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91849 (1999 UK6)
Classification: Main-belt Asteroid          SPK-ID: 2091849
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08042151271899969 5.259e-08  
a 3.170321711857302 2.1465e-08 au
q 2.915359643983849 1.662e-07 au
i 7.06975214233691 5.6655e-06 deg
node 38.60929278985222 3.397e-05 deg
peri 337.4540601158957 4.4103e-05 deg
M 256.3981168480744 3.0484e-05 deg
tp 2459593.860426424045
(2022-Jan-14.36042642)
0.00017713 TDB
period 2061.832729424532
5.64
2.094e-05
5.733e-08
d
yr
n .1746019426612157 1.7733e-09 deg/d
Q 3.425283779730755 2.3192e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1647  
   data-arc span      7215 days (19.75 yr)  
   first obs. used      1999-10-01  
   last obs. used      2019-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49547  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:38:17  

Additional Information
 Earth MOID = 1.91868 au 
 Jupiter MOID = 2.03327 au 
 T_jup = 3.186 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1   n/a MPO348077  
diameter diameter 13.759 km 0.111 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.258 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 0.052   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91849 (1999 UK6)          Discovered 1999-Oct-28 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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