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18478 (1995 WT15)
Classification: Main-belt Asteroid          SPK-ID: 2018478
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08271216896690411 3.9118e-08  
a 2.885754803781444 1.3276e-08 au
q 2.647067764854017 1.1849e-07 au
i 2.192067046851375 3.941e-06 deg
node 26.89800487847171 0.00010107 deg
peri 350.4192304656933 0.00010375 deg
M 296.6176781854257 2.3464e-05 deg
tp 2458915.748632393580
(2020-Mar-07.24863239)
0.00011685 TDB
period 1790.554596496225
4.90
1.2356e-05
3.383e-08
d
yr
n .2010550254677805 1.3874e-09 deg/d
Q 3.12444184270887 1.4374e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1652  
   data-arc span      10640 days (29.13 yr)  
   first obs. used      1990-10-12  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54611  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:28:45  

Additional Information
 Earth MOID = 1.64776 au 
 Jupiter MOID = 2.30287 au 
 T_jup = 3.286 
[ 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 13.9   n/a MPO350949  

18478 (1995 WT15)          Discovered 1995-Nov-17 by Spacewatch at Kitt Peak
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 WT15 = 1998 HC66 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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