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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .17951206699315 7.1367e-08  
a 2.273140429074445 1.4209e-08 AU
q 1.865084292085595 1.6147e-07 AU
i 4.988539720519902 6.593e-06 deg
node 343.0983689979136 7.3363e-05 deg
peri 24.3337472996898 7.5369e-05 deg
M 208.4203697984628 2.3569e-05 deg
tp 2457327.579552604218
(2015-Nov-01.07955260)
8.4713e-05 JED
period 1251.808298286733
3.43
1.1738e-05
3.214e-08
d
yr
n .2875839699199215 2.6965e-09 deg/d
Q 2.681196566063294 1.676e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      966  
   data-arc span      17011 days (46.57 yr)  
   first obs. used      1967-09-11  
   last obs. used      2014-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54534  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:57:40  

Additional Information
 Earth MOID = .863435 AU 
 T_jup = 3.585 
[ 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 (675)
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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