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243607 (1998 WJ42)
Classification: Main-belt Asteroid          SPK-ID: 2243607
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .102942384538437 5.1796e-08  
a 2.72073734776892 2.1812e-08 au
q 2.440658157486805 1.4298e-07 au
i 5.674433328912159 6.3381e-06 deg
node 230.0779213972077 5.4688e-05 deg
peri 160.129884732777 6.2431e-05 deg
M 306.7977210488381 3.1868e-05 deg
tp 2459242.745707039169
(2021-Jan-28.24570704)
0.00014648 TDB
period 1639.18644564372
4.49
1.9712e-05
5.397e-08
d
yr
n .2196211425227016 2.6411e-09 deg/d
Q 3.000816538051035 2.4058e-08 au
  Orbit Determination Parameters
   # obs. used (total)      275  
   data-arc span      7584 days (20.76 yr)  
   first obs. used      1998-11-14  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53665  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 04:15:54  

Additional Information
 Earth MOID = 1.44715 au 
 Jupiter MOID = 2.4125 au 
 T_jup = 3.344 
[ 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 16.5   n/a MPO437136  
rotation period rot_per 1.52 h n/a LCDB (Rev. 2019-August); 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:
[Erasmus, N.; McNeill, A.; Mommert, M.; Trilling, D.E.; et al. (2018) Ap. J. Suppl. Series 237, A19.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]

243607 (1998 WJ42)          Discovered 1998-Nov-19 by ODAS at Caussols
Reference: 20100726/Numbers.arcLast Updated: 2010-07-28

[ show close-approach data ]
Alternate Designations
 1998 WJ42 = 2007 VS126 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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