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199003 (2005 WJ56)
Classification: Aten [NEO, PHA]          SPK-ID: 2199003
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 105 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1520555940204687 4.3204e-08  
a .958966625512236 3.8322e-09 au
q .8131503856241686 4.188e-08 au
i 21.61601163252803 8.1271e-06 deg
node 288.0531640524682 9.7604e-07 deg
peri 297.693260585128 4.8861e-06 deg
M 177.9195010003376 3.0888e-05 deg
tp 2459030.978527036242
(2020-Jun-30.47852704)
2.8463e-05 TDB
period 343.0075394986469
0.94
2.0561e-06
5.629e-09
d
yr
n 1.049539612237649 6.2912e-09 deg/d
Q 1.104782865400303 4.4149e-09 au
  Orbit Determination Parameters
   # obs. used (total)      555  
   # delay obs. used      3  
   # Doppler obs. used      2  
   data-arc span      5552 days (15.20 yr)  
   first obs. used      2005-11-29  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38661  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:43:17  

Additional Information
 Earth MOID = .022861 au 
 Jupiter MOID = 3.96836 au 
 T_jup = 6.215 
[ 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 18.20   n/a E2021B69  
rotation period rot_per 4.379 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm]

199003 (2005 WJ56)          Discovered 2005-Nov-29 by LINEAR at Socorro
Reference: 20081113/Numbers.arcLast Updated: 2008-11-17

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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