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49965 (1999 XA231)
Classification: Main-belt Asteroid          SPK-ID: 2049965
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1771018712882186 4.7499e-08  
a 2.666831974861586 1.1213e-08 au
q 2.194531041702344 1.2607e-07 au
i 14.27817230396305 5.3754e-06 deg
node 39.62253755875898 1.4424e-05 deg
peri 339.7033815729463 1.7857e-05 deg
M 342.9999080080418 1.0365e-05 deg
tp 2459075.617422565760
(2020-Aug-14.11742257)
4.5838e-05 TDB
period 1590.713281814339
4.36
1.0032e-05
2.747e-08
d
yr
n .2263135689603286 1.4273e-09 deg/d
Q 3.139132908020829 1.3199e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1982  
   data-arc span      8069 days (22.09 yr)  
   first obs. used      1998-09-27  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41531  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:29:54  

Additional Information
 Earth MOID = 1.20357 au 
 Jupiter MOID = 2.32358 au 
 T_jup = 3.317 
[ 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 12.9   n/a MPO302341  
diameter diameter 7.021 km 0.385 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.188   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49965 (1999 XA231)          Discovered 1999-Dec-07 by CSS at Catalina
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XA231 = 1985 VW5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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