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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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1795120555759978 6.7937e-08  
a 2.273140420604096 1.4511e-08 AU
q 1.865084311088566 1.5342e-07 AU
i 4.98853818007481 6.0155e-06 deg
node 343.0982435258827 6.8977e-05 deg
peri 24.33384903716989 7.1047e-05 deg
M 208.4203931650852 2.2881e-05 deg
tp 2457327.579468406675
(2015-Nov-01.07946841)
8.2338e-05 JED
period 1251.808291289858
3.43
1.1986e-05
3.282e-08
d
yr
n .2875839715273474 2.7537e-09 deg/d
Q 2.681196530119625 1.7115e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      997  
   data-arc span      17089 days (46.79 yr)  
   first obs. used      1967-09-11  
   last obs. used      2014-06-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52211  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:23:00  

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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