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120839 (1998 KX38)
Classification: Main-belt Asteroid          SPK-ID: 2120839
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1889404071737013 5.2553e-08  
a 2.668423175378933 1.7397e-08 au
q 2.164250214111096 1.4697e-07 au
i 14.02126722249628 4.8148e-06 deg
node 51.03512415953823 2.0965e-05 deg
peri 130.1557768373361 2.4791e-05 deg
M 111.8714121222064 1.4266e-05 deg
tp 2458705.737127833521
(2019-Aug-10.23712783)
6.11e-05 TDB
period 1592.137174288664
4.36
1.557e-05
4.263e-08
d
yr
n .226111170452911 2.2113e-09 deg/d
Q 3.172596136646769 2.0684e-08 au
  Orbit Determination Parameters
   # obs. used (total)      741  
   data-arc span      8072 days (22.10 yr)  
   first obs. used      1998-05-22  
   last obs. used      2020-06-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52568  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:54:21  

Additional Information
 Earth MOID = 1.19125 au 
 Jupiter MOID = 1.86396 au 
 T_jup = 3.315 
[ 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 15.14   n/a E2021B55  
diameter diameter 2.662 km 1.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.300   0.225 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120839 (1998 KX38)          Discovered 1998-May-22 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 KX38 = 2000 WP139 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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