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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1045658421479991 5.0886e-08  
a 2.386538940688416 9.698e-09 au
q 2.136988486536338 1.2124e-07 au
i 13.00351253496828 3.8232e-06 deg
node 105.8668812378195 2.0503e-05 deg
peri 329.1040524981804 3.0219e-05 deg
M 130.7426445409784 2.1075e-05 deg
tp 2458111.435680935814
(2017-Dec-23.93568094)
7.8493e-05 TDB
period 1346.639082307411
3.69
8.2084e-06
2.247e-08
d
yr
n .267332208555209 1.6295e-09 deg/d
Q 2.636089394840494 1.0712e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1247  
   data-arc span      7672 days (21.00 yr)  
   first obs. used      1998-08-20  
   last obs. used      2019-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49666  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 02:17:09  

Additional Information
 Earth MOID = 1.16197 au 
 Jupiter MOID = 2.57567 au 
 T_jup = 3.493 
[ 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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