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243683 (1999 XE99)
Classification: Main-belt Asteroid          SPK-ID: 2243683
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2909132403068265 6.1199e-08  
a 2.521697939802706 1.364e-08 au
q 1.788102621059652 1.5582e-07 au
i 6.319318045943271 6.266e-06 deg
node 63.93820396671529 3.6872e-05 deg
peri 319.64302340004 3.8224e-05 deg
M 74.89686027427678 1.1933e-05 deg
tp 2458696.201974951674
(2019-Jul-31.70197495)
4.7913e-05 TDB
period 1462.641940079047
4.00
1.1868e-05
3.249e-08
d
yr
n .2461299584917852 1.9971e-09 deg/d
Q 3.255293258545759 1.7609e-08 au
  Orbit Determination Parameters
   # obs. used (total)      473  
   data-arc span      9816 days (26.87 yr)  
   first obs. used      1993-03-18  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5011  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 09:23:53  

Additional Information
 Earth MOID = .797759 au 
 Jupiter MOID = 2.20881 au 
 T_jup = 3.387 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457177.5 (2015-Jun-04.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2913457032364445 6.083e-08  
q 1.786758552301882 1.5457e-07 au
tp 2457229.198936118184
(2015-Jul-25.69893612)
4.6039e-05 TDB
node 64.06712044084979 3.7035e-05 deg
peri 318.8344746696932 3.8355e-05 deg
i 6.309010986048445 6.25e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      473  
   data-arc span      9816 days (26.87 yr)  
   first obs. used      1993-03-18  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5011  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 09:23:53  

Additional Information
 Jupiter MOID = 2.20881 au 
 T_jup = 3.387 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.700269336836018E-15 -9.384841932774156E-15 1.942178460068318E-12 -5.626807711944667E-15 3.650634463971965E-13 -1.193739055619428E-15
q -9.384841932774156E-15 2.389339411510474E-14 -4.891714749273574E-12 1.351383116020454E-14 -9.218472762523854E-13 3.217547403057538E-15
tp 1.942178460068318E-12 -4.891714749273574E-12 2.119580253195364E-9 -6.264777063704573E-12 4.668201385264424E-10 -2.302142625749771E-12
node -5.626807711944667E-15 1.351383116020454E-14 -6.264777063704573E-12 1.371613597201229E-9 -1.364075904999651E-9 -1.045833691610267E-11
peri 3.650634463971965E-13 -9.218472762523854E-13 4.668201385264424E-10 -1.364075904999651E-9 1.471098578331746E-9 9.811057544750168E-12
i -1.193739055619428E-15 3.217547403057538E-15 -2.302142625749771E-12 -1.045833691610267E-11 9.811057544750168E-12 3.906235108197823E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8   n/a MPO503159  
diameter diameter 3.394 km 0.888 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.067   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

243683 (1999 XE99)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20100726/Numbers.arcLast Updated: 2010-07-28
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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