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102859 (1999 WH1)
Classification: Main-belt Asteroid          SPK-ID: 2102859
[ 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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2404732556699559 5.6401e-08  
a 2.340849623299915 1.1293e-08 au
q 1.777937893351195 1.3826e-07 au
i 4.179137126961614 4.0298e-06 deg
node 49.09859787024034 7.3275e-05 deg
peri 335.5941968998608 7.4476e-05 deg
M 345.8814401295786 1.6189e-05 deg
tp 2459251.803453305047
(2021-Feb-06.30345330)		 5.9132e-05 TDB
period 1308.153477360689
3.58		 9.466e-06
2.592e-08		 d
yr
n .2751970668811207 1.9914e-09 deg/d
Q 2.903761353248635 1.4008e-08 au
   Orbit Determination Parameters
   # obs. used (total)      441  
   data-arc span      7726 days (21.15 yr)  
   first obs. used      1999-11-14  
   last obs. used      2021-01-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54436  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:43:57  

Additional Information
 Earth MOID = .781767 au 
 Jupiter MOID = 2.55126 au 
 T_jup = 3.521 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457136.5 (2015-Apr-24.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2414018260529888 5.6086e-08  
q 1.77581592582088 1.3748e-07 au
tp 2456636.647502095696
(2013-Dec-10.14750210)		 4.48e-05 TDB
node 49.15317186184761 7.3189e-05 deg
peri 335.7526585485452 7.4383e-05 deg
i 4.18242653800887 4.0325e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      441  
   data-arc span      7726 days (21.15 yr)  
   first obs. used      1999-11-14  
   last obs. used      2021-01-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54436  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:43:57  

Additional Information
 Jupiter MOID = 2.55126 au 
 T_jup = 3.521 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.145686520528655E-15 -7.703511030659291E-15 -1.580847349154295E-12 -8.717777968751027E-15 -4.289876364965048E-13 -1.082771681658183E-14
q -7.703511030659291E-15 1.889995685572091E-14 3.942853689947239E-12 2.041354245204313E-14 1.075735221542618E-12 2.697265995101089E-14
tp -1.580847349154295E-12 3.942853689947239E-12 2.007011319874107E-9 2.861313564589741E-12 6.229555014113032E-10 8.977949042919209E-12
node -8.717777968751027E-15 2.041354245204313E-14 2.861313564589741E-12 5.356692143646886E-9 -5.341305084203282E-9 -7.273275933440447E-11
peri -4.289876364965048E-13 1.075735221542618E-12 6.229555014113032E-10 -5.341305084203282E-9 5.532890770536132E-9 7.521421184730738E-11
i -1.082771681658183E-14 2.697265995101089E-14 8.977949042919209E-12 -7.273275933440447E-11 7.521421184730738E-11 1.626133842703758E-11

[ 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 16.66   n/a E2021B55  

102859 (1999 WH1)          Discovered 1999-Nov-28 by Klet at Klet
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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