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129872 (1999 RW212)
Classification: Main-belt Asteroid          SPK-ID: 2129872
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1031761970859849 5.1506e-08  
a 2.519016645374089 1.5679e-08 au
q 2.259114087508095 1.2862e-07 au
i 12.29535250280408 6.4427e-06 deg
node 341.7628823015963 2.7246e-05 deg
peri 305.6187886446283 4.6379e-05 deg
M 138.6853595578498 4.0505e-05 deg
tp 2458437.934495063394
(2018-Nov-15.43449506)
0.00016397 TDB
period 1460.309743024458
4.00
1.3634e-05
3.733e-08
d
yr
n .2465230419228741 2.3016e-09 deg/d
Q 2.778919203240083 1.7297e-08 au
  Orbit Determination Parameters
   # obs. used (total)      899  
   data-arc span      7386 days (20.22 yr)  
   first obs. used      1999-09-08  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49792  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 11:52:53  

Additional Information
 Earth MOID = 1.26697 au 
 Jupiter MOID = 2.48752 au 
 T_jup = 3.418 
[ 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 15.1   n/a MPO502833  
diameter diameter 2.729 km 0.377 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.251   0.094 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

129872 (1999 RW212)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1999 RW212 = 2000 YQ125 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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