(214869) 2007 PA8

(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.

(214869) 2007 PA₈

Goldstone radar image of 2007 PA8 during its 2012 close approach
Discovery[1]
Discovered by	LINEAR
Discovery site	Lincoln Lab's ETS
Discovery date	9 August 2007
Designations
MPC designation	(214869) 2007 PA8
Alternative designations	2007 PA8
Minor planet category	Apollo · NEO · PHA[1][2]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	10.83 yr (3,957 days)
Aphelion	4.6931 AU
Perihelion	0.9571 AU
Semi-major axis	2.8251 AU
Eccentricity	0.6612
Orbital period (sidereal)	4.75 yr (1,734 days)
Mean anomaly	1.4149°
Mean motion	0° 12m 27.36s / day
Inclination	1.9841°
Longitude of ascending node	142.63°
Argument of perihelion	292.33°
Earth MOID	0.0246 AU (9.6 LD)
Jupiter MOID	0.6318 AU
Physical characteristics
Mean diameter	1.35±0.07 km[3] 1.38 km (calculated)[4] 1.4±0.2 km[5]
Synodic rotation period	85±12 h[4] 95±5 h[6] 101.209 h[1] 101.325±1.2659 h[7] 102.24±0.48 h[3]
Geometric albedo	0.20 (assumed)[4] 0.29±0.08[5] 0.29±0.14[3]
Spectral type	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]
Absolute magnitude (H)	16.2[5] · 16.216±0.002 (R)[7] · 16.30±0.52[3] · 16.4[1] · 16.47[6] · 16.67[4]

It came within 6.5 million km (4 million miles, 17 lunar distances) of Earth on 5 November 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-meter (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]

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

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 9 May 2009.^[11] As of 2018, it has not been named.^[2]

See also

• List of asteroid close approaches to Earth

References

1. "JPL Small-Body Database Browser: 214869 (2007 PA8)" (2013-05-13 last obs.). Jet Propulsion Laboratory. Retrieved 1 June 2017.
2. "214869 (2007 PA8)". Minor Planet Center. Retrieved 26 April 2017.
3. 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. "LCDB Data for (214869)". Asteroid Lightcurve Database (LCDB). Retrieved 26 April 2017.
5. 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. 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. 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. Major, Jason (6 November 2012). "Say Hello to Asteroid 2007 PA8". Universe Today. Retrieved 21 October 2020.
9. (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.
11. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 February 2018.

External links

• NASA Radar Images Asteroid 2007 PA8 (5 November 2012)
• Nine Radar Images of Asteroid 2007 PA8 (26 November 2012)
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• (214869) 2007 PA8 at NeoDyS-2, Near Earth Objects—Dynamic Site
  • Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
• (214869) 2007 PA8 at ESA–space situational awareness
  • Ephemerides · Observations · Orbit · Physical properties · Summary
• (214869) 2007 PA8 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters