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| name = {{mp|(214869) 2007 PA|8}}
| name = {{mp|(214869) 2007 PA|8}}
| background = #FFC2E0
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| image = [[File:Pa8radar.jpg|240px]]
| image = Pa8radar.jpg
| caption = {{longitem|[[Goldstone Deep Space Network|Goldstone]] radar image of {{mp|2007 PA|8}} during its 2012 close approach}}
| caption = {{longitem|[[Goldstone Deep Space Network|Goldstone]] radar image of {{mp|2007 PA|8}} during its 2012 close approach}}
| discovery_ref = &thinsp;<ref name="jpldata" />
| discovery_ref = &thinsp;<ref name="jpldata" />

Revision as of 04:02, 19 May 2017

(214869) 2007 PA8
Goldstone radar image of 2007 PA8 during its 2012 close approach
Discovery [1]
Discovered byLINEAR
Discovery siteLincoln Lab's ETS
Discovery date9 August 2007
Designations
(214869) 2007 PA8
2007 PA8
Apollo · NEO · PHA [1][2]
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc10.83 yr (3,957 days)
Aphelion4.6928 AU
Perihelion0.9570 AU
2.8249 AU
Eccentricity0.6612
4.75 yr (1,734 days)
319.90°
0° 12m 27.36s / day
Inclination1.9841°
142.63°
292.33°
Earth MOID0.0245 AU
Jupiter MOID0.6333 AU
Physical characteristics
Dimensions1.35±0.07 km[3]
1.38 km (calculated)[4]
1.4±0.2 km[5]
85±12 h[4]
95±5 h[6]
101.209 h[1]
101.325±1.2659 h[7]
102.24±0.48 h[3]
0.20 (assumed)[4]
0.29±0.08[5]
0.29±0.14[3]
C [6] · Q [5] · S [4]
B–V = 0.765±0.022[4]
V–R = 0.415±0.011[4]
V–I = 0.741±0.015[4]
16.2[5] · 16.216±0.002 (R)[7] · 16.30±0.52[3] · 16.4[1] · 16.47[6] · 16.67[4]

(214869) 2007 PA8 is an asteroid and slow rotator, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.4 kilometers in diameter.

It came within 6.5 million km (4 million miles, 17 lunar distances) of Earth on November 5, 2012.[8][9]

It was discovered on 9 August 2007, by the Lincoln Near-Earth Asteroid Research team (LINEAR) at the U.S. Lincoln Laboratory Experimental Test Site in Socorro, New Mexico.[2]

It was studied by the 70 m (230 ft) Goldstone Deep Space Network antenna as it came near Earth, which resulted in radar images and other data about the asteroid, such as its very long rotation period of approximately 100 hours.[9]

(214869) 2007 PA8 may be a dormant comet related to the November γ Pegasids meteor shower.[10]

See also

References

  1. ^ a b c d e "JPL Small-Body Database Browser: 214869 (2007 PA8)" (2013-05-13 last obs.). Jet Propulsion Laboratory. Retrieved 26 April 2017.
  2. ^ a b "214869 (2007 PA8)". Minor Planet Center. Retrieved 26 April 2017.
  3. ^ a b c d Brozovic, Marina; Benner, Lance A. M.; Magri, Christopher; Scheeres, Daniel J.; Busch, Michael W.; Giorgini, Jon D.; et al. (April 2017). "Goldstone radar evidence for short-axis mode non-principal-axis rotation of near-Earth asteroid (214869) 2007 PA8". Icarus. 286: 314–329. Bibcode:2017Icar..286..314B. doi:10.1016/j.icarus.2016.10.016. Retrieved 26 April 2017.
  4. ^ a b c d e f g h "LCDB Data for (214869)". Asteroid Lightcurve Database (LCDB). Retrieved 26 April 2017.
  5. ^ a b c d Fornasier, S.; Belskaya, I. N.; Perna, D. (April 2015). "The potentially hazardous Asteroid (214869) 2007 PA8: An unweathered L chondrite analog surface". Icarus. 250: 280–286. Bibcode:2015Icar..250..280F. doi:10.1016/j.icarus.2014.12.015. Retrieved 26 April 2017.
  6. ^ a b c Hicks, M.; Brewer, M.; Somers, J. (December 2012). "Broadband Photometry of 214869 (2007 PA8): A Slowly Rotating Potentially Hazardous Asteroid". The Astronomer's Telegram (4625). Bibcode:2012ATel.4625....1H. Retrieved 26 April 2017.
  7. ^ a b Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 26 April 2017.
  8. ^ Say Hello to Asteroid 2007 PA8 (Universe Today)
  9. ^ a b (214869) 2007 PA8 Goldstone Radar Observations Planning
  10. ^ Rudawska, Regina; Jenniskens, Peter (2014). "New meteor showers identified in the CAMS and SonotaCo meteoroid orbit surveys". Proceedings of the Meteoroids 2013 Conference Aug. 26-30, 2013, A.M. University, Poznan, Poland: 217. arXiv:1405.1769. Bibcode:2014me13.conf..217R.
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