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JPL Small-Body Database Browser
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49913 (1999 XE171)
Classification: Main-belt Asteroid          SPK-ID: 2049913
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1058572066709764 2.9826e-08  
a 2.227016470135192 8.5529e-09 au
q 1.991270727396423 6.8003e-08 au
i 3.926161767323629 4.5206e-06 deg
node 347.2932303717595 4.8455e-05 deg
peri 87.67673547792056 5.4012e-05 deg
M 312.1279417135922 2.5888e-05 deg
tp 2458761.922165860043
(2019-Oct-05.42216586)
8.7721e-05 TDB
period 1213.901841486414
3.32
6.993e-06
1.915e-08
d
yr
n .2965643412808259 1.7084e-09 deg/d
Q 2.462762212873961 9.4583e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1040  
   data-arc span      15629 days (42.79 yr)  
   first obs. used      1977-02-18  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52358  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:24:51  

Additional Information
 Earth MOID = 1.01066 au 
 Jupiter MOID = 2.73651 au 
 T_jup = 3.634 
[ 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 15.5   n/a MPO452849  
diameter diameter 1.953 km 0.200 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.351   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49913 (1999 XE171)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XE171 = 1977 DY2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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