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12168 Polko (5141 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2012168
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1003297679605317 7.6496e-08  
a 3.011827927450907 2.6032e-08 au
q 2.709651930352709 2.271e-07 au
i 9.5184944646531 6.5803e-06 deg
node 301.0382288496036 3.7559e-05 deg
peri 19.12706826890299 5.0063e-05 deg
M 107.0725806786934 3.6176e-05 deg
tp 2457032.668566225188
(2015-Jan-10.16856623)
0.00019081 JED
period 1909.165865464285
5.23
2.4752e-05
6.777e-08
d
yr
n .1885640250080904 2.4447e-09 deg/d
Q 3.314003924549106 2.8643e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1087  
   data-arc span      22254 days (60.93 yr)  
   first obs. used      1955-03-24  
   last obs. used      2016-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52576  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 16:12:43  

Additional Information
 Earth MOID = 1.69773 au 
 Jupiter MOID = 1.95384 au 
 T_jup = 3.221 
[ 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 12.7 mag n/a PDS3 (MPC 36320)  
rotation period rot_per 9.4071 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Molnar, L.A.; Haegert, M.J. (2007) Minor Planet Bul. 34, 126-128.]

12168 Polko           Discovered 1973 Sept. 25 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Norbert Polko (b. 1944) has scanned more than 200~000 glass plates---a world record---from the largest European astronomical plate archive, at the Sonneberg Observatory. The name was suggested by R. Hudec.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20081113/MPCPages.arcLast Updated: 2008-11-17

[ show close-approach data ]
Alternate Designations
 5141 T-2 = 1978 QK3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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