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49915 (1999 XU171)
Classification: Main-belt Asteroid          SPK-ID: 2049915
[ 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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1247100823709638 3.2974e-08  
a 2.263250382826045 7.6072e-09 au
q 1.981000241157694 7.7031e-08 au
i 4.605940802342966 4.3221e-06 deg
node 322.8786939394386 4.9541e-05 deg
peri 108.5065499885329 5.4009e-05 deg
M 22.04041749799079 1.9918e-05 deg
tp 2458924.359688947304
(2020-Mar-15.85968895)		 6.8816e-05 TDB
period 1243.64758432863
3.40		 6.2702e-06
1.717e-08		 d
yr
n .2894710724616911 1.4595e-09 deg/d
Q 2.545500524494397 8.5559e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1073  
   data-arc span      14830 days (40.60 yr)  
   first obs. used      1980-03-23  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48739  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:30:12  

Additional Information
 Earth MOID = 1.00134 au 
 Jupiter MOID = 2.68924 au 
 T_jup = 3.604 
[ 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 15.4   n/a MPO502489  
diameter diameter 2.904 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.276   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49915 (1999 XU171)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XU171 = 1980 FB7 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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