Blackburnian Warbler

by | Feb 22, 2018 | Warblers

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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.

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. ^ 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.
  2. ^ a b "2004 TG10". Minor Planet Center. Retrieved 29 July 2017.
  3. ^ 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.
  4. ^ 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.
  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.

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