Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
21088 Chelyabinsk (1992 BL2)
Classification: Amor [NEO]          SPK-ID: 2021088
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 562 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .238553140222792 6.7891e-09  
a 1.706665298764715 2.5805e-09 au
q 1.299534932435123 1.1775e-08 au
i 38.45982258689133 6.517e-07 deg
node 297.8471058774589 8.7039e-07 deg
peri 27.12906450501779 2.0847e-06 deg
M 129.4581411372701 2.3344e-06 deg
tp 2458907.648245589427
(2020-Feb-28.14824559)
4.801e-06 TDB
period 814.3684951880927
2.23
1.847e-06
5.057e-09
d
yr
n .4420603229706863 1.0026e-09 deg/d
Q 2.113795665094307 3.1961e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3504  
   data-arc span      11393 days (31.19 yr)  
   first obs. used      1990-01-30  
   last obs. used      2021-04-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .33929  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:38:44  

Additional Information
 Earth MOID = .306522 au 
 Jupiter MOID = 3.20873 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 14.29   n/a E2021B10  
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. 2020-October); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-16 18:46 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin