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JPL Small-Body Database Browser
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185820 (1999 XW255)
Classification: Main-belt Asteroid          SPK-ID: 2185820
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1322166198998525 5.0301e-08  
a 2.374244289711052 1.4083e-08 au
q 2.06032973490893 1.1524e-07 au
i .8293123774506684 4.6542e-06 deg
node 328.4343942402664 0.000382 deg
peri 233.4201534850416 0.00038271 deg
M 128.7809991572808 2.0847e-05 deg
tp 2458522.491279582173
(2019-Feb-07.99127958)
7.7337e-05 TDB
period 1336.246344386969
3.66
1.1889e-05
3.255e-08
d
yr
n .2694114012077299 2.397e-09 deg/d
Q 2.688158844513173 1.5945e-08 au
  Orbit Determination Parameters
   # obs. used (total)      310  
   data-arc span      7176 days (19.65 yr)  
   first obs. used      1999-12-05  
   last obs. used      2019-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52015  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 20:10:25  

Additional Information
 Earth MOID = 1.05731 au 
 Jupiter MOID = 2.27167 au 
 T_jup = 3.531 
[ 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 17.0   n/a MPO433220  

185820 (1999 XW255)          Discovered 1999-Dec-05 by Spacewatch at Kitt Peak
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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