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170502 (2003 WM7)
Classification: Apollo [NEO]          SPK-ID: 2170502
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 82 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8801432216127089 6.9122e-08  
a 2.476233275952509 1.8852e-08 au
q .2967933429910757 1.7128e-07 au
i 10.40829371207483 1.9076e-05 deg
node 48.55184385403631 3.8254e-05 deg
peri 143.7854167645122 4.6048e-05 deg
M 102.8265013293386 9.8161e-06 deg
tp 2458793.974007853931
(2019-Nov-06.47400785)
3.4217e-05 TDB
period 1423.264968471978
3.90
1.6253e-05
4.45e-08
d
yr
n .2529395495390414 2.8885e-09 deg/d
Q 4.655673208913941 3.5444e-08 au
  Orbit Determination Parameters
   # obs. used (total)      543  
   # delay obs. used      2  
   # Doppler obs. used      1  
   data-arc span      5802 days (15.89 yr)  
   first obs. used      2003-11-18  
   last obs. used      2019-10-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36389  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:44:32  

Additional Information
 Earth MOID = .0729779 au 
 Jupiter MOID = .494377 au 
 T_jup = 2.745 
[ 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 17.2   n/a MPO226968  
rotation period rot_per 7.2 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Vaduvescu, O.; Aznar, A.M.; Tudor, V.; Predatu, M.; et al. (2017) Earth, Moon, and Planets 120, 41-100.]

170502 (2003 WM7)          Discovered 2003-Nov-18 by NEAT at Palomar
Reference: 20071124/Numbers.arcLast Updated: 2007-11-26

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