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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05085565204898573 4.8196e-08  
a 3.176603556140598 2.3215e-08 au
q 3.015055310991941 1.5479e-07 au
i 11.7494264653384 5.1624e-06 deg
node 125.6717766222751 2.8051e-05 deg
peri 187.8601773198818 6.7154e-05 deg
M 215.7387688743277 6.3912e-05 deg
tp 2459429.186162232098
(2021-Aug-02.68616223)
0.00037026 TDB
period 2067.96390184463
5.66
2.2669e-05
6.206e-08
d
yr
n .174084276654384 1.9083e-09 deg/d
Q 3.338151801289255 2.4395e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1310  
   data-arc span      8574 days (23.47 yr)  
   first obs. used      1995-11-18  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49144  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:53:52  

Additional Information
 Earth MOID = 2.00025 au 
 Jupiter MOID = 1.90624 au 
 T_jup = 3.166 
[ 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 13.0   n/a MPO384931  
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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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