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(179806) 2002 Td66

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Title: (179806) 2002 Td66  
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(179806) 2002 Td66

(179806) 2002 TD66
Discovered by LINEAR (704)
Discovery date October 5, 2002
Orbital characteristics
Epoch 2011-Aug-27
(JD 2455800.5)
JPL 56
Aphelion 2.8499 AU
Perihelion 0.86573 AU
1.8578 AU
Eccentricity 0.53400
2.53 years
152.36° (M)
Inclination 4.9197°
Physical characteristics
Dimensions 300 meters[1]
270–590 meters H
9.455 hr[1][2]

2002 TD66 (also written 2002 TD66) is a near-Earth asteroid, discovered on October 5, 2002, by the LINEAR project.[2] It was announced on October 7, 2002, and appeared later that day on the JPL current risk page.

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, there are 1261 PHAs known.[3] 2002 TD66 was removed from the Sentry Risk Table on October 10, 2002.[4] A Doppler observation[2] has helped produce a well known trajectory with a condition code (Uncertainty Parameter U) of 0.[2]

Based on an absolute magnitude (H) of 20.2,[2] 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.[1]

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]


  1. ^ a b c Dr. Lance A. M. Benner (2013-11-18). "Binary and Ternary near-Earth Asteroids detected by radar". NASA/JPL Asteroid Radar Research. Retrieved 2014-03-01. 
  2. ^ a b c d e f "JPL Small-Body Database Browser: 179806 (2002 TD66)" (2008-04-13 last obs). Jet Propulsion Laboratory. Retrieved 2006-11-01. 
  3. ^ "Potentially Hazard Asteroids". Retrieved 2011-10-24. 
  4. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2011-10-24. 
  5. ^ a b "JPL Close-Approach Data: 179806 (2002 TD66)" (2008-04-13 last obs). Retrieved 2006-11-01. 

External links

  • Lightcurve for TD66 in 2008 from The Palmer Divide Observatory
  • Discovery Circumstances
  • Sormano Astronomical Observatory: Minor Body Priority List
  • Minimum Orbital Intersection Distance
  • Closest Approaches to the Earth by Minor Planets
  • Orbital simulation from JPL (Java)
  • on February 25th, 20082002 TD66GIF of (0.04AU from Earth)
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