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JPL Small-Body Database Browser
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20498 (1999 RT1)
Classification: Main-belt Asteroid          SPK-ID: 2020498
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1786263466152414 7.7806e-08  
a 2.59670857574201 1.3573e-08 au
q 2.132868009632748 1.9638e-07 au
i 15.08412326252898 5.8132e-06 deg
node 351.2630372280315 1.6643e-05 deg
peri 11.36042006732589 2.0526e-05 deg
M 243.8211127969619 1.5488e-05 deg
tp 2459093.739622606896
(2020-Sep-01.23962261)
6.8137e-05 TDB
period 1528.386683788439
4.18
1.1983e-05
3.281e-08
d
yr
n .2355424866092537 1.8468e-09 deg/d
Q 3.060549141851272 1.5997e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1286  
   data-arc span      8598 days (23.54 yr)  
   first obs. used      1995-10-23  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45589  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:52:56  

Additional Information
 Earth MOID = 1.13036 au 
 Jupiter MOID = 2.39309 au 
 T_jup = 3.346 
[ 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 13.4   n/a MPO449102  
diameter diameter 5.176 km 0.185 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.346   0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20498 (1999 RT1)          Discovered 1999-Sep-05 by Korlevic, K. at Visnjan
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RT1 = 1995 UN49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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