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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 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1449449125459478 6.5775e-08  
a 3.207059057396608 4.569e-08 AU
q 2.742212162792567 2.1522e-07 AU
i .4061845454779295 6.7534e-06 deg
node 239.1137574557123 0.0010338 deg
peri 77.2175793546687 0.0010342 deg
M 292.3514454541311 3.241e-05 deg
tp 2456794.698424050162
(2014-May-17.19842405)		 0.0001933 JED
period 2097.774795200327
5.74		 4.483e-05
1.227e-07		 d
yr
n .1716104134836941 3.6674e-09 deg/d
Q 3.67190595200065 5.2313e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      932  
   data-arc span      12358 days (33.83 yr)  
   first obs. used      1979-06-22  
   last obs. used      2013-04-22  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .50482  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 13:28:53  

Additional Information
 Earth MOID = 1.72857 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 13.3 mag n/a PDS3 (MPC 30746)  

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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