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377097 (2002 WQ4)
Classification: Apollo [NEO, PHA]          SPK-ID: 2377097
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 67 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5551700462035052 2.6816e-08  
a 1.959598915318418 8.8317e-09 au
q .8716882949607531 5.3066e-08 au
i 3.940748952702478 1.1222e-05 deg
node 267.052173302421 5.9167e-05 deg
peri 244.4446457596591 6.205e-05 deg
M 105.3054137128311 9.4357e-06 deg
tp 2458707.412423114384
(2019-Aug-11.91242311)
2.543e-05 TDB
period 1001.957296958663
2.74
6.7736e-06
1.855e-08
d
yr
n .3592967495648194 2.429e-09 deg/d
Q 3.047509535676082 1.3735e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -2.434286590854385E-14 6.015E-15
ALN [SET] 1. n/a
NK [SET] 0. n/a
NM [SET] 2. n/a
R0 [SET] 1. n/a
  Orbit Determination Parameters
   # obs. used (total)      230  
   data-arc span      23210 days (63.55 yr)  
   first obs. used      1950-12-11  
   last obs. used      2014-06-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5804  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:17:27  

Additional Information
 Earth MOID = .0198223 au 
 Jupiter MOID = 1.98651 au 
 T_jup = 3.674 
 Nongravitational accels. using nonstandard g(r) = (1 au/ r)^2 
[ 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 19.6   n/a MPO281787  
rotation period rot_per 36. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Warner, B.D. (2014) Minor Planet Bull. 41, 157-168.]

377097 (2002 WQ4)          Discovered 2002-Nov-24 by NEAT at Palomar
Reference: Last Updated: 2013-11-20

[ show close-approach data ]
Alternate Designations
 2002 WQ4 = 1950 XB1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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