(143649) 2003 QQ47

(143649) 2003 QQ47
Discovery[1]
Discovered byLINEAR
Discovery siteLincoln Lab's ETS
Discovery date24 August 2003
Designations
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc4285 days (11.73 yr)
Aphelion1.28834 AU (192.733 Gm)
Perihelion0.882430 AU (132.0096 Gm)
1.08538 AU (162.371 Gm)
Eccentricity0.18699
1.13 yr (413.02 d)
28.34 km/s
264.755°
0° 52m 17.846s / day
Inclination62.1021°
0.997990°
104.999°
Known satellitesS/2021 (143649) 1[3]
Earth MOID0.00253637 AU (379,436 km)
Physical characteristics
  • 0.995±0.42 km (system)[3]
  • 0.94±0.40 km (primary)[3]
  • 0.31±0.13 km (secondary)[3]
Mass2.0×1012 kg
2.6446±0.0007 h[3]
17.4[2]

(143649) 2003 QQ47, provisionally designated: 2003 QQ47, is a kilometer-sized asteroid and synchronous binary system, classified as near-Earth object and potentially hazardous asteroid of the Apollo group. It became briefly notable upon its discovery in late August 2003, when media outlets played up a very preliminary report that it had a 1 in 250,000 chance of impacting into Earth on 21 March 2014.[4] The discovery of a companion, approximately 310 meters (1,000 ft) in diameter, was announced in September 2021.

  1. ^ Cite error: The named reference MPEC2003-Q46 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference jpl-close was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference johnstonsarchive was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference QQ47 was invoked but never defined (see the help page).