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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1347363553339059 7.9747e-08  
a 3.088131318883959 3.7922e-08 AU
q 2.672047760185047 2.6046e-07 AU
i 11.65025731321718 8.4995e-06 deg
node 291.1904938370476 4.8352e-05 deg
peri 148.3115041982391 6.2774e-05 deg
M 345.0023641795722 4.0907e-05 deg
tp 2456883.077621486370
(2014-Aug-13.57762149)
0.00022577 JED
period 1982.17533023449
5.43
3.6511e-05
9.996e-08
d
yr
n .18161864619585 3.3454e-09 deg/d
Q 3.504214877582872 4.3031e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      749  
   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      .49584  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 18:54:48  

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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