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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2371762316859522 3.5833e-08  
a 2.653264481802635 1.0841e-08 au
q 2.023973210342505 9.5501e-08 au
i 17.54380368929426 3.8225e-06 deg
node 91.25617428508241 1.642e-05 deg
peri 218.1129651452084 1.8935e-05 deg
M 39.86143750521488 9.6828e-06 deg
tp 2459025.708746243454
(2020-Jun-25.20874624)
4.2444e-05 TDB
period 1578.589616697199
4.32
9.675e-06
2.649e-08
d
yr
n .2280516710563505 1.3977e-09 deg/d
Q 3.282555753262764 1.3412e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2258  
   data-arc span      17775 days (48.67 yr)  
   first obs. used      1972-06-13  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43215  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:19:18  

Additional Information
 Earth MOID = 1.03247 au 
 Jupiter MOID = 2.02568 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 12.84   n/a E2021B10  
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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