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175856 (1999 UQ56)
Classification: Main-belt Asteroid          SPK-ID: 2175856
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1321875001034907 8.2608e-08  
a 2.320415332535608 9.6483e-09 au
q 2.013685430525916 1.9661e-07 au
i 6.371508020504592 6.5809e-06 deg
node 323.2591896630335 3.4783e-05 deg
peri 49.66481308913851 3.8777e-05 deg
M 4.512086272560626 1.6879e-05 deg
tp 2459184.318383260310
(2020-Nov-30.81838326)
6.0495e-05 TDB
period 1291.061756002867
3.53
8.0524e-06
2.205e-08
d
yr
n .2788402633151815 1.7391e-09 deg/d
Q 2.6271452345453 1.0924e-08 au
  Orbit Determination Parameters
   # obs. used (total)      705  
   data-arc span      7783 days (21.31 yr)  
   first obs. used      1999-09-18  
   last obs. used      2021-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4714  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 11:33:55  

Additional Information
 Earth MOID = 1.01832 au 
 Jupiter MOID = 2.85713 au 
 T_jup = 3.558 
[ 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 16.25   n/a E2021B55  
rotation period rot_per 4.960 h n/a LCDB (Rev. 2020-October); 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.]

175856 (1999 UQ56)          Discovered 1999-Oct-28 by CSS at Catalina
Reference: 20080221/Numbers.arcLast Updated: 2008-02-22

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