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49808 (1999 XD40)
Classification: Main-belt Asteroid          SPK-ID: 2049808
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1038359520165013 3.4784e-08  
a 2.387641361181767 9.4098e-09 au
q 2.139718347369483 8.5058e-08 au
i 13.00711767902701 3.4997e-06 deg
node 105.854946121535 1.7297e-05 deg
peri 329.5789683714844 2.5468e-05 deg
M 237.0645125312828 1.8921e-05 deg
tp 2459460.679040383513
(2021-Sep-03.17904038)
7.1741e-05 TDB
period 1347.572275094453
3.69
7.9663e-06
2.181e-08
d
yr
n .2671470812018355 1.5793e-09 deg/d
Q 2.63556437499405 1.0387e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1416  
   data-arc span      8094 days (22.16 yr)  
   first obs. used      1998-08-20  
   last obs. used      2020-10-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48105  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:30:46  

Additional Information
 Earth MOID = 1.16451 au 
 Jupiter MOID = 2.57307 au 
 T_jup = 3.492 
[ 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 14.7   n/a MPO436131  
diameter diameter 4.255 km 0.854 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.170   0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

49808 (1999 XD40)          Discovered 1999-Dec-06 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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