astro.wikisort.org - Asteroid

(179806) 2002 TD₆₆ (also written 2002 TD66) is a sub-kilometer asteroid, classified as near-Earth object of the Apollo group. It was discovered on 5 October 2002, by the LINEAR project at Lincoln Laboratory's ETS in Socorro, New Mexico.[1] It was announced on 7 October 2002 and appeared later that day on the JPL current risk page.

(179806) 2002 TD₆₆

Discovery
Discovered by	LINEAR
Discovery site	Lincoln Lab ETS
Discovery date	5 October 2002
Designations
Minor planet category	NEO · Apollo
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	2017 days (5.52 yr)
Aphelion	2.8505 AU (426.43 Gm)
Perihelion	0.86543 AU (129.466 Gm)
Semi-major axis	1.8580 AU (277.95 Gm)
Eccentricity	0.53421
Orbital period (sidereal)	2.53 yr (925.03 d)
Mean anomaly	55.037°
Mean motion	0° 23m 21.048s / day
Inclination	4.9211°
Longitude of ascending node	335.73°
Argument of perihelion	125.66°
Earth MOID	0.00603808 AU (903,284 km)
Jupiter MOID	2.35661 AU (352.544 Gm)
Physical characteristics
Dimensions	300 meters[2] 270–590 meters H
Synodic rotation period	9.455 h (0.3940 d)[2][1]
Absolute magnitude (H)	20.2[1]

Description

Due to the proximity of its orbit to Earth and its estimated size, this object has been classified as a potentially hazardous asteroid (PHA) by the Minor Planet Center in Cambridge, Massachusetts. In November 2006 there were 823 PHAs known. As of October 2011^[update], there are 1261 PHAs known.[3] 2002 TD₆₆ was removed from the Sentry Risk Table on October 10, 2002.[4] A Doppler observation[1] has helped produce a well known trajectory with a condition code (Uncertainty Parameter U) of 0.[1]

Based on an absolute magnitude (H) of 20.2,[1] the asteroid is estimated to be between 270 and 590 meters in diameter. Radar astronomy shows it is a contact binary asteroid with a diameter of 300 meters and a rotation period of 9.5 hours.[2]

On February 26, 2008, 2002 TD₆₆ passed 0.04282 AU (6,406,000 km; 3,980,000 mi) from Earth.[5] The asteroid also comes close to Venus, Mars, and dwarf planet Ceres.[5]

References

External links

• Orbital path diagram of 2002 TD₆₆ (0.04 AU from Earth on 25 February 2008)
• Lightcurve plot of (179806) 2002 TD66, Palmer Divide Observatory, B. D. Warner (2008)
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Sormano Astronomical Observatory: Minor Body Priority List
• Minimum Orbital Intersection Distance
• Closest Approaches to the Earth by Minor Planets
• (179806) 2002 TD66 at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
• (179806) 2002 TD66 at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical Properties · Summary
• (179806) 2002 TD66 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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