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20612 (1999 RT237)
Classification: Main-belt Asteroid          SPK-ID: 2020612
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05243838339644105 3.717e-08  
a 3.182162778092745 1.8317e-08 au
q 3.015295306305234 1.2872e-07 au
i 11.74848667689573 3.2319e-06 deg
node 125.6697479559583 2.3726e-05 deg
peri 186.4808996842109 5.3805e-05 deg
M 355.6285241713704 4.8623e-05 deg
tp 2459421.677209557445
(2021-Jul-26.17720956)
0.00028003 TDB
period 2073.394843297457
5.68
1.7902e-05
4.901e-08
d
yr
n .1736282894518384 1.4991e-09 deg/d
Q 3.349030249880256 1.9277e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1772  
   data-arc span      9349 days (25.60 yr)  
   first obs. used      1995-11-18  
   last obs. used      2021-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46121  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:01:05  

Additional Information
 Earth MOID = 2.00048 au 
 Jupiter MOID = 1.89471 au 
 T_jup = 3.164 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457332.5 (2015-Nov-06.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04992041737037956 3.744e-08  
q 3.019969612305553 1.2905e-07 au
tp 2457363.186793520550
(2015-Dec-06.68679352)
0.00029242 TDB
node 125.6913481831744 2.374e-05 deg
peri 188.3867999242286 5.5706e-05 deg
i 11.74705092791031 3.2319e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1772  
   data-arc span      9349 days (25.60 yr)  
   first obs. used      1995-11-18  
   last obs. used      2021-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46121  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:01:05  

Additional Information
 Jupiter MOID = 1.89471 au 
 T_jup = 3.164 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.401724311332002E-15 -4.799301582707989E-15 9.362740378466011E-13 -5.954010409564139E-16 2.253114735189857E-13 -8.61874248777174E-16
q -4.799301582707989E-15 1.665282073040417E-14 -3.189154966518646E-12 5.949020609092201E-15 -7.719437549963687E-13 4.011266787821491E-15
tp 9.362740378466011E-13 -3.189154966518646E-12 8.550747398355844E-8 7.856143760377033E-11 1.477616127300205E-8 2.977305053345733E-11
node -5.954010409564139E-16 5.949020609092201E-15 7.856143760377033E-11 5.635694802956624E-10 -5.37822963538579E-10 -1.56256201561149E-12
peri 2.253114735189857E-13 -7.719437549963687E-13 1.477616127300205E-8 -5.37822963538579E-10 3.103153813909228E-9 6.699061319870371E-12
i -8.61874248777174E-16 4.011266787821491E-15 2.977305053345733E-11 -1.56256201561149E-12 6.699061319870371E-12 1.044512529696624E-11

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 13.04   n/a E2021B10  
diameter diameter 9.729 km 0.297 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.142   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20612 (1999 RT237)          Discovered 1999-Sep-08 by CSS at Catalina
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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