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12999 Torun (1981 QJ2)
Classification: Main-belt Asteroid          SPK-ID: 2012999
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1895415568898819 8.4791e-08  
a 2.273044102119754 1.3025e-08 AU
q 1.842207784124613 1.8805e-07 AU
i 5.771172436107784 6.9793e-06 deg
node 152.3452815234902 4.9231e-05 deg
peri 210.9690284421233 5.0825e-05 deg
M 240.8309660184884 1.3346e-05 deg
tp 2457414.853620636370
(2016-Jan-27.35362064)
4.8335e-05 JED
period 1251.728728893075
3.43
1.0759e-05
2.946e-08
d
yr
n .2876022509432648 2.472e-09 deg/d
Q 2.703880420114896 1.5494e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1167  
   data-arc span      21081 days (57.72 yr)  
   first obs. used      1957-10-02  
   last obs. used      2015-06-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5023  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:11:01  

Additional Information
 Earth MOID = .842175 AU 
 T_jup = 3.580 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO302146  
rotation period rot_per 3.5521 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.]

12999 Toru\'n           Discovered 1981 Aug. 30 by E. Bowell at Lowell Observatory's Anderson Mesa Station.
Toru\'n, Poland, is the birthplace of Nicolas Copernicus. In 1997, the gothic Old Town became a UNESCO World Heritage Site. The university, which bears Copernicus' name, houses the largest observatory in Poland. The name was suggested by T. Michałowski.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080321/MPCPages.arcLast Updated: 2008-03-26

Alternate Designations
 1981 QJ2 = 1957 TF = 1998 QL8 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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