Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1882318692308558 4.6709e-08  
a 2.273481917551178 6.5268e-09 au
q 1.84554016654797 1.0332e-07 au
i 5.768195472180548 3.4783e-06 deg
node 152.2688902377255 3.8416e-05 deg
peri 211.1813682811986 3.949e-05 deg
M 340.6303960278465 9.9503e-06 deg
tp 2458667.868041813078
(2019-Jul-03.36804181)
3.4716e-05 TDB
period 1252.090393152824
3.43
5.3918e-06
1.476e-08
d
yr
n .2875191775040319 1.2381e-09 deg/d
Q 2.701423668554387 7.7554e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2016  
   data-arc span      22711 days (62.18 yr)  
   first obs. used      1957-10-02  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48363  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:30:18  

Additional Information
 Earth MOID = .844569 au 
 Jupiter MOID = 2.75127 au 
 T_jup = 3.581 
[ 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 13.8   n/a MPO302146  
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. 2019-January); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jan-17 14:20 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin