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12609 Apollodoros (2155 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2012609
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1845536958785453 7.2608e-08  
a 3.118420498332316 2.569e-08 au
q 2.542904470061672 2.35e-07 au
i .8764683856842879 6.2812e-06 deg
node 299.8673774919048 0.00039766 deg
peri 32.24868913951307 0.00039774 deg
M 25.7410544407651 1.3364e-05 deg
tp 2457256.678347648574
(2015-Aug-22.17834765)
7.4866e-05 JED
period 2011.409243768898
5.51
2.4855e-05
6.805e-08
d
yr
n .1789789925224001 2.2117e-09 deg/d
Q 3.693936526602959 3.0431e-08 au
  Orbit Determination Parameters
   # obs. used (total)      827  
   data-arc span      20164 days (55.21 yr)  
   first obs. used      1960-09-24  
   last obs. used      2015-12-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53088  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:21:23  

Additional Information
 Earth MOID = 1.53049 au 
 Jupiter MOID = 1.66539 au 
 T_jup = 3.190 
[ 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 14.1 mag n/a MPO347624  
rotation period rot_per 10.2715 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

12609 Apollodoros           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Apollodoros of Athens (c. 180 B.C.-c. 110 B.C.), a universal scholar and stoic, was author of a much used Chronika.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080819/MPCPages.arcLast Updated: 2008-08-25

[ show close-approach data ]
Alternate Designations
 2155 P-L = 1997 GY11 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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