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JPL Small-Body Database Browser
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20605 (1999 RX209)
Classification: Main-belt Asteroid          SPK-ID: 2020605
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .18150183327562 3.9574e-08  
a 2.559303525076858 1.093e-08 au
q 2.094785243366652 1.0365e-07 au
i 12.90862557269446 6.6695e-06 deg
node 338.8876612378356 1.2408e-05 deg
peri 295.3702717663098 2.3672e-05 deg
M .3899186617113951 1.7552e-05 deg
tp 2458598.880232653426
(2019-Apr-25.38023265)
7.2914e-05 TDB
period 1495.481755624126
4.09
9.5802e-06
2.623e-08
d
yr
n .2407251032291981 1.5421e-09 deg/d
Q 3.023821806787065 1.2914e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1582  
   data-arc span      15631 days (42.80 yr)  
   first obs. used      1977-02-18  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49499  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:45:07  

Additional Information
 Earth MOID = 1.11501 au 
 Jupiter MOID = 2.27579 au 
 T_jup = 3.378 
[ 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 14.1   n/a MPO347683  
diameter diameter 4.231 km 0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.298   0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20605 (1999 RX209)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 RX209 = 1977 DN3 = 1998 FX110 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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