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49899 (1999 XA163)
Classification: Main-belt Asteroid          SPK-ID: 2049899
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07673567913175565 3.0433e-08  
a 2.234359853267819 6.6515e-09 au
q 2.062904732502583 6.7676e-08 au
i 1.54797857792165 3.5228e-06 deg
node 250.2061551190912 0.0001413 deg
peri 180.247795903903 0.00014379 deg
M 71.9351639174379 2.6455e-05 deg
tp 2458756.737529487694
(2019-Sep-30.23752949)
8.9478e-05 TDB
period 1219.910883711178
3.34
5.4473e-06
1.491e-08
d
yr
n .2951035233859201 1.3177e-09 deg/d
Q 2.405814974033055 7.1619e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1446  
   data-arc span      15639 days (42.82 yr)  
   first obs. used      1977-03-12  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55169  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 07:47:46  

Additional Information
 Earth MOID = 1.0772 au 
 Jupiter MOID = 2.76406 au 
 T_jup = 3.635 
[ 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 15.2   n/a MPO452849  
diameter diameter 2.064 km 0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.314   0.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49899 (1999 XA163)          Discovered 1999-Dec-08 by Spacewatch at Kitt Peak
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XA163 = 1977 EH5 = 1995 QO2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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