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JPL Small-Body Database Browser
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20499 (1999 RZ2)
Classification: Main-belt Asteroid          SPK-ID: 2020499
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07763884298937469 3.9708e-08  
a 2.867282084193739 1.4194e-08 au
q 2.644669620652774 1.1625e-07 au
i .9720500861513085 4.2104e-06 deg
node 318.6163527576591 0.0002531 deg
peri 101.3643832819997 0.00025488 deg
M 324.9788795381046 2.8958e-05 deg
tp 2458773.016879692816
(2019-Oct-16.51687969)
0.00014271 TDB
period 1773.389196870157
4.86
1.3168e-05
3.605e-08
d
yr
n .2030011238567155 1.5074e-09 deg/d
Q 3.089894547734703 1.5296e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1442  
   data-arc span      15628 days (42.79 yr)  
   first obs. used      1977-02-19  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51853  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:44:29  

Additional Information
 Earth MOID = 1.65698 au 
 Jupiter MOID = 2.15336 au 
 T_jup = 3.295 
[ 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 14.3   n/a MPO452460  
diameter diameter 4.173 km 0.181 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.232   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20499 (1999 RZ2)          Discovered 1999-Sep-06 by Korlevic, K. at Visnjan
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RZ2 = 1977 DX5 = 1997 GK15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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