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JPL Small-Body Database Browser
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20546 (1999 RA105)
Classification: Main-belt Asteroid          SPK-ID: 2020546
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09317070837771954 4.1785e-08  
a 3.119798062841368 1.7769e-08 au
q 2.829124267331001 1.3033e-07 au
i 3.880911407640707 4.5926e-06 deg
node 224.2164860248234 5.9941e-05 deg
peri 313.7597901421997 6.4369e-05 deg
M 37.47001597070063 2.2395e-05 deg
tp 2458391.006993060784
(2018-Sep-29.50699306)
0.00012539 TDB
period 2012.742203181599
5.51
1.7195e-05
4.708e-08
d
yr
n .1788604618271221 1.528e-09 deg/d
Q 3.410471858351736 1.9424e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1706  
   data-arc span      9399 days (25.73 yr)  
   first obs. used      1993-08-16  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47719  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:53:17  

Additional Information
 Earth MOID = 1.83484 au 
 Jupiter MOID = 1.5729 au 
 T_jup = 3.206 
[ 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 13.2   n/a MPO358826  
diameter diameter 11.436 km 0.454 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.085   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20546 (1999 RA105)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RA105 = 1993 QH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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