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11780 Thunder Bay (1942 TB)
Classification: Main-belt Asteroid          SPK-ID: 2011780
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2712843294403017 1.0905e-08  
a 2.547896866047867 5.9733e-09 au
q 1.856692373259025 2.8001e-08 au
i 9.354300130949134 5.7743e-07 deg
node 150.5807931336664 4.1213e-06 deg
peri 222.2306121888367 5.4378e-06 deg
M 136.9462628326951 2.6437e-06 deg
tp 2458831.408365438474
(2019-Dec-13.90836544)		 9.7883e-06 TDB
period 1485.494998068549
4.07		 5.2239e-06
1.43e-08		 d
yr
n .2423434615855823 8.5223e-10 deg/d
Q 3.239101358836709 7.5938e-09 au
   Orbit Determination Parameters
   # obs. used (total)      3122  
   data-arc span      28740 days (78.69 yr)  
   first obs. used      1942-10-03  
   last obs. used      2021-06-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44059  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 02:48:06  

Additional Information
 Earth MOID = .867003 au 
 Jupiter MOID = 2.2517 au 
 T_jup = 3.371 
[ 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 13.16   n/a MPCxxxxx  
diameter diameter 5.591 km 0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 295. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Oey, J. (2008) Minor Planet Bull. 35, 132-135.]
geometric albedo albedo 0.287   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11780 Thunder Bay           Discovered 1942 Oct. 3 by L. Oterma at Turku.
Thunder Bay, located on the shores of Lake Superior, is the most populous municipality in Northwestern Ontario, Canada. Formed in 1970 as the amalgamation of two cities, Thunder Bay is known as "the Lakehead" because it is Canada's westernmost port on the Great Lakes and the end of Great Lakes Navigation.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2017-01-12Last Updated: 2017-02-16

Alternate Designations
 1942 TB = 1990 KE3 = 1994 LK10 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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