Astronomy:(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) |
| |{{{apsis}}}|helion}} | 2.8505 astronomical unit|AU (426.43 Gm) |
| |{{{apsis}}}|helion}} | 0.86543 AU (129.466 Gm) |
| 1.8580 AU (277.95 Gm) | |
| Eccentricity | 0.53421 |
| Orbital period | 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° |
| 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 |
| Rotation period | 9.455 h (0.3940 d)[2][1] |
| Absolute magnitude (H) | 20.2[1] |
(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.
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), 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 astronomical unit|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
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "JPL Small-Body Database Browser: 179806 (2002 TD66)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002TD66. Retrieved 7 April 2016.
- ↑ 2.0 2.1 2.2 Dr. Lance A. M. Benner (2013-11-18). "Binary and Ternary near-Earth Asteroids detected by radar". NASA/JPL Asteroid Radar Research. http://echo.jpl.nasa.gov/~lance/binary.neas.html. Retrieved 2014-03-01.
- ↑ "Potentially Hazard Asteroids". http://neo.jpl.nasa.gov/neo/groups.html. Retrieved 2011-10-24.
- ↑ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. http://neo.jpl.nasa.gov/risk/removed.html. Retrieved 2011-10-24.
- ↑ 5.0 5.1 "JPL Close-Approach Data: 179806 (2002 TD66)". https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002TD66;cad=1#cad. Retrieved 2006-11-01.
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 )
- 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
- (179806) 2002 TD66 at the JPL Small-Body Database
 |  |
