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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1775432781894345 4.8847e-08  
a 2.251241583026501 1.1585e-08 au
q 1.851548772379604 1.0784e-07 au
i 3.15969896797538 6.7655e-06 deg
node 345.3354732933911 8.3547e-05 deg
peri 320.9855066257512 8.5623e-05 deg
M 273.9848814157876 1.8631e-05 deg
tp 2459495.283975585297
(2021-Oct-07.78397559)
6.4712e-05 TDB
period 1233.762540323753
3.38
9.5234e-06
2.607e-08
d
yr
n .2917903471972264 2.2523e-09 deg/d
Q 2.650934393673398 1.3642e-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 = .836008 au 
 Jupiter MOID = 2.59157 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 = 2.59157 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1962-Nov-06 15:24 < 00:01 Hebe 0.0384701784492773 0.0384612763861159 0.0384790811554895 6.5972647839275 6.59726475943295 2437975.141356106 0.661775334205942 509.388809655987 56.7785328645926 29.5955502827212 51000.4592591702 T 15 CATAB v2.0f-lin.ifort 2020-Feb-25 09:26:49 2020-Feb-25 09:26
2027-Jan-22 01:31 < 00:01 Hebe 0.0168223264002869 0.0168184452109367 0.0168262076654419 6.83841139690044 6.83841134286033 2461427.563301579 0.472536821096326 202.267570623484 56.8739220729729 -17.665713243845 17907.1653604654 T 15 CATAB v2.0f-lin.ifort 2020-Feb-25 09:26:49 2020-Feb-25 09:26

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