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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1827721178647668 1.2455e-08  
a 2.539332621573446 1.2184e-08 au
q 2.075213420365377 3.6742e-08 au
i 9.769056209958759 1.1873e-06 deg
node 83.51239164977302 5.0412e-06 deg
peri 182.9187124223574 7.1298e-06 deg
M 300.384769547499 7.944e-06 deg
tp 2459445.255545792302
(2021-Aug-18.75554579)
3.3207e-05 TDB
period 1478.011505053774
4.05
1.0638e-05
2.913e-08
d
yr
n .2435704991260553 1.753e-09 deg/d
Q 3.003451822781515 1.4411e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1999  
   data-arc span      9608 days (26.31 yr)  
   first obs. used      1994-12-01  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48274  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:26:34  

Additional Information
 Earth MOID = 1.05764 au 
 Jupiter MOID = 2.08586 au 
 T_jup = 3.403 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457179.5 (2015-Jun-06.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1837946390067602 1.2419e-08  
q 2.071919060216288 3.6623e-08 au
tp 2456488.627108369997
(2013-Jul-15.12710837)
3.2292e-05 TDB
node 83.58236203733703 5.0421e-06 deg
peri 182.7765990601253 7.1204e-06 deg
i 9.771035754191141 1.1874e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1999  
   data-arc span      9608 days (26.31 yr)  
   first obs. used      1994-12-01  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48274  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:26:34  

Additional Information
 Jupiter MOID = 2.08586 au 
 T_jup = 3.403 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.54232777636976E-16 -4.406507768474033E-16 8.976297772444298E-14 -1.157195693221938E-14 2.218163381019188E-14 5.394548978606776E-16
q -4.406507768474033E-16 1.341270618765542E-15 -3.20685543219673E-13 2.795593791132142E-14 -6.281063384643622E-14 -1.202116648206234E-15
tp 8.976297772444298E-14 -3.20685543219673E-13 1.042778190060562E-9 2.294671238603072E-11 1.666396762772872E-10 -3.933840339947785E-12
node -1.157195693221938E-14 2.795593791132142E-14 2.294671238603072E-11 2.542279448228536E-11 -2.008282892159166E-11 -1.005164092424217E-12
peri 2.218163381019188E-14 -6.281063384643622E-14 1.666396762772872E-10 -2.008282892159166E-11 5.069977165677776E-11 1.919884006951975E-13
i 5.394548978606776E-16 -1.202116648206234E-15 -3.933840339947785E-12 -1.005164092424217E-12 1.919884006951975E-13 1.409900184986495E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.82   n/a E2021B10  
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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