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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07486162255995917 1.2288e-08  
a 2.460980366357063 9.1817e-09 au
q 2.27674738304337 3.3204e-08 au
i 6.438298098830712 6.782e-07 deg
node 28.30947648529659 2.9191e-06 deg
peri 134.719948664011 1.2593e-05 deg
M 18.81569230870343 1.3041e-05 deg
tp 2459126.798156332141
(2020-Oct-04.29815633)
5.1029e-05 TDB
period 1410.134864299213
3.86
7.8916e-06
2.161e-08
d
yr
n .2552947303936827 1.4287e-09 deg/d
Q 2.645213349670755 9.8691e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2019  
   data-arc span      18699 days (51.20 yr)  
   first obs. used      1970-01-04  
   last obs. used      2021-03-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47195  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:24:10  

Additional Information
 Earth MOID = 1.28811 au 
 Jupiter MOID = 2.32582 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 13.73   n/a E2021B10  
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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