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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05470644003218612 4.9731e-08  
a 3.196657907430546 2.4406e-08 au
q 3.021780133314283 1.6082e-07 au
i 12.21475340088144 5.2382e-06 deg
node 50.41729708702391 2.2883e-05 deg
peri 121.1053355393774 5.2168e-05 deg
M 222.5968653116264 4.5473e-05 deg
tp 2459397.277039212805
(2021-Jul-01.77703921)
0.00026594 TDB
period 2087.577803571616
5.72
2.3907e-05
6.545e-08
d
yr
n .1724486624565943 1.9749e-09 deg/d
Q 3.371535681546809 2.5741e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1040  
   data-arc span      9755 days (26.71 yr)  
   first obs. used      1993-03-20  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5813  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:22:55  

Additional Information
 Earth MOID = 2.04495 au 
 Jupiter MOID = 1.64544 au 
 T_jup = 3.158 
[ 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-January); 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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