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49966 (1999 XT231)
Classification: Main-belt Asteroid          SPK-ID: 2049966
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1488324403002673 3.541e-08  
a 2.330023513702984 7.8377e-09 au
q 1.983240428201566 8.3346e-08 au
i 7.146740261484625 4.4234e-06 deg
node 56.99428677929 3.1447e-05 deg
peri 99.88855129818015 3.495e-05 deg
M 354.5252914534492 1.5479e-05 deg
tp 2459416.255925768116
(2021-Jul-20.75592577)
5.5896e-05 TDB
period 1299.088931593037
3.56
6.5548e-06
1.795e-08
d
yr
n .2771172867730786 1.3982e-09 deg/d
Q 2.676806599204403 9.0042e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1386  
   data-arc span      10265 days (28.10 yr)  
   first obs. used      1993-04-27  
   last obs. used      2021-06-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48966  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 07:59:27  

Additional Information
 Earth MOID = 1.00782 au 
 Jupiter MOID = 2.33035 au 
 T_jup = 3.546 
[ 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 15.02   n/a MPCxxxxx  
diameter diameter 6.332 km 0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.047   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49966 (1999 XT231)          Discovered 1999-Dec-08 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XT231 = 2001 NO16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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