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JPL Small-Body Database Browser
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21088 Chelyabinsk (1992 BL2)
Classification: Amor [NEO]          SPK-ID: 2021088
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 456 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2385498136458037 6.1323e-08  
a 1.706448989074132 4.6699e-09 au
q 1.299375900734428 1.0665e-07 au
i 38.46013219072556 7.0031e-06 deg
node 297.8468622771564 6.9755e-06 deg
peri 27.09956484734111 1.1304e-05 deg
M 41.07067631634865 1.1309e-05 deg
tp 2458907.610260221123
(2020-Feb-28.11026022)
2.5305e-05 TDB
period 814.213675538731
2.23
3.3423e-06
9.151e-09
d
yr
n .4421443790683117 1.815e-09 deg/d
Q 2.113522077413836 5.7839e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2868  
   data-arc span      10692 days (29.27 yr)  
   first obs. used      1990-01-30  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .34813  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-12 08:31:36  

Additional Information
 Earth MOID = .308271 au 
 Jupiter MOID = 3.20907 au 
 T_jup = 3.920 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO347686  
diameter diameter 2.793 km 0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 22.49 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2002) http://www.asu.cas.cz/~ppravec/neo.htm]
[Pravec, P.; Wolf, M.; Sarounova, L. (2004) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.206   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  

21088 Chelyabinsk           Discovered 1992 Jan. 30 by E. W. Elst at the European Southern Observatory.
Chelyabinsk is a city in the Urals, Siberia. On 2013 February 15 a small asteroidal fragment exploded to the south of the city at a height of 30 km. More than 1500 people were injured from indirect effects of the explosion.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2013-08-21Last Updated: 2014-08-13

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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