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JPL Small-Body Database Browser
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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2710189244244007 4.6452e-08  
a 2.547881372009057 7.506e-09 au
q 1.857357303006196 1.2103e-07 au
i 9.352193065893067 4.0997e-06 deg
node 150.5902440125772 1.7267e-05 deg
peri 222.146815513894 1.8155e-05 deg
M 304.1098075729734 5.9584e-06 deg
tp 2458831.121788805835
(2019-Dec-13.62178881)
2.5136e-05 TDB
period 1485.481447903429
4.07
6.5643e-06
1.797e-08
d
yr
n .2423456721779292 1.0709e-09 deg/d
Q 3.238405441011918 9.5402e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2499  
   data-arc span      28184 days (77.16 yr)  
   first obs. used      1942-10-03  
   last obs. used      2019-12-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4696  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:19:42  

Additional Information
 Earth MOID = .867577 au 
 Jupiter MOID = 2.24703 au 
 T_jup = 3.371 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1   n/a MPO435811  
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. 2019-January); 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

[ show close-approach data ]
Alternate Designations
 1942 TB = 1990 KE3 = 1994 LK10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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