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20500 Avner (1999 RP3)
Classification: Main-belt Asteroid          SPK-ID: 2020500
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1430352035595321 2.4943e-08  
a 2.307307204498911 6.5325e-09 au
q 1.977281048829034 5.8941e-08 au
i 5.280485432992817 3.1325e-06 deg
node 204.7359322643351 3.2396e-05 deg
peri 232.7243644743356 3.4746e-05 deg
M 235.7889250555711 1.3188e-05 deg
tp 2459442.186758515536
(2021-Aug-15.68675852)
4.7736e-05 TDB
period 1280.13732379928
3.50
5.4365e-06
1.488e-08
d
yr
n .2812198295504479 1.1943e-09 deg/d
Q 2.637333360168788 7.4669e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1982  
   data-arc span      8758 days (23.98 yr)  
   first obs. used      1996-11-06  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49135  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:02:28  

Additional Information
 Earth MOID = .997529 au 
 Jupiter MOID = 2.61256 au 
 T_jup = 3.568 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457386.5 (2015-Dec-30.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1442310211374097 2.5008e-08  
q 1.973188657059567 5.9179e-08 au
tp 2456882.488532561711
(2014-Aug-12.98853256)
4.3073e-05 TDB
node 204.8322205506431 3.2355e-05 deg
peri 232.4073885158273 3.4663e-05 deg
i 5.285013113739642 3.1348e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1982  
   data-arc span      8758 days (23.98 yr)  
   first obs. used      1996-11-06  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49135  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:02:28  

Additional Information
 Jupiter MOID = 2.61256 au 
 T_jup = 3.568 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.254115899550161E-16 -1.473755923317826E-15 -8.886756852378015E-14 2.316339562480745E-15 -1.733386541139895E-14 -3.781569785574486E-17
q -1.473755923317826E-15 3.502143423532075E-15 2.695676521315589E-13 -5.261421814298964E-15 6.037061156787992E-14 2.054618006114588E-16
tp -8.886756852378015E-14 2.695676521315589E-13 1.855244401573906E-9 -2.474981859711344E-12 5.435375709156644E-10 1.249810170552671E-12
node 2.316339562480745E-15 -5.261421814298964E-15 -2.474981859711344E-12 1.04686696626065E-9 -1.042720939235453E-9 -2.066391228695574E-11
peri -1.733386541139895E-14 6.037061156787992E-14 5.435375709156644E-10 -1.042720939235453E-9 1.201540663870715E-9 2.093777478255902E-11
i -3.781569785574486E-17 2.054618006114588E-16 1.249810170552671E-12 -2.066391228695574E-11 2.093777478255902E-11 9.826900313513154E-12

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO337431  
diameter diameter 2.956 km 0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.292   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20500 Avner           Discovered 1999 Sept. 4 by the Catalina Sky Survey.
Lillian I. Avner (b. 1952), Emergency Medicine Physician at Martin Memorial and Medical Director of Martin County Fire Rescue, dedicated her life to helping people. Lil's passion and leadership guided the ER and Fire Rescue from infancy to maturity. She contributed to thousands of lives saved through her decades of service.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2018-05-29Last Updated: 2018-09-17

Alternate Designations
 1999 RP3 = 1996 VP8 = 1998 HL81 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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