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JPL Small-Body Database Browser
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49963 (1999 XH228)
Classification: Main-belt Asteroid          SPK-ID: 2049963
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2034546664789501 5.6565e-08  
a 2.442138024181998 1.1612e-08 au
q 1.945273646976488 1.4168e-07 au
i 5.690357235836955 5.3958e-06 deg
node 92.47742447631499 5.118e-05 deg
peri 228.1899848162875 5.246e-05 deg
M 157.6130746196437 1.0165e-05 deg
tp 2457990.199851463486
(2017-Aug-24.69985146)
3.9484e-05 TDB
period 1393.970988785992
3.82
9.9421e-06
2.722e-08
d
yr
n .25825501599106 1.8419e-09 deg/d
Q 2.939002401387508 1.3974e-08 au
  Orbit Determination Parameters
   # obs. used (total)      658  
   data-arc span      7466 days (20.44 yr)  
   first obs. used      1998-07-31  
   last obs. used      2019-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54731  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 02:52:54  

Additional Information
 Earth MOID = .936889 au 
 Jupiter MOID = 2.37786 au 
 T_jup = 3.466 
[ 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 15.6   n/a MPO381628  

49963 (1999 XH228)          Discovered 1999-Dec-14 by Spacewatch at Kitt Peak
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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