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JPL Small-Body Database Browser
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20575 (1999 RL142)
Classification: Main-belt Asteroid          SPK-ID: 2020575
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07521440371847651 4.0415e-08  
a 2.461017056372106 1.0728e-08 au
q 2.275913125936077 9.731e-08 au
i 6.438852091351675 4.6868e-06 deg
node 28.32288526954207 3.1438e-05 deg
peri 134.8631549104898 4.1363e-05 deg
M 225.5314443953199 2.6747e-05 deg
tp 2459127.230663556253
(2020-Oct-04.73066356)
0.0001054 TDB
period 1410.166399330695
3.86
9.2212e-06
2.525e-08
d
yr
n .2552890213317139 1.6693e-09 deg/d
Q 2.646120986808134 1.1535e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1707  
   data-arc span      18231 days (49.91 yr)  
   first obs. used      1970-01-04  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4786  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:45:06  

Additional Information
 Earth MOID = 1.28804 au 
 Jupiter MOID = 2.3272 au 
 T_jup = 3.477 
[ 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 13.7   n/a MPO309315  
diameter diameter 5.154 km 0.250 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.201   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20575 (1999 RL142)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RL142 = 1970 AL = 1990 HN4 = 1994 JP8 = 1998 KD39 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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