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

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1847336435197503 5.51e-08  
a 3.120741068056136 2.0795e-08 au
q 2.544235200072409 1.7839e-07 au
i .8767791517162954 4.7306e-06 deg
node 299.8144737265536 0.00033168 deg
peri 31.42557665271007 0.00033182 deg
M 348.8856203993827 1.0923e-05 deg
tp 2459262.668123110095
(2021-Feb-17.16812311)
6.1339e-05 TDB
period 2013.654843891724
5.51
2.0127e-05
5.51e-08
d
yr
n .1787793976172401 1.7869e-09 deg/d
Q 3.697246936039864 2.4636e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1126  
   data-arc span      21836 days (59.78 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53469  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 23:27:36  

Additional Information
 Earth MOID = 1.53171 au 
 Jupiter MOID = 1.67063 au 
 T_jup = 3.189 
[ show covariance matrix ]

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 14.13   n/a E2021B10  
diameter diameter 8.904 km 0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.272 h n/a LCDB (Rev. 2020-October); 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.]
geometric albedo albedo 0.060   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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