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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1352514353527848 6.4746e-08  
a 3.089956542267847 2.7147e-08 AU
q 2.672035484748394 2.007e-07 AU
i 11.64900303190526 8.3418e-06 deg
node 291.1926478030292 3.2668e-05 deg
peri 148.3284140317919 4.977e-05 deg
M 21.29154713373321 3.3231e-05 deg
tp 2456883.163885287057
(2014-Aug-13.66388529)
0.00018328 JED
period 1983.932920954109
5.43
2.6145e-05
7.158e-08
d
yr
n .1814577479902241 2.3913e-09 deg/d
Q 3.507877599787301 3.0819e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1036  
   data-arc span      22505 days (61.62 yr)  
   first obs. used      1953-09-16  
   last obs. used      2015-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45759  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:57:27  

Additional Information
 Earth MOID = 1.69547 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 12.4 mag n/a MPO337315  

7181 (1991 PH12)          Discovered 1991-Aug-07 by Holt, H. E. at Palomar
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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