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20542 (1999 RD94)
Classification: Main-belt Asteroid          SPK-ID: 2020542
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1781824806500432 1.8893e-08  
a 2.536005607184259 9.1517e-09 au
q 2.084133837153748 4.6737e-08 au
i 8.92956218500748 5.082e-07 deg
node 150.7485719950038 2.4509e-06 deg
peri 121.7669092637765 8.4308e-06 deg
M 162.5765398380116 7.0371e-06 deg
tp 2458534.339133765600
(2019-Feb-19.83913377)
2.7446e-05 TDB
period 1475.107737459133
4.04
7.9848e-06
2.186e-08
d
yr
n .2440499706279749 1.3211e-09 deg/d
Q 2.987877377214769 1.0782e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2380  
   data-arc span      9857 days (26.99 yr)  
   first obs. used      1994-03-12  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47491  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:34  

Additional Information
 Earth MOID = 1.08234 au 
 Jupiter MOID = 2.18786 au 
 T_jup = 3.409 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6   n/a MPO502321  
diameter diameter 5.291 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.233   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20542 (1999 RD94)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RD94 = 1994 EG3 = 1998 HJ136 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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