34 yr (1,220 days)
Mean anomaly	278.07°
Mean motion	0° 17m 42.36s / day
Inclination	4.1802°
Longitude of ascending node	205.10°
Argument of perihelion	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]
Geometric albedo	0.018±0.037[4]
Absolute magnitude (H)	19.4[1][3]

Orbit

2004 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

According 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]

TG10 compared to Comet Encke

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

1. "JPL Small-Body Database Browser: (2004 TG10)" (2014-12-04 last obs.). Jet Propulsion Laboratory. Retrieved 29 July 2017.
2. "2004 TG10". Minor Planet Center. Retrieved 29 July 2017.
3. 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.
4. 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.
5. Beth Dalbey (24 October 2017). "Taurids Meteor Shower Fireballs: Peak Dates, What To Expect". Retrieved 11 November 2017.
6. Meteor showers and their parent comets pg 470 by Peter Jenniskens
7. "JPL Small-Body Database Browser: 2P/Encke" (last observation: 2008-09-30). Retrieved 19 May 2009.

External links

• 2004 TG10 at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
• 2004 TG10 at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical properties · Summary
• 2004 TG10 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters