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16037 Sheehan (1999 GX8)
Classification: Outer Main-belt Asteroid          SPK-ID: 2016037
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05068441450702644 3.0949e-08  
a 3.225231340024016 1.9669e-08 au
q 3.061762377905187 9.5901e-08 au
i 15.30717398152098 4.1796e-06 deg
node 187.1898347531572 1.3127e-05 deg
peri 102.7252315048404 4.6616e-05 deg
M 162.4786914631975 4.6078e-05 deg
tp 2458045.653312610405
(2017-Oct-19.15331261)
0.00026875 TDB
period 2115.630082718353
5.79
1.9354e-05
5.299e-08
d
yr
n .1701620727274966 1.5566e-09 deg/d
Q 3.388700302142845 2.0666e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1899  
   data-arc span      14038 days (38.43 yr)  
   first obs. used      1982-05-22  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5073  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:29:45  

Additional Information
 Earth MOID = 2.09341 au 
 Jupiter MOID = 1.7435 au 
 T_jup = 3.130 
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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 13.0   n/a MPO502292  
diameter diameter 14.299 km 0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.066   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16037 Sheehan           Discovered 1999 Apr. 10 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Astronomy historian and psychiatrist William Patrick Sheehan (b. 1954) is a prolific author and the biographer of E. E. Barnard. He has traced the development of early studies of the moon and planets and of the Milky Way, and he has solved several long-standing puzzles in the history of astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040928/MPCPages.arcLast Updated: 2004-09-28

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Alternate Designations
 1999 GX8 = 1982 KS1 
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