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7944 (1991 PR12)
Classification: Outer Main-belt Asteroid          SPK-ID: 2007944
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1448059521334512 6.0048e-08  
a 3.207118121448223 4.0798e-08 AU
q 2.742708328267468 2.0422e-07 AU
i .4061941178241913 6.7289e-06 deg
node 239.1057429627998 0.00093125 deg
peri 77.13573316453123 0.0009317 deg
M 1.055775716628744 2.9191e-05 deg
tp 2456794.347664244337
(2014-May-16.84766424)
0.00017006 JED
period 2097.832747196396
5.74
4.003e-05
1.096e-07
d
yr
n .1716056727978502 3.2745e-09 deg/d
Q 3.671527914628979 4.6706e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      966  
   data-arc span      12411 days (33.98 yr)  
   first obs. used      1979-06-22  
   last obs. used      2013-06-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49834  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 15:50:23  

Additional Information
 Earth MOID = 1.72816 AU 
 T_jup = 3.176 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1 mag n/a MPO263420  

7944 (1991 PR12)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 PR12 = 1979 MS = 1980 TU8 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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