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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09970243940281875 1.6732e-08  
a 2.326361832038978 6.3404e-09 au
q 2.094417882451081 3.9296e-08 au
i 5.708000005857078 2.619e-07 deg
node 74.19180365930634 9.5871e-06 deg
peri 108.1349759718366 1.3311e-05 deg
M 348.7357932238261 9.1056e-06 deg
tp 2459241.052014744257
(2021-Jan-26.55201474)
3.2856e-05 TDB
period 1296.02781607417
3.55
5.2984e-06
1.451e-08
d
yr
n .2777718159556828 1.1356e-09 deg/d
Q 2.558305781626874 6.9726e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2309  
   data-arc span      23340 days (63.90 yr)  
   first obs. used      1957-04-28  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47354  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:10:38  

Additional Information
 Earth MOID = 1.10399 au 
 Jupiter MOID = 2.40977 au 
 T_jup = 3.561 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456999.5 (2014-Dec-08.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09962530041524323 1.678e-08  
q 2.094732911850307 3.9424e-08 au
tp 2456649.928981527320
(2013-Dec-23.42898153)
2.954e-05 TDB
node 74.21932659834106 9.5906e-06 deg
peri 108.3950508813976 1.3302e-05 deg
i 5.707194196298632 2.6199e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2309  
   data-arc span      23340 days (63.90 yr)  
   first obs. used      1957-04-28  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47354  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:10:38  

Additional Information
 Jupiter MOID = 2.40977 au 
 T_jup = 3.561 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.815559692252194E-16 -6.546103946764964E-16 2.259761418541035E-13 2.074286659022588E-14 2.925204307314704E-14 3.307035646337492E-16
q -6.546103946764964E-16 1.55424925291966E-15 -5.018868696647035E-13 -4.836733518137409E-14 -5.916914772301602E-14 -7.463837759515331E-16
tp 2.259761418541035E-13 -5.018868696647035E-13 8.726211228797434E-10 -7.764282732619531E-11 2.8297408011024E-10 2.455322433166269E-12
node 2.074286659022588E-14 -4.836733518137409E-14 -7.764282732619531E-11 9.198000079693249E-11 -1.099722515785512E-10 -1.428046636738238E-12
peri 2.925204307314704E-14 -5.916914772301602E-14 2.8297408011024E-10 -1.099722515785512E-10 1.769303448294169E-10 2.03991697409945E-12
i 3.307035646337492E-16 -7.463837759515331E-16 2.455322433166269E-12 -1.428046636738238E-12 2.03991697409945E-12 6.864037789850401E-14

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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

Alternate Designations
 1998 XK39 = 1989 HH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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