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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05116424571814651 4.7622e-08  
a 3.176788609282863 2.248e-08 au
q 3.014250616282906 1.5324e-07 au
i 11.74965100368594 5.1186e-06 deg
node 125.6719041858569 2.7935e-05 deg
peri 187.7004654346864 6.6589e-05 deg
M 285.5677172710144 6.3578e-05 deg
tp 2459428.102011720041
(2021-Aug-01.60201172)
0.0003668 TDB
period 2068.144608431689
5.66
2.1952e-05
6.01e-08
d
yr
n .174069065834325 1.8477e-09 deg/d
Q 3.33932660228282 2.363e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1343  
   data-arc span      8843 days (24.21 yr)  
   first obs. used      1995-11-18  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49498  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 23:09:54  

Additional Information
 Earth MOID = 2.00024 au 
 Jupiter MOID = 1.90678 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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