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JPL Small-Body Database Browser
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20391 (1998 KT55)
Classification: Main-belt Asteroid          SPK-ID: 2020391
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2373834390581032 3.7426e-08  
a 2.652983667218905 1.4149e-08 au
q 2.023209280529503 1.0037e-07 au
i 17.54595150672259 4.6075e-06 deg
node 91.26165990665828 1.843e-05 deg
peri 218.2982785584089 2.2881e-05 deg
M 262.898102559161 1.6583e-05 deg
tp 2459026.221424807614
(2020-Jun-25.72142481)
7.429e-05 TDB
period 1578.339012624516
4.32
1.2627e-05
3.457e-08
d
yr
n .2280878804366494 1.8247e-09 deg/d
Q 3.282758053908308 1.7508e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1694  
   data-arc span      17134 days (46.91 yr)  
   first obs. used      1972-06-13  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45822  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:52:04  

Additional Information
 Earth MOID = 1.03319 au 
 Jupiter MOID = 2.02529 au 
 T_jup = 3.284 
[ 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 12.8   n/a MPO474033  
diameter diameter 10.259 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.127   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20391 (1998 KT55)          Discovered 1998-May-23 by LINEAR at Socorro
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 KT55 = 1972 LZ = 1980 FU11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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