(7482) 1994 PC1

(7482) 1994 PC1
Orbit with positions Jan 2020
Discovery[1]
Discovered byR. H. McNaught
Discovery siteSiding Spring Obs.
Discovery date9 August 1994
Designations
(7482) 1994 PC1
1994 PC1
Apollo · NEO · PHA[1][2]
Orbital characteristics[1]
Epoch 2022-Jan-21 (JD 2459600.5)
Uncertainty parameter 0
Observation arc47.23 yr (17,251 days)
Earliest precovery date22 September 1974
Aphelion1.7935 AU
Perihelion0.9042 AU
1.3488 AU
Eccentricity0.3297
1.56 yr (572 days)
337.27°
0° 37m 51.6s / day
Inclination33.479°
117.88°
47.477°
Earth MOID0.00054 AU (0.21 LD)
Mars MOID0.139 AU (20.8 million km)[2]
Physical characteristics
1.052±0.303 km[3]
1.30 km (calculated)[4]
2.5999 h[5]
0.277±0.185[3]
0.20 (assumed)[4]
SMASS = S[1][4]
16.6[1][4] · 16.80±0.3[3]

(7482) 1994 PC1 is a stony asteroid and near-Earth object, currently estimated to be the most potentially hazardous asteroid over the next 1000 years.[6][7] It is in the Apollo group, approximately 1.1 kilometers in diameter. It was discovered on 9 August 1994, by astronomer Robert McNaught at the Siding Spring Observatory in Coonabarabran, Australia.[2] With an observation arc of 47 years it has a very well known orbit and was observed by Goldstone radar in January 1997.[8]

Of all the known asteroids larger than 1 km, 1994 PC1 has the largest probability of a “deep close encounter” with us over the next 1000 years. It has a close encounter with Earth in 2525, after which the uncertainty of its orbit increases.[6]

  1. ^ a b c d e Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Mainzer-2012 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference lcdb was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Pravec-1998b was invoked but never defined (see the help page).
  6. ^ a b Carter, Jamie (29 May 2023). "We Are (Probably) Safe From Asteroids For 1,000 Years, Say Scientists". Forbes. Retrieved 29 September 2024.
  7. ^ Fuentes-Muñoz, Oscar; Scheeres, Daniel J.; Farnocchia, Davide; Park, Ryan S. (12 June 2023). "The Hazardous km-sized NEOs of the Next Thousands of Years". The Astronomical Journal. 166 (1): 10. arXiv:2305.04896. Bibcode:2023AJ....166...10F. doi:10.3847/1538-3881/acd378. ISSN 1538-3881.
  8. ^ Cite error: The named reference Goldstone was invoked but never defined (see the help page).