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JPL Small-Body Database Browser
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15989 (1998 XK39)
Classification: Main-belt Asteroid          SPK-ID: 2015989
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09981317707774584 2.7629e-08  
a 2.326516120000432 7.0733e-09 au
q 2.094299154540598 6.4572e-08 au
i 5.708215418067442 3.464e-06 deg
node 74.19567798539887 3.032e-05 deg
peri 108.1463702053354 3.4963e-05 deg
M 293.1795372980957 1.8292e-05 deg
tp 2459241.082760489442
(2021-Jan-26.58276049)		 6.6229e-05 TDB
period 1296.156750104797
3.55		 5.9111e-06
1.618e-08		 d
yr
n .2777441848533315 1.2666e-09 deg/d
Q 2.558733085460265 7.7793e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1988  
   data-arc span      22921 days (62.75 yr)  
   first obs. used      1957-04-28  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4726  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 21:32:20  

Additional Information
 Earth MOID = 1.10443 au 
 Jupiter MOID = 2.4104 au 
 T_jup = 3.561 
[ 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 14.0   n/a MPO502292  
diameter diameter 3.727 km 0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.609   0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

15989 (1998 XK39)          Discovered 1998-Dec-14 by LINEAR at Socorro
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 XK39 = 1989 HH 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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