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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09274111329379511 4.7241e-08  
a 2.839061308496563 1.5656e-08 au
q 2.575763602037253 1.3702e-07 au
i 3.270121346310221 3.7777e-06 deg
node 112.7895595948212 8.788e-05 deg
peri 252.9057230922682 9.0168e-05 deg
M 278.6667614150367 2.0315e-05 deg
tp 2458995.253644617532
(2020-May-25.75364462)		 9.9118e-05 TDB
period 1747.272265739884
4.78		 1.4453e-05
3.957e-08		 d
yr
n .2060354342358646 1.7043e-09 deg/d
Q 3.102359014955873 1.7108e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1248  
   data-arc span      11148 days (30.52 yr)  
   first obs. used      1989-02-15  
   last obs. used      2019-08-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52657  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:26:21  

Additional Information
 Earth MOID = 1.5753 au 
 Jupiter MOID = 2.338 au 
 T_jup = 3.301 
[ 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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