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442617 (2012 RR20)
Classification: Main-belt Asteroid          SPK-ID: 2442617
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1046651308143413 6.6164e-08  
a 2.283366947803906 1.8878e-08 au
q 2.044378047514868 1.4611e-07 au
i 4.927111254198268 6.0583e-06 deg
node 282.5470062626737 9.9866e-05 deg
peri 27.64115184176057 0.00011147 deg
M 116.1736357299558 4.5256e-05 deg
tp 2458593.806648639749
(2019-Apr-20.30664864)
0.00015834 TDB
period 1260.265339633664
3.45
1.5629e-05
4.279e-08
d
yr
n .2856541306647737 3.5424e-09 deg/d
Q 2.522355848092946 2.0853e-08 au
  Orbit Determination Parameters
   # obs. used (total)      137  
   data-arc span      7263 days (19.89 yr)  
   first obs. used      2000-01-08  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49302  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 22:53:03  

Additional Information
 Earth MOID = 1.03113 au 
 Jupiter MOID = 2.67832 au 
 T_jup = 3.592 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457549.5 (2016-Jun-10.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1052671675176696 6.6121e-08  
q 2.04291742165355 1.4616e-07 au
tp 2457334.477517360443
(2015-Nov-07.97751736)
0.00015827 TDB
node 282.5922522165928 9.9966e-05 deg
peri 27.82043316860066 0.00011145 deg
i 4.924547081080315 6.056e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      137  
   data-arc span      7263 days (19.89 yr)  
   first obs. used      2000-01-08  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49302  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 22:53:03  

Additional Information
 Jupiter MOID = 2.67832 au 
 T_jup = 3.592 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.372038375986533E-15 -9.606888230348094E-15 1.871589161248732E-12 2.224447034202209E-14 4.197510786526367E-13 -7.403664494358106E-15
q -9.606888230348094E-15 2.136299555482062E-14 -4.558151058465599E-12 -4.915327338003518E-14 -1.055572682649467E-12 1.743234218524637E-14
tp 1.871589161248732E-12 -4.558151058465599E-12 2.504857814237021E-8 -7.882794627371386E-11 7.865574490886333E-9 -3.166758225552965E-11
node 2.224447034202209E-14 -4.915327338003518E-14 -7.882794627371386E-11 9.993126602553236E-9 -9.981668731662674E-9 4.113005458621E-11
peri 4.197510786526367E-13 -1.055572682649467E-12 7.865574490886333E-9 -9.981668731662674E-9 1.242213839114762E-8 -5.074770475090777E-11
i -7.403664494358106E-15 1.743234218524637E-14 -3.166758225552965E-11 4.113005458621E-11 -5.074770475090777E-11 3.66752630841445E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.4   n/a MPO450446  

442617 (2012 RR20)          Discovered 2009-Nov-17 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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