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JPL Small-Body Database Browser
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390983 (2005 SO21)
Classification: Main-belt Asteroid          SPK-ID: 2390983
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2162315066295853 8.3859e-08  
a 3.108048813338183 8.1309e-08 au
q 2.435990735751773 2.4869e-07 au
i 16.06915040652576 1.4432e-05 deg
node 203.0292002962338 3.1073e-05 deg
peri 80.97024861151017 5.0446e-05 deg
M 320.0446527999538 5.1935e-05 deg
tp 2459222.627629268200
(2021-Jan-08.12762927)
0.00029522 TDB
period 2001.382847111374
5.48
7.8537e-05
2.15e-07
d
yr
n .1798756297524951 7.0586e-09 deg/d
Q 3.780106890924593 9.8891e-08 au
  Orbit Determination Parameters
   # obs. used (total)      121  
   data-arc span      4490 days (12.29 yr)  
   first obs. used      2005-09-25  
   last obs. used      2018-01-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63107  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 04:41:10  

Additional Information
 Earth MOID = 1.48376 au 
 Jupiter MOID = 1.64502 au 
 T_jup = 3.124 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456948.5 (2014-Oct-18.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2146423249384327 8.394e-08  
q 2.442048782516393 2.4863e-07 au
tp 2457219.649832558196
(2015-Jul-16.14983256)
0.00024266 TDB
node 203.0548988560182 3.1065e-05 deg
peri 80.92333597360455 5.063e-05 deg
i 16.06626158601514 1.443e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      121  
   data-arc span      4490 days (12.29 yr)  
   first obs. used      2005-09-25  
   last obs. used      2018-01-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63107  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 04:41:10  

Additional Information
 Jupiter MOID = 1.64502 au 
 T_jup = 3.124 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.045993588475221E-15 -2.022263705016499E-14 -5.571670362759806E-13 7.572687962275431E-15 -3.424957462788503E-13 1.830092437993645E-14
q -2.022263705016499E-14 6.18156732170334E-14 1.097611800234021E-11 -2.977082516019307E-14 2.411688198529398E-12 -3.459389781765438E-14
tp -5.571670362759806E-13 1.097611800234021E-11 5.888146333842695E-8 -6.917116452606033E-11 9.716677531252963E-9 -2.479255980387691E-11
node 7.572687962275431E-15 -2.977082516019307E-14 -6.917116452606033E-11 9.650210564621659E-10 -9.375007824078811E-10 4.896869881484117E-11
peri -3.424957462788503E-13 2.411688198529398E-12 9.716677531252963E-9 -9.375007824078811E-10 2.563408002757098E-9 -5.166381742255586E-11
i 1.830092437993645E-14 -3.459389781765438E-14 -2.479255980387691E-11 4.896869881484117E-11 -5.166381742255586E-11 2.082294259570208E-10

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 15.6   n/a MPO342135  

390983 (2005 SO21)          Discovered 2005-Sep-25 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-04-17

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