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18575 (1997 WS31)
Classification: Main-belt Asteroid          SPK-ID: 2018575
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09218780294253882 3.4107e-08  
a 2.255840028448983 8.0613e-09 au
q 2.047879092436437 7.6894e-08 au
i 7.618220927653715 3.7875e-06 deg
node 233.2008797144226 2.8713e-05 deg
peri 219.8379185729013 3.6515e-05 deg
M 317.1350893785569 2.3723e-05 deg
tp 2459543.853445972873
(2021-Nov-25.35344597)
8.1902e-05 TDB
period 1237.544643886353
3.39
6.6336e-06
1.816e-08
d
yr
n .2908985964897925 1.5593e-09 deg/d
Q 2.463800964461529 8.8044e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1068  
   data-arc span      17246 days (47.22 yr)  
   first obs. used      1973-09-20  
   last obs. used      2020-12-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5158  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:32:06  

Additional Information
 Earth MOID = 1.07033 au 
 Jupiter MOID = 2.70516 au 
 T_jup = 3.606 
[ 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 15.69   n/a E2021B10  

18575 (1997 WS31)          Discovered 1997-Nov-29 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 WS31 = 2000 RZ16 = 5135 T-2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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