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JPL Small-Body Database Browser
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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1430352293736961 3.0804e-08  
a 2.307307208879701 7.2176e-09 au
q 1.97728099302201 7.072e-08 au
i 5.280477757252411 4.1607e-06 deg
node 204.735909974862 3.3469e-05 deg
peri 232.7243750969211 3.6814e-05 deg
M 235.7889326708807 1.4445e-05 deg
tp 2459442.186732693894
5.1788e-05 TDB
period 1280.137327445097
n .281219828749537 1.3195e-09 deg/d
Q 2.637333424737391 8.25e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1639  
   data-arc span      8566 days (23.45 yr)  
   first obs. used      1996-11-06  
   last obs. used      2020-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5177  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 05:13:02  

Additional Information
 Earth MOID = .997529 au 
 Jupiter MOID = 2.61256 au 
 T_jup = 3.568 
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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] (  
geometric albedo albedo 0.292   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

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 ]
FirstGov 2020-Jun-01 19:56 UT
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