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20558 (1999 RN117)
Classification: Main-belt Asteroid          SPK-ID: 2020558
[ 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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1661388237418815 4.3867e-08  
a 2.779059912732618 1.4698e-08 au
q 2.317350167723005 1.2e-07 au
i 7.741530920997938 3.4503e-06 deg
node 250.7346305671904 3.2834e-05 deg
peri 92.51700589694306 3.4327e-05 deg
M 203.1279457125189 1.1763e-05 deg
tp 2459937.874940984364
(2022-Dec-24.37494098)		 5.8352e-05 TDB
period 1692.175065597743
4.63		 1.3424e-05
3.675e-08		 d
yr
n .2127439455401938 1.6877e-09 deg/d
Q 3.240769657742231 1.7139e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1752  
   data-arc span      11137 days (30.49 yr)  
   first obs. used      1990-09-17  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45413  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:23:50  

Additional Information
 Earth MOID = 1.3239 au 
 Jupiter MOID = 2.2324 au 
 T_jup = 3.301 
[ 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 13.66   n/a E2021B10  
diameter diameter 5.186 km 0.234 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.314   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20558 (1999 RN117)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RN117 = 1990 SA12 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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