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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 ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1446866175761287 5.5396e-08  
a 3.206547839224526 3.1189e-08 AU
q 2.742603278271085 1.8238e-07 AU
i .406245263681377 5.3697e-06 deg
node 239.0885852081725 0.00090832 deg
peri 77.10540657555603 0.00090867 deg
M 35.42203790560455 2.0678e-05 deg
tp 2456794.139745396041
(2014-May-16.63974540)
0.00012079 JED
period 2097.273224521926
5.74
3.0599e-05
8.378e-08
d
yr
n .171651454751234 2.5044e-09 deg/d
Q 3.670492400177968 3.5701e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1061  
   data-arc span      12884 days (35.27 yr)  
   first obs. used      1979-06-22  
   last obs. used      2014-09-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47472  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:11:23  

Additional Information
 Earth MOID = 1.72996 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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