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JPL Small-Body Database Browser
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59993 (1999 SL20)
Classification: Main-belt Asteroid          SPK-ID: 2059993
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1461546432482915 5.0886e-08  
a 3.125954881162421 2.3606e-08 au
q 2.669082060695872 1.5769e-07 au
i 14.6448059689744 5.2137e-06 deg
node 83.40458948649699 1.8559e-05 deg
peri 300.8152620849766 2.5151e-05 deg
M 264.1357147639994 2.0958e-05 deg
tp 2459538.059848106853
(2021-Nov-19.55984811)
0.00012128 TDB
period 2018.703262033949
5.53
2.2867e-05
6.261e-08
d
yr
n .1783323021122387 2.0201e-09 deg/d
Q 3.58282770162897 2.7056e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1253  
   data-arc span      7234 days (19.81 yr)  
   first obs. used      1999-09-13  
   last obs. used      2019-07-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48772  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 12:58:42  

Additional Information
 Earth MOID = 1.70939 au 
 Jupiter MOID = 1.93389 au 
 T_jup = 3.148 
[ 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 13.5   n/a MPO474480  
diameter diameter 13.307 km 0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.052   0.000 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

59993 (1999 SL20)          Discovered 1999-Sep-30 by LINEAR at Socorro
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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