1991 BA

1991 BA
Discovery[1][2][3]
Discovered bySpacewatch
Discovery siteKitt Peak Obs.
Discovery date18 January 1991
Designations
1991 BA
Apollo · NEO
Orbital characteristics[1]
Epoch 18 January 1991 (JD 2448274.5)
Uncertainty parameter 9
Observation arc4.6 hours[4]
Aphelion3.662±0.430 AU
Perihelion0.7153±0.0122 AU
2.189±0.257 AU
Eccentricity0.6732±0.0440
3.24±0.57 yr (1,183±208 days)
346.836°±2.609°
0° 18m 15.655s / day
Inclination1.938°±0.104°
118.880°±0.012°
70.688°±0.260°
Earth MOID0.0003 AU · 0.1 LD
Physical characteristics
Dimensions5–10 m[5][4]
28.6[1]

1991 BA is a sub-kilometer asteroid, classified as near-Earth object of the Apollo group that was first observed by Spacewatch on 18 January 1991, and passed within 160,000 km (100,000 mi) of Earth.[2][3] This is a little less than half the distance to the Moon. With a 5-hour observation arc the asteroid has a poorly constrained orbit and is considered lost. It could be a member of the Beta Taurids.[6]

  1. ^ a b c Cite error: The named reference jpldata 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 Cite error: The named reference MPC-1991BA was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference summary was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Scotti1991 was invoked but never defined (see the help page).
  6. ^ Peter Jenniskens Meteor Showers and their Parent Comets pg 463 fig 25.7