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85748 (1998 SK138)
Classification: Main-belt Asteroid          SPK-ID: 2085748
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2175176063723439 4.5304e-08  
a 2.372767494900994 1.1551e-08 au
q 1.856648788932027 1.108e-07 au
i 2.67880692451934 4.7365e-06 deg
node 17.16284531184301 9.1994e-05 deg
peri 8.539510788609098 9.2625e-05 deg
M 329.4667869480768 1.4869e-05 deg
tp 2459113.727315440480
(2020-Sep-21.22731544)
5.5747e-05 TDB
period 1334.999807889701
3.66
9.7489e-06
2.669e-08
d
yr
n .2696629601535819 1.9692e-09 deg/d
Q 2.888886200869961 1.4064e-08 au
  Orbit Determination Parameters
   # obs. used (total)      512  
   data-arc span      7990 days (21.88 yr)  
   first obs. used      1998-09-18  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60163  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:57:17  

Additional Information
 Earth MOID = .860793 au 
 Jupiter MOID = 2.56611 au 
 T_jup = 3.510 
[ 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 16.2   n/a MPO474743  
diameter diameter 1.664 km 0.250 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.231   0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85748 (1998 SK138)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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