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| physical_characteristics = yes
| physical_characteristics = yes
| dimensions = 280–620 meters<ref name="h"/>
| dimensions = 280–620 meters<ref name="h"/>
| rotation = 3.1 hours
| abs_magnitude = 19.8<ref name="jpldata"/>
| abs_magnitude = 19.8<ref name="jpldata"/>
}}
}}

Revision as of 04:51, 22 October 2015

2015 TB145
Discovery[1]
Discovered byPan-STARRS (F51)
Discovery date10 October 2015
Designations
Designation
2015 TB145
Apollo NEO,
PHA[2]
Orbital characteristics[2]
Epoch 2015-Oct-14
Uncertainty parameter 8
Observation arc11 days
Aphelion3.93 AU (Q)
Perihelion0.2947 AU (q)
2.11 AU (a)
Eccentricity0.861
3.07 yr
341.2° (M)
Inclination39.70°
37.74°
121.5°
Physical characteristics
Dimensions280–620 meters[3]
3.1 hours
19.8[2]

2015 TB145 (also written 2015 TB145) is a near-Earth asteroid roughly 280–620 meters (900–2,000 feet) in diameter that will pass about 1.27 lunar distance from Earth on 31 October 2015 around 17:00 UT.[4] During closest approach to Earth the asteroid will reach about apparent magnitude 10,[5] but the Moon will be a 80% waning gibbous. At peak brightness, the asteroid will be a challenging target for amateur astronomers with small telescopes, but it will be best seen in the Northern hemisphere. On 31 October 2015 at 11:00 UT (4AM PDT) the asteroid will be in the constellation of Taurus about 9 degrees from the Moon.[5] After closest approach the asteroid will quickly become too faint and be too close to the Sun in the sky to be seen.[6]

Overview

The asteroid was first observed on 10 October 2015 by Pan-STARRS at an apparent magnitude of 20 using a 1.8-meter (71 in) Ritchey–Chrétien telescope.[1][7] On 31 October 2015 the asteroid will pass about 0.0019 AU (280,000 km; 180,000 mi) from the Moon and then pass about 0.0032 AU (480,000 km; 300,000 mi) from Earth.[4]

The close approach will be studied with radar using Goldstone and the Green Bank Telescope.[6]

The last approach this close by an object (with absolute magnitude < 20) was 2004 XP14 on 3 July 2006 at 1.1 lunar distances.[6][a] The next object this large known to pass this close to Earth is (137108) 1999 AN10 that will pass about 1 lunar distance from Earth on 7 August 2027.[6]

Notes

  1. ^ (308635) 2005 YU55 (~360 meters in diameter) passed 0.8 lunar distances (0.00217AU) from Earth on 8 November 2011, but has a fainter absolute magnitude (H) of 21.9. 2005 YU55 has a low albedo of 0.04 and could be larger than 2015 TB145 depending on the albedo of 2015 TB145.

References

  1. ^ a b "MPEC 2015-T86 : 2015 TB145". IAU Minor Planet Center. 2015-10-13. Retrieved 2015-10-14. (K15TE5B)
  2. ^ a b c "JPL Small-Body Database Browser: (2015 TB145)" (last observation: 2015-10-21; arc: 11 days). Jet Propulsion Laboratory. Retrieved 2015-10-14.
  3. ^ "Absolute Magnitude (H)". NASA/JPL. Retrieved 2015-10-14.
  4. ^ a b "JPL Close-Approach Data: (2015 TB145)" (last observation: 2015-10-21; arc: 11 days). Retrieved 2015-10-14.
  5. ^ a b "2015TB145 Ephemerides for 15 October 2015 through 31 October 2015". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 2015-10-14.
  6. ^ a b c d Dr. Lance A. M. Benner (14 October 2015). "Goldstone Radar Observations Planning: 2009 FD and 2015 TB145". NASA/JPL Asteroid Radar Research. Retrieved 2015-10-15. {{cite web}}: External link in |author= (help)
  7. ^ "2015 TB145 Orbit". IAU Minor Planet Center. Retrieved 2015-10-14.

External links

Retrieved from "https://en.wikipedia.org/w/index.php?title=2015_TB145&oldid=686919857"