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16972 Neish (1998 WK11)
Classification: Main-belt Asteroid          SPK-ID: 2016972
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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1827585057265899 1.245e-08  
a 2.53907442769643 1.0539e-08 au
q 2.075036979362034 3.6239e-08 au
i 9.769211417869281 1.1805e-06 deg
node 83.51086316257545 5.0111e-06 deg
peri 182.9621734854982 6.5856e-06 deg
M 348.0950002228578 5.8149e-06 deg
tp 2459445.369564064060
(2021-Aug-18.86956406)
2.3874e-05 TDB
period 1477.786089239627
4.05
9.2008e-06
2.519e-08
d
yr
n .2436076524344824 1.5167e-09 deg/d
Q 3.003111876030826 1.2465e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2204  
   data-arc span      9707 days (26.58 yr)  
   first obs. used      1994-12-01  
   last obs. used      2021-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46194  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:17:05  

Additional Information
 Earth MOID = 1.0592 au 
 Jupiter MOID = 2.08515 au 
 T_jup = 3.403 
[ 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 13.84   n/a MPO614063  
rotation period rot_per 76.6286 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]

16972 Neish           Discovered 1998 Nov. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Catherine D. Neish (b. 1981) is a professor at the University of Western Ontario who studies Titan, the Moon and Venus using orbital radar. Previously known by the moniker Katie Dot, she is an avid scuba diver, a champion for social justice, and mother to Penelope.
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 2017-12-03Last Updated: 2017-12-07

Alternate Designations
 1998 WK11 = 1994 XS2 = 1999 XZ164 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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