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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09970243926343962 1.675e-08  
a 2.326361832104759 6.5336e-09 au
q 2.09441788283455 3.93e-08 au
i 5.70800000821903 2.6229e-07 deg
node 74.19180335846013 9.6115e-06 deg
peri 108.1349763812339 1.3499e-05 deg
M 348.7357930691093 9.4363e-06 deg
tp 2459241.052015302969
(2021-Jan-26.55201530)		 3.4055e-05 TDB
period 1296.027816129141
3.55		 5.4598e-06
1.495e-08		 d
yr
n .2777718159439012 1.1702e-09 deg/d
Q 2.558305781374968 7.185e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2292  
   data-arc span      23332 days (63.88 yr)  
   first obs. used      1957-04-28  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47498  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:15:23  

Additional Information
 Earth MOID = 1.10399 au 
 Jupiter MOID = 2.40977 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 14.01   n/a E2021B10  
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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