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12227 Penney (1985 TO3)
Classification: Main-belt Asteroid          SPK-ID: 2012227
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1899587446762795 3.233e-08  
a 2.273182621349048 6.2394e-09 au
q 1.841371704177649 7.4903e-08 au
i 5.64505175865691 3.8034e-06 deg
node 275.729882795061 3.6503e-05 deg
peri 82.98116720685712 3.8179e-05 deg
M 297.8644091774812 9.8977e-06 deg
tp 2458816.566705028868
(2019-Nov-29.06670503)
3.4496e-05 TDB
period 1251.843151094691
3.43
5.1541e-06
1.411e-08
d
yr
n .2875759632388395 1.184e-09 deg/d
Q 2.704993538520448 7.4246e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1374  
   data-arc span      12501 days (34.23 yr)  
   first obs. used      1985-09-15  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48653  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:23:17  

Additional Information
 Earth MOID = .847057 au 
 Jupiter MOID = 2.7712 au 
 T_jup = 3.581 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO502262  
diameter diameter 2.120 km 0.454 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.623   0.238 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12227 Penney           Discovered 1985 Oct. 11 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Big John Penney is representative of the team of workers who find a deep and abiding love for the challenges and rigors of wintering at South Pole Station. He has a unique capability for keeping machines operating under the worst and coldest of conditions by treating them like friends.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020128/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1985 TO3 = 1998 KC28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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