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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08301440641250667 3.3288e-08  
a 2.886375779003408 1.1691e-08 au
q 2.646765007026004 9.9318e-08 au
i 2.191835699194639 3.6726e-06 deg
node 26.88956658064625 9.6962e-05 deg
peri 350.7170686792752 9.9681e-05 deg
M 56.98786482468744 2.2733e-05 deg
tp 2458916.964384798063
(2020-Mar-08.46438480)
0.00011316 TDB
period 1791.132582115605
4.90
1.0882e-05
2.979e-08
d
yr
n .2009901464551464 1.2211e-09 deg/d
Q 3.125986550980813 1.2661e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1902  
   data-arc span      11108 days (30.41 yr)  
   first obs. used      1990-10-12  
   last obs. used      2021-03-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52388  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:29:49  

Additional Information
 Earth MOID = 1.64693 au 
 Jupiter MOID = 2.30002 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 13.95   n/a MPCxxxxx  

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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