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

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1885541794827959 1.5179e-08  
a 2.273760254681823 5.1866e-09 au
q 1.845033255519699 3.4176e-08 au
i 5.768815535301102 7.6188e-07 deg
node 152.2611005236847 7.5578e-06 deg
peri 211.2142948916845 9.2308e-06 deg
M 153.066563533285 5.1347e-06 deg
tp 2458668.032304799877
(2019-Jul-03.53230480)
1.7366e-05 TDB
period 1252.320335984813
3.43
4.2849e-06
1.173e-08
d
yr
n .2874663851217422 9.8359e-10 deg/d
Q 2.702487253843947 6.1645e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2369  
   data-arc span      23175 days (63.45 yr)  
   first obs. used      1957-10-02  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47438  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 23:40:49  

Additional Information
 Earth MOID = .84333 au 
 Jupiter MOID = 2.75477 au 
 T_jup = 3.580 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.90   n/a E2021B10  
diameter diameter 3.523 km 0.136 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.552 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 0.392   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12999 Toruń           Discovered 1981 Aug. 30 by E. Bowell at Lowell Observatory's Anderson Mesa Station.
Toruń, 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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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