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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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1794315230232629 6.5958e-08  
a 2.273430192980586 1.4025e-08 AU
q 1.865505150967009 1.4964e-07 AU
i 4.988378735303538 5.9907e-06 deg
node 343.0944474910285 6.8382e-05 deg
peri 24.30100469446466 7.0397e-05 deg
M 265.9704626693614 2.2057e-05 deg
tp 2457327.526284750580
(2015-Nov-01.02628475)
7.8288e-05 JED
period 1252.047663451043
3.43
1.1586e-05
3.172e-08
d
yr
n .2875289899169854 2.6607e-09 deg/d
Q 2.681355234994164 1.6542e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1034  
   data-arc span      17458 days (47.80 yr)  
   first obs. used      1967-09-11  
   last obs. used      2015-06-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51443  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:03:27  

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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