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9955 (1991 PU11)
Classification: Main-belt Asteroid          SPK-ID: 2009955
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1794315303325696 6.0106e-08  
a 2.273430194981026 1.1926e-08 AU
q 1.865505135991309 1.3889e-07 AU
i 4.988378235873139 5.951e-06 deg
node 343.0944200935194 6.3589e-05 deg
peri 24.30103431073 6.526e-05 deg
M 265.9704587515739 1.6812e-05 deg
tp 2457327.526298807929
(2015-Nov-01.02629881)
5.918e-05 JED
period 1252.047665103598
3.43
9.852e-06
2.697e-08
d
yr
n .2875289895374811 2.2625e-09 deg/d
Q 2.681355253970744 1.4066e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1063  
   data-arc span      17510 days (47.94 yr)  
   first obs. used      1967-09-11  
   last obs. used      2015-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5134  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:29:22  

Additional Information
 Earth MOID = .865293 AU 
 T_jup = 3.584 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9 mag n/a MPO263438  

9955 (1991 PU11)          Discovered 1991-Aug-07 by Holt, H. E. at Palomar
Reference: 19990202/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 PU11 = 1967 RG1 = 1974 SE3 = 1998 SP121 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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