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49642 (1999 JK26)
Classification: Main-belt Asteroid          SPK-ID: 2049642
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05440680321908907 4.6549e-08  
a 3.197514395330848 2.3069e-08 au
q 3.023547858833878 1.534e-07 au
i 12.21227491328254 4.8931e-06 deg
node 50.41431934615801 2.0227e-05 deg
peri 120.8877132156894 5.0817e-05 deg
M 291.7565879680002 4.5264e-05 deg
tp 2459396.390810736759
(2021-Jun-30.89081074)
0.00026365 TDB
period 2088.416854045989
5.72
2.2601e-05
6.188e-08
d
yr
n .1723793788115409 1.8655e-09 deg/d
Q 3.371480931827817 2.4324e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1152  
   data-arc span      10079 days (27.59 yr)  
   first obs. used      1993-03-20  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56897  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:31:36  

Additional Information
 Earth MOID = 2.04646 au 
 Jupiter MOID = 1.64473 au 
 T_jup = 3.157 
[ 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 13.7   n/a MPO324754  
diameter diameter 6.144 km 0.249 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 220.047 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.186   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49642 (1999 JK26)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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