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JPL Small-Body Database Browser
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49921 (1999 XL174)
Classification: Main-belt Asteroid          SPK-ID: 2049921
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1876797569734982 4.1018e-08  
a 2.41728018815907 8.8667e-09 au
q 1.963605629908524 1.0161e-07 au
i 3.165912591294289 4.1129e-06 deg
node 48.79437033471031 8.1304e-05 deg
peri 324.199267084262 8.2082e-05 deg
M 125.5989880833217 1.2364e-05 deg
tp 2458121.569433713996
(2018-Jan-03.06943371)
4.5777e-05 TDB
period 1372.741982193219
3.76
7.5529e-06
2.068e-08
d
yr
n .2622488455003255 1.4429e-09 deg/d
Q 2.870954746409617 1.0531e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1338  
   data-arc span      10083 days (27.61 yr)  
   first obs. used      1991-09-29  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49925  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:41:39  

Additional Information
 Earth MOID = .964436 au 
 Jupiter MOID = 2.58908 au 
 T_jup = 3.489 
[ 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 MPO337657  
diameter diameter 5.388 km 0.082 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.061   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

49921 (1999 XL174)          Discovered 1999-Dec-10 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XL174 = 1994 LE8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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