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JPL Small-Body Database Browser
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91855 (1999 UD11)
Classification: Main-belt Asteroid          SPK-ID: 2091855
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1304289055248051 8.0473e-08  
a 3.094046647118525 3.7162e-08 au
q 2.690493529292163 2.49e-07 au
i 20.67497134687722 9.2257e-06 deg
node 324.6650572510035 1.665e-05 deg
peri 20.21197742382542 3.0063e-05 deg
M 342.1138611621517 2.9318e-05 deg
tp 2459099.264941125507
(2020-Sep-06.76494113)
0.00016282 TDB
period 1987.873354194539
5.44
3.5814e-05
9.805e-08
d
yr
n .1810980559905274 3.2627e-09 deg/d
Q 3.497599764944887 4.2009e-08 au
  Orbit Determination Parameters
   # obs. used (total)      427  
   data-arc span      7228 days (19.79 yr)  
   first obs. used      1998-07-31  
   last obs. used      2018-05-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6013  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:32:36  

Additional Information
 Earth MOID = 1.68858 au 
 Jupiter MOID = 1.9034 au 
 T_jup = 3.112 
[ 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 14.3   n/a MPO432456  

91855 (1999 UD11)          Discovered 1999-Oct-31 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 UD11 = 2001 CN15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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