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442083 (2010 SQ21)
Classification: Main-belt Asteroid          SPK-ID: 2442083
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1734521497573757 1.235e-07  
a 3.086873194147497 5.452e-08 au
q 2.551448402594196 4.0412e-07 au
i .2792157680620955 1.2423e-05 deg
node 185.5289549616319 0.002135 deg
peri 173.0329687695035 0.0021353 deg
M 294.244929760814 3.7409e-05 deg
tp 2459362.328986975082
(2021-May-27.82898697)
0.00021235 TDB
period 1980.964126982311
5.42
5.2481e-05
1.437e-07
d
yr
n .1817296916670589 4.8145e-09 deg/d
Q 3.622297985700797 6.3976e-08 au
  Orbit Determination Parameters
   # obs. used (total)      66  
   data-arc span      6726 days (18.41 yr)  
   first obs. used      1999-09-14  
   last obs. used      2018-02-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .813  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 13:46:03  

Additional Information
 Earth MOID = 1.54777 au 
 Jupiter MOID = 1.82957 au 
 T_jup = 3.203 
[ 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 17.0   n/a MPO437719  

442083 (2010 SQ21)          Discovered 1999-Sep-14 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

[ show close-approach data ]
Alternate Designations
 2010 SQ21 = 1999 RB189 = 2005 WZ128 = 2007 CQ77 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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