 Radar image of 2007 TU24 | |||||||||
| Discovery | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Discovered by | Catalina Sky Survey | ||||||||
| Discovery date | 11 October 2007 | ||||||||
| Designations | |||||||||
| Orbital characteristics[2] | |||||||||
| Epoch 13 January 2016 (JD 2457400.5) | |||||||||
| Uncertainty parameter 0 | |||||||||
| Observation arc | 1093 days (2.99 yr) | ||||||||
| Aphelion | 3.1343 AU (468.88 Gm) | ||||||||
| Perihelion | 0.95153 AU (142.347 Gm) | ||||||||
| 2.0429 AU (305.61 Gm) | |||||||||
| Eccentricity | 0.53423 | ||||||||
| 2.92 yr (1066.5 d) | |||||||||
| 267.95° | |||||||||
| 0° 20m 15.144s / day | |||||||||
| Inclination | 5.6232° | ||||||||
| 127.041° | |||||||||
| 334.254° | |||||||||
| Earth MOID | 0.000483062 AU (72,265.0 km) | ||||||||
| Jupiter MOID | 2.06887 AU (309.499 Gm) | ||||||||
| Physical characteristics | |||||||||
| Dimensions | ~250 meters[3] | ||||||||
| Mass | < 2.4×1010 kg[4] | ||||||||
Mean density | unknown | ||||||||
Equatorial surface gravity | unknown | ||||||||
Equatorial escape velocity | < 0.58 km/h[4] | ||||||||
| 26 h (1.1 d)[2] | |||||||||
| 0.24 | |||||||||
| |||||||||
2007 TU24 is an Apollo near-Earth asteroid that was discovered by the Catalina Sky Survey in Arizona on 11 October 2007. Imaging radar has estimated that it is 250 meters (820 ft) in diameter.[3] The asteroid passed 554,209 kilometer (344,370 mile or 1.4-lunar distance)[5] from Earth on 29 January 2008 at 08:33 UTC. (At the time of the passage it was believed the closest for any known potentially hazardous asteroid (PHA) of this size before 2027,[6] but in 2010 2005 YU55 was measured to be 400 meters in diameter.) At closest approach 2007 TU24 had an apparent magnitude of 10.3 and was about 50 times fainter than the naked eye can see. It required about a 3-inch (76 mm) telescope to be seen.[3]
- ^ a b JPL Small-Body Database Browser: 2007TU24
- ^ a b c Cite error: The named reference
jpl-closewas invoked but never defined (see the help page). - ^ a b c "NASA Scientists Get First Images of Earth Flyby Asteroid". NASA/JPL. 25 January 2008. Archived from the original on 29 January 2008. Retrieved 26 January 2008.[dead link]
- ^ a b radius of 0.125 km; volume of a sphere * maximum likely density of 3 g/cm3 (though it could be a loose rubble pile) yields an improbable mass of 2.45×1010 kg and an improbable escape velocity of 0.58 km/h.
- ^ "Asteroid Zooms by Earth". NASA/JPL. 29 January 2008. Archived from the original on 2 February 2008. Retrieved 30 January 2008.
- ^ Near-Earth Asteroid 2007 TU24 to Pass Close to Earth on Jan. 29 - Should be Observable with Modest Sized Telescopes Archived 2008-01-24 at the Wayback Machine