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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1845422839885348 7.3243e-08  
a 3.118216161718236 3.2339e-08 AU
q 2.54277342926479 2.3925e-07 AU
i .8766865040460936 6.5663e-06 deg
node 299.8764121537342 0.00045335 deg
peri 32.31407323008104 0.00045336 deg
M 314.0951052439584 2.2781e-05 deg
tp 2457256.956817971277
(2015-Aug-22.45681797)
0.00012897 JED
period 2011.211548579117
5.51
3.1288e-05
8.566e-08
d
yr
n .1789965855428452 2.7846e-09 deg/d
Q 3.693658894171681 3.8307e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      692  
   data-arc span      19997 days (54.75 yr)  
   first obs. used      1960-09-24  
   last obs. used      2015-06-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53649  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:10:02  

Additional Information
 Earth MOID = 1.53299 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 14.0 mag n/a MPO263462  
rotation period rot_per 10.2715 h n/a LCDB (Rev. 2015-July); 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., in press.]

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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