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266591 (2008 HX68)
Classification: Outer Main-belt Asteroid          SPK-ID: 2266591
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2451403333281219 6.6669e-08  
a 3.948328375191344 8.1166e-08 au
q 2.980433841208056 2.651e-07 au
i 8.978590712194682 9.5494e-06 deg
node 187.4642648673768 5.0627e-05 deg
peri 121.6858058916017 5.498e-05 deg
M 147.7027591906449 1.8439e-05 deg
tp 2457824.778576310038
(2017-Mar-12.27857631)
0.00013987 TDB
period 2865.618183761015
7.85
8.8363e-05
2.419e-07
d
yr
n .1256273435309912 3.8738e-09 deg/d
Q 4.916222909174632 1.0106e-07 au
  Orbit Determination Parameters
   # obs. used (total)      144  
   data-arc span      6284 days (17.20 yr)  
   first obs. used      2001-08-25  
   last obs. used      2018-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56078  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 11:04:40  

Additional Information
 Earth MOID = 1.97946 au 
 Jupiter MOID = .807642 au 
 T_jup = 2.986 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456926.5 (2014-Sep-26.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2433767383271008 6.6546e-08  
q 2.984886232299136 2.6307e-07 au
tp 2457823.706483348306
(2017-Mar-11.20648335)
0.00014122 TDB
node 187.5048331576594 5.0625e-05 deg
peri 121.4098383043966 5.5076e-05 deg
i 8.978077349251347 9.55e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      144  
   data-arc span      6284 days (17.20 yr)  
   first obs. used      2001-08-25  
   last obs. used      2018-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56078  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 11:04:40  

Additional Information
 Jupiter MOID = .807642 au 
 T_jup = 2.986 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.428427282408544E-15 -1.703212195398088E-14 1.509540695157582E-12 2.336082928296338E-15 2.12147913607365E-13 -3.441255514766966E-15
q -1.703212195398088E-14 6.920473143302729E-14 -5.503478810289722E-12 3.673969075079137E-15 -9.970356696473606E-13 2.046973620220308E-14
tp 1.509540695157582E-12 -5.503478810289722E-12 1.994303501473032E-8 -5.299386908509332E-11 3.103631219233891E-9 1.708932553052898E-11
node 2.336082928296338E-15 3.673969075079137E-15 -5.299386908509332E-11 2.56288683524907E-9 -2.538979421286142E-9 1.809815172843649E-11
peri 2.12147913607365E-13 -9.970356696473606E-13 3.103631219233891E-9 -2.538979421286142E-9 3.033348431642078E-9 -1.558252662820565E-11
i -3.441255514766966E-15 2.046973620220308E-14 1.708932553052898E-11 1.809815172843649E-11 -1.558252662820565E-11 9.120270392040989E-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 15.0   n/a MPO427480  

266591 (2008 HX68)          Discovered 2008-Apr-30 by Spacewatch at Kitt Peak
Reference: 20110218/Numbers.arcLast Updated: 2011-02-22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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