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JPL Small-Body Database Browser
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49783 (1999 XW9)
Classification: Main-belt Asteroid          SPK-ID: 2049783
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2284569060449318 3.9015e-08  
a 2.334502517567308 1.1457e-08 au
q 1.801169295249777 9.2616e-08 au
i 3.105555073348441 4.2574e-06 deg
node 84.39310915672519 9.816e-05 deg
peri 231.9646266419545 9.8719e-05 deg
M 290.0312521588607 1.1968e-05 deg
tp 2458853.716235460046
(2020-Jan-05.21623546)
4.3873e-05 TDB
period 1302.836588880882
3.57
9.5909e-06
2.626e-08
d
yr
n .2763201487219781 2.0342e-09 deg/d
Q 2.86783573988484 1.4075e-08 au
  Orbit Determination Parameters
   # obs. used (total)      606  
   data-arc span      10100 days (27.65 yr)  
   first obs. used      1991-09-14  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60248  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:41:18  

Additional Information
 Earth MOID = .788789 au 
 Jupiter MOID = 2.43237 au 
 T_jup = 3.531 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9   n/a MPO436131  

49783 (1999 XW9)          Discovered 1999-Dec-04 by Spacewatch at Kitt Peak
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XW9 = 1991 RZ20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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