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469755 (2005 QB21)
Classification: Main-belt Asteroid          SPK-ID: 2469755
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2186766365848651 7.935e-08  
a 2.388431544184671 1.6361e-08 au
q 1.866137367389172 1.9701e-07 au
i 2.712195523076844 6.5437e-06 deg
node 20.1051233909432 0.00012489 deg
peri 322.1271653274488 0.00012565 deg
M 357.4189733006386 1.4795e-05 deg
tp 2459010.166241041185
(2020-Jun-09.66624104)
5.547e-05 TDB
period 1348.241293159675
3.69
1.3853e-05
3.793e-08
d
yr
n .2670145187114992 2.7436e-09 deg/d
Q 2.910725720980171 1.9939e-08 au
  Orbit Determination Parameters
   # obs. used (total)      149  
   data-arc span      5026 days (13.76 yr)  
   first obs. used      2005-08-26  
   last obs. used      2019-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65097  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 13:59:27  

Additional Information
 Earth MOID = .859081 au 
 Jupiter MOID = 2.49536 au 
 T_jup = 3.499 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457363.5 (2015-Dec-07.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2191270075851082 7.9264e-08  
q 1.864691786325682 1.9673e-07 au
tp 2457663.092581942840
(2016-Oct-01.59258194)
4.815e-05 TDB
node 20.15433470551681 0.00012477 deg
peri 322.3795860894134 0.00012554 deg
i 2.713957920877198 6.5463e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      149  
   data-arc span      5026 days (13.76 yr)  
   first obs. used      2005-08-26  
   last obs. used      2019-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65097  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 13:59:27  

Additional Information
 Jupiter MOID = 2.49536 au 
 T_jup = 3.499 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.282745404343322E-15 -1.557140814304288E-14 -6.971474085669761E-13 -1.367637921031561E-13 1.539317962676654E-13 -1.403120183883303E-14
q -1.557140814304288E-14 3.87015669812486E-14 1.924742074455728E-12 3.402136157115159E-13 -3.363596728094527E-13 3.508304452352384E-14
tp -6.971474085669761E-13 1.924742074455728E-12 2.318413125222414E-9 3.321852682725154E-11 6.629116881258063E-10 2.794402342473493E-12
node -1.367637921031561E-13 3.402136157115159E-13 3.321852682725154E-11 1.556836499489925E-8 -1.554459508538086E-8 -1.792740770118052E-10
peri 1.539317962676654E-13 -3.363596728094527E-13 6.629116881258063E-10 -1.554459508538086E-8 1.575976033405271E-8 1.794248505514708E-10
i -1.403120183883303E-14 3.508304452352384E-14 2.794402342473493E-12 -1.792740770118052E-10 1.794248505514708E-10 4.285345873855615E-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 17.2   n/a MPO477209  

469755 (2005 QB21)          Discovered 2005-Aug-26 by LONEOS at Anderson Mesa
Reference: Last Updated: 2016-08-22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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