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39814 (1997 XF8)
Classification: Main-belt Asteroid          SPK-ID: 2039814
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1978916303063409 5.6715e-08  
a 2.540854720232342 1.1163e-08 au
q 2.038040837274002 1.4589e-07 au
i 7.011154140864001 6.0309e-06 deg
node 297.1572402661124 3.4001e-05 deg
peri 185.329169740848 3.5864e-05 deg
M 190.1383196766811 1.3925e-05 deg
tp 2459698.509113296689
(2022-Apr-29.00911330)
6.0348e-05 TDB
period 1479.340604122774
4.05
9.7493e-06
2.669e-08
d
yr
n .2433516655979807 1.6038e-09 deg/d
Q 3.043668603190682 1.3373e-08 au
  Orbit Determination Parameters
   # obs. used (total)      935  
   data-arc span      9279 days (25.40 yr)  
   first obs. used      1994-02-10  
   last obs. used      2019-07-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5005  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 05:52:13  

Additional Information
 Earth MOID = 1.05395 au 
 Jupiter MOID = 2.04613 au 
 T_jup = 3.408 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456372.5 (2013-Mar-21.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1975867864866531 5.6335e-08  
q 2.037499925806372 1.4475e-07 au
tp 2456738.040379980447
(2014-Mar-21.54037998)
4.8759e-05 TDB
node 297.2473320441516 3.4102e-05 deg
peri 184.8854734619935 3.5985e-05 deg
i 7.001478297613208 6.0244e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      935  
   data-arc span      9279 days (25.40 yr)  
   first obs. used      1994-02-10  
   last obs. used      2019-07-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5005  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 05:52:13  

Additional Information
 Jupiter MOID = 2.04613 au 
 T_jup = 3.408 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.173651949224506E-15 -8.140161927456223E-15 -8.46977807173622E-13 -2.5722263275718E-14 -1.329821876098094E-13 6.780273565831914E-16
q -8.140161927456223E-15 2.095330509497694E-14 2.368099490345828E-12 6.724293123578854E-14 3.799195125168748E-13 -1.61330075595737E-15
tp -8.46977807173622E-13 2.368099490345828E-12 2.377457381188511E-9 3.981537479743513E-12 5.67587110350375E-10 -2.825471528795221E-13
node -2.5722263275718E-14 6.724293123578854E-14 3.981537479743513E-12 1.162955461303096E-9 -1.153130847316505E-9 -2.543439582930358E-11
peri -1.329821876098094E-13 3.799195125168748E-13 5.67587110350375E-10 -1.153130847316505E-9 1.294938546364679E-9 2.518002006434345E-11
i 6.780273565831914E-16 -1.61330075595737E-15 -2.825471528795221E-13 -2.543439582930358E-11 2.518002006434345E-11 3.629346031920018E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6   n/a MPO385070  
diameter diameter 3.313 km 0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.233   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39814 (1997 XF8)          Discovered 1997-Dec-07 by ODAS at Caussols
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1997 XF8 = 2000 QK23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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