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JPL Small-Body Database Browser
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20530 Johnayres (1999 RG55)
Classification: Main-belt Asteroid          SPK-ID: 2020530
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .177559133788326 4.4822e-08  
a 3.14303664245001 2.4354e-08 au
q 2.584961778751617 1.4652e-07 au
i 1.037818538213526 5.0382e-06 deg
node 177.4338302556566 0.00024526 deg
peri 165.5855227721234 0.00024558 deg
M 178.9094807694494 1.4924e-05 deg
tp 2457589.028971817719
(2016-Jul-19.52897182)
7.8963e-05 TDB
period 2035.272633845797
5.57
2.3656e-05
6.477e-08
d
yr
n .1768804798007595 2.0559e-09 deg/d
Q 3.701111506148402 2.8679e-08 au
  Orbit Determination Parameters
   # obs. used (total)      901  
   data-arc span      8921 days (24.42 yr)  
   first obs. used      1994-10-27  
   last obs. used      2019-03-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54045  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:42:20  

Additional Information
 Earth MOID = 1.57621 au 
 Jupiter MOID = 1.70745 au 
 T_jup = 3.185 
[ 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 14.2   n/a MPO439236  

20530 Johnayres           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
John Ayres mentored a finalist in the 2004 Discovery Channel Youth Science Challenge (DCYSC), a middle school science competition. He teaches at the Howard Bishop Middle School, Gainesville, Florida.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041028/MPCPages.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RG55 = 1995 YF23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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