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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1792469343730873 5.7275e-08  
a 2.273249979895566 1.0385e-08 au
q 1.865776889935603 1.3365e-07 au
i 4.988387637608338 5.7905e-06 deg
node 343.0907712644633 5.0838e-05 deg
peri 24.23647543995945 5.2741e-05 deg
M 78.54195025119182 1.262e-05 deg
tp 2457327.370631313351
(2015-Oct-31.87063131)
4.3934e-05 JED
period 1251.89879310008
3.43
8.5787e-06
2.349e-08
d
yr
n .2875631816119344 1.9705e-09 deg/d
Q 2.680723069855528 1.2247e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1282  
   data-arc span      17684 days (48.42 yr)  
   first obs. used      1967-09-11  
   last obs. used      2016-02-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50275  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 16:05:14  

Additional Information
 Earth MOID = .864332 au 
 Jupiter MOID = 2.77669 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 14.0 mag n/a MPO347605  

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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