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18830 Pothier (1999 NZ35)
Classification: Main-belt Asteroid          SPK-ID: 2018830
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1172671664773776 4.1659e-08  
a 2.248791819304181 8.9012e-09 au
q 1.985082374656873 9.3306e-08 au
i 2.765669843179486 4.126e-06 deg
node 290.9772698749 8.8328e-05 deg
peri 225.578285115297 8.9697e-05 deg
M 205.6280692461442 1.6803e-05 deg
tp 2459528.687526891010
(2021-Nov-10.18752689)
5.8539e-05 TDB
period 1231.749248404178
3.37
7.3133e-06
2.002e-08
d
yr
n .2922672779921778 1.7353e-09 deg/d
Q 2.512501263951489 9.945e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1446  
   data-arc span      9347 days (25.59 yr)  
   first obs. used      1993-10-12  
   last obs. used      2019-05-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49899  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 22:47:15  

Additional Information
 Earth MOID = .995837 au 
 Jupiter MOID = 2.4786 au 
 T_jup = 3.618 
[ 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 14.5   n/a MPO384915  
rotation period rot_per 27.215 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

18830 Pothier           Discovered 1999 July 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
David Guillaume Pothier (b. 1985) was awarded third place in the 2003 Intel International Science and Engineering Fair for his mathematics team project. He was also awarded first place in the American Mathematical Society's Karl Menger Memorial Prize. He attends the Fairview High School, Boulder, Colorado, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040830/MPCPages.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1999 NZ35 = 1993 TR9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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