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20501 (1999 RD10)
Classification: Main-belt Asteroid          SPK-ID: 2020501
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1991849768020924 3.5352e-08  
a 2.535149107128413 1.1319e-08 au
q 2.030185491035195 8.6951e-08 au
i 6.97589276700814 4.1774e-06 deg
node 185.1778495709505 4.1358e-05 deg
peri 195.0281685682282 4.3963e-05 deg
M 60.75369752772831 1.6745e-05 deg
tp 2458951.686521694080
(2020-Apr-12.18652169)
6.8269e-05 TDB
period 1474.360505370884
4.04
9.8741e-06
2.703e-08
d
yr
n .2441736594873313 1.6353e-09 deg/d
Q 3.040112723221631 1.3574e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1470  
   data-arc span      11685 days (31.99 yr)  
   first obs. used      1989-03-03  
   last obs. used      2021-02-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51425  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:22:32  

Additional Information
 Earth MOID = 1.03195 au 
 Jupiter MOID = 2.42126 au 
 T_jup = 3.410 
[ 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 14.3   n/a MPO347682  
diameter diameter 3.181 km 0.408 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.252   0.148 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20501 (1999 RD10)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RD10 = 1989 EP12 = 1991 PU21 = 1998 HM82 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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