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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1845339915013037 7.2456e-08  
a 3.117971331175574 2.5699e-08 au
q 2.542599636047112 2.3449e-07 au
i .8764851798957868 6.2606e-06 deg
node 299.8522156460162 0.0003977 deg
peri 32.21372330348046 0.00039778 deg
M 61.58250747409036 1.3312e-05 deg
tp 2457256.497601343820
(2015-Aug-21.99760134)
7.4788e-05 JED
period 2010.974684139458
5.51
2.4863e-05
6.807e-08
d
yr
n .1790176688146884 2.2133e-09 deg/d
Q 3.693343026304037 3.0442e-08 au
  Orbit Determination Parameters
   # obs. used (total)      835  
   data-arc span      20199 days (55.30 yr)  
   first obs. used      1960-09-24  
   last obs. used      2016-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54106  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:50:51  

Additional Information
 Earth MOID = 1.53146 au 
 Jupiter MOID = 1.66664 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. 2016-February); 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. (2016) 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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