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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1003066279264473 7.7232e-08  
a 3.012399481989916 2.6526e-08 au
q 2.710235847984131 2.3005e-07 au
i 9.51800331067874 6.8455e-06 deg
node 301.0438072643436 3.7761e-05 deg
peri 19.23118935568271 5.0245e-05 deg
M 69.2561443042086 3.6274e-05 deg
tp 2457033.113594546275
(2015-Jan-10.61359455)
0.0001917 JED
period 1909.709344811213
5.23
2.5224e-05
6.906e-08
d
yr
n .18851036204967 2.4899e-09 deg/d
Q 3.314563115995701 2.9186e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1050  
   data-arc span      22175 days (60.71 yr)  
   first obs. used      1955-03-24  
   last obs. used      2015-12-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52365  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:19:53  

Additional Information
 Earth MOID = 1.69692 au 
 Jupiter MOID = 1.95243 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. 2015-December); 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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