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18573 (1997 WM23)
Classification: Main-belt Asteroid          SPK-ID: 2018573
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09237225053763945 4.1528e-08  
a 2.836976767111218 1.187e-08 au
q 2.574918838410158 1.1733e-07 au
i 3.270982702095389 3.1468e-06 deg
node 112.7895539629571 7.938e-05 deg
peri 253.4611094072477 8.1851e-05 deg
M 41.86387423788939 1.8802e-05 deg
tp 2458997.536000608766
(2020-May-28.03600061)
9.1304e-05 TDB
period 1745.348253380572
4.78
1.0954e-05
2.999e-08
d
yr
n .206262560668173 1.2945e-09 deg/d
Q 3.099034695812277 1.2967e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1558  
   data-arc span      11704 days (32.04 yr)  
   first obs. used      1989-02-15  
   last obs. used      2021-03-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49893  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:32:05  

Additional Information
 Earth MOID = 1.57391 au 
 Jupiter MOID = 2.34592 au 
 T_jup = 3.302 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2   n/a MPO350950  
diameter diameter 4.730 km 0.298 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.165   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18573 (1997 WM23)          Discovered 1997-Nov-28 by ODAS at Caussols
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 WM23 = 1999 JM128 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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