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243958 (2001 QX208)
Classification: Main-belt Asteroid          SPK-ID: 2243958
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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1774503567536503 4.8825e-08  
a 2.251600841192338 1.159e-08 au
q 1.852053468655939 1.0781e-07 au
i 3.159477791423407 6.7649e-06 deg
node 345.3351323901263 8.3552e-05 deg
peri 320.9374068099728 8.563e-05 deg
M 215.6841674796284 1.8485e-05 deg
tp 2459495.205807268742
(2021-Oct-07.70580727)
6.4773e-05 TDB
period 1234.057881983306
3.38
9.5282e-06
2.609e-08
d
yr
n .2917205142934049 2.2524e-09 deg/d
Q 2.651148213728738 1.3646e-08 au
  Orbit Determination Parameters
   # obs. used (total)      249  
   data-arc span      6744 days (18.46 yr)  
   first obs. used      2001-08-16  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5785  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 09:26:48  

Additional Information
 Earth MOID = .838499 au 
 Jupiter MOID = 2.59167 au 
 T_jup = 3.604 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457156.5 (2015-May-14.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1780972170366273 4.8928e-08  
q 1.850427473805285 1.0813e-07 au
tp 2457027.015544493110
(2015-Jan-04.51554449)
5.9568e-05 TDB
node 345.3849032015992 8.3454e-05 deg
peri 320.8910927707162 8.5519e-05 deg
i 3.162134555735189 6.7678e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      249  
   data-arc span      6744 days (18.46 yr)  
   first obs. used      2001-08-16  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5785  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 09:26:48  

Additional Information
 Jupiter MOID = 2.59167 au 
 T_jup = 3.604 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.393902826109426E-15 -5.271325568784076E-15 1.330599263381519E-12 5.893816669713154E-17 4.085345194336947E-13 1.702080373336807E-16
q -5.271325568784076E-15 1.169115955512037E-14 -2.936434924091838E-12 -1.54205362335816E-15 -8.987824111332778E-13 -2.630692526179331E-16
tp 1.330599263381519E-12 -2.936434924091838E-12 3.548315183673351E-9 -1.165846611139434E-12 1.12609296575156E-9 1.133477761522233E-12
node 5.893816669713154E-17 -1.54205362335816E-15 -1.165846611139434E-12 6.96456762687778E-9 -6.953297701760808E-9 1.092469365654185E-10
peri 4.085345194336947E-13 -8.987824111332778E-13 1.12609296575156E-9 -6.953297701760808E-9 7.313547256846757E-9 -1.087670962151896E-10
i 1.702080373336807E-16 -2.630692526179331E-16 1.133477761522233E-12 1.092469365654185E-10 -1.087670962151896E-10 4.580320443299945E-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 17.83   n/a E2021B55  

243958 (2001 QX208)          Discovered 2001-Aug-23 by LONEOS at Anderson Mesa
Reference: 20100726/Numbers.arcLast Updated: 2010-07-28

[ show close-approach data ]
Alternate Designations
 2001 QX208 = 2008 SU236 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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