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7181 (1991 PH12)
Classification: Main-belt Asteroid          SPK-ID: 2007181
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1347363860420689 8.0659e-08  
a 3.088131323735333 3.6456e-08 AU
q 2.672047669551924 2.605e-07 AU
i 11.65025141125794 8.6291e-06 deg
node 291.1905171144357 5.141e-05 deg
peri 148.3114723549654 6.6508e-05 deg
M 345.002376985947 4.234e-05 deg
tp 2456883.077551168516
(2014-Aug-13.57755117)
0.00023357 JED
period 1982.175334905409
5.43
3.51e-05
9.61e-08
d
yr
n .1816186457678728 3.2161e-09 deg/d
Q 3.504214977918743 4.1368e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      747  
   data-arc span      22044 days (60.35 yr)  
   first obs. used      1953-09-16  
   last obs. used      2014-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52141  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Feb-19 18:06:17  

Additional Information
 Earth MOID = 1.6951 AU 
 T_jup = 3.180 
[ 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 12.3 mag n/a MPO279590  

7181 (1991 PH12)          Discovered 1991-Aug-07 by Holt, H. E. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 PH12 = 1986 RN4 = 1986 TU2 = 1986 VK9 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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