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20508 (1999 RL25)
Classification: Main-belt Asteroid          SPK-ID: 2020508
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09608308208568575 9.677e-09  
a 2.475644227191823 9.4873e-09 au
q 2.237776699695597 2.2537e-08 au
i 16.30265650103468 7.1421e-07 deg
node 353.9291299878153 3.8766e-06 deg
peri 14.47314935565179 1.3707e-05 deg
M 158.4860341992287 1.1803e-05 deg
tp 2458574.146839194891
(2019-Mar-31.64683919)
4.5487e-05 TDB
period 1422.757147209484
3.90
8.1786e-06
2.239e-08
d
yr
n .2530298306398136 1.4545e-09 deg/d
Q 2.713511754688049 1.0399e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1628  
   data-arc span      15706 days (43.00 yr)  
   first obs. used      1978-03-15  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47653  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:22:45  

Additional Information
 Earth MOID = 1.23609 au 
 Jupiter MOID = 2.72245 au 
 T_jup = 3.420 
[ 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 13.87   n/a E2021B10  
diameter diameter 5.689 km 0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.198   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20508 (1999 RL25)          Discovered 1999-Sep-07 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 RL25 = 1978 EJ10 = 1991 RS30 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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