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(1997 WQ23)
Classification: Apollo [NEO, PHA]          SPK-ID: 3007574
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .49486250568528 2.889e-08  
a 1.737564431611948 4.6641e-09 au
q .8777089431948401 5.1176e-08 au
i 2.448190211739013 6.258e-06 deg
node 55.83770120292929 7.034e-05 deg
peri 296.5675256956565 7.13e-05 deg
M 326.496564520605 4.7169e-06 deg
tp 2459078.356817122715
(2020-Aug-16.85681712)
1.1264e-05 TDB
period 836.5844804606795
2.29
3.3684e-06
9.222e-09
d
yr
n .4303211551351752 1.7326e-09 deg/d
Q 2.597419920029056 6.9721e-09 au
  Orbit Determination Parameters
   # obs. used (total)      184  
   # delay obs. used      2  
   # Doppler obs. used      1  
   data-arc span      8420 days (23.05 yr)  
   first obs. used      1997-11-29  
   last obs. used      2020-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36734  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-19 05:49:49  

Additional Information
 Earth MOID = .0103214 au 
 Jupiter MOID = 2.84566 au 
 T_jup = 3.998 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 20.7   n/a MPO281842  
rotation period rot_per 14.6 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:
[Warner, B.D. (2014) Minor Planet Bull. 41, 113-124.]

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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