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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1445701663331925 4.7709e-08  
a 3.205232491923015 2.7584e-08 au
q 2.741851497429151 1.5104e-07 au
i .4065253961324402 5.0222e-06 deg
node 239.0789203528066 0.00074873 deg
peri 76.9663155123358 0.00074906 deg
M 104.258306351094 1.8428e-05 deg
tp 2456793.489928906609
(2014-May-15.98992891)
0.00010712 JED
period 2095.982883682511
5.74
2.7057e-05
7.408e-08
d
yr
n .1717571277908064 2.2172e-09 deg/d
Q 3.668613486416878 3.1572e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1255  
   data-arc span      13330 days (36.50 yr)  
   first obs. used      1979-06-22  
   last obs. used      2015-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49268  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:05:39  

Additional Information
 Earth MOID = 1.72633 au 
 Jupiter MOID = 1.60814 au 
 T_jup = 3.177 
[ 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 13.2 mag n/a MPO347589  

7944 (1991 PR12)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar
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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