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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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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1299048693402036 7.9157e-08  
a 3.092441726593896 2.2396e-08 au
q 2.690718488158522 2.4504e-07 au
i 20.67782088949951 7.8454e-06 deg
node 324.6668772222631 1.2216e-05 deg
peri 20.29780082951162 2.4295e-05 deg
M 53.80619488575545 1.7131e-05 deg
tp 2459099.620306255342
(2020-Sep-07.12030626)
9.5563e-05 TDB
period 1986.326852790911
5.44
2.1578e-05
5.908e-08
d
yr
n .1812390541336024 1.9689e-09 deg/d
Q 3.49416496502927 2.5306e-08 au
  Orbit Determination Parameters
   # obs. used (total)      821  
   data-arc span      8399 days (23.00 yr)  
   first obs. used      1998-07-31  
   last obs. used      2021-07-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49889  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 22:04:53  

Additional Information
 Earth MOID = 1.68809 au 
 Jupiter MOID = 1.90706 au 
 T_jup = 3.113 
[ 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 14.44   n/a E2021B10  

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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