21088 Chelyabinsk

21088 Chelyabinsk
Discovery [1]
Discovered byE. W. Elst
Discovery siteLa Silla Obs.
Discovery date30 January 1992
Designations
(21088) Chelyabinsk
Named after
Chelyabinsk [2] (city and meteor)
1992 BL2
NEO · Amor [1][2]
Mars-crosser
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc27.41 yr (10,012 days)
Aphelion2.1135 AU
Perihelion1.2996 AU
1.7065 AU
Eccentricity0.2384
2.23 yr (814 days)
318.92°
0° 26m 31.56s / day
Inclination38.455°
297.85°
27.133°
Earth MOID0.3083 AU · 120.1 LD
Physical characteristics
Dimensions2.79±0.10 km[3]
3.46±0.25 km[4]
4.23 km (taken)[5]
4.231±0.113 km[6][7]
4.232 km[8]
22.426±0.02 h[a][b]
22.49 h[a]
0.1794[8]
0.206[6]
0.257±0.038[4]
0.26±0.32[9]
0.37±0.06[3]
Q [10] · L [11] · S [5]
B–V = 0.855±0.073[12]
V–R = 0.464±0.015[12] 
V–I = 0.910±0.032[12]
13.86±0.14 (R)[a] · 14.00[11] · 14.2[6] · 14.29±0.24[13] · 14.3[1] · 14.35±0.149[5][8] · 14.40[4]

21088 Chelyabinsk (provisional designation 1992 BL2) is a stony asteroid and near-Earth object of the Amor group, approximately 4 kilometers in diameter. It was discovered on 30 January 1992, by Belgian astronomer Eric Elst at ESO's La Silla Observatory in northern Chile. The asteroid was named after the Russian city of Chelyabinsk and for its spectacular Chelyabinsk meteor event in 2013.[2] It is not related to the Chelyabinsk impactor.

  1. ^ a b c d 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 Cite error: The named reference Nugent-2016 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference AKARI was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference lcdb was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference WISE was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Mainzer-2011 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Pravec-2012b was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Thomas-2011b was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Thomas-2014 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Carry-2016 was invoked but never defined (see the help page).
  12. ^ a b c Cite error: The named reference Ye-2011 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Veres-2015 was invoked but never defined (see the help page).


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