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JPL Small-Body Database Browser
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21545 Koirala (1998 QO33)
Classification: Main-belt Asteroid          SPK-ID: 2021545
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01292352453754518 3.1945e-08  
a 3.035970550578749 1.7346e-08 au
q 2.99673511067308 9.4358e-08 au
i 8.854117355919163 4.5275e-06 deg
node 189.9132231413045 2.3805e-05 deg
peri 46.17806880850625 0.00018496 deg
M 65.38627687173953 0.00018324 deg
tp 2458249.563236105578
(2018-May-11.06323611)
0.00098352 TDB
period 1932.167437057363
5.29
1.6559e-05
4.534e-08
d
yr
n .1863192563416088 1.5968e-09 deg/d
Q 3.075205990484418 1.757e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1433  
   data-arc span      10467 days (28.66 yr)  
   first obs. used      1991-04-10  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51106  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:52:36  

Additional Information
 Earth MOID = 1.99448 au 
 Jupiter MOID = 1.89 au 
 T_jup = 3.223 
[ 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 13.6   n/a MPO492976  

21545 Koirala           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Pratistha Koirala (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for her botany project. She attends the Edwin O. Smith High School, Storrs Mansfield, Connecticut, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060711/MPCPages.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1998 QO33 = 1993 SZ11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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