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216420 (2008 SJ272)
Classification: Main-belt Asteroid          SPK-ID: 2216420
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03547855785760867 4.1937e-08  
a 2.5567440329463 1.8966e-08 au
q 2.46603444184632 1.081e-07 au
i 2.353142336577117 5.3214e-06 deg
node 223.3012693725715 9.464e-05 deg
peri 86.22608670854189 0.00013531 deg
M 133.1143801215628 9.5978e-05 deg
tp 2458844.356737883314
(2019-Dec-26.85673788)
0.00040038 TDB
period 1493.238928660335
4.09
1.6616e-05
4.549e-08
d
yr
n .241086669447451 2.6826e-09 deg/d
Q 2.647453624046281 1.9639e-08 au
  Orbit Determination Parameters
   # obs. used (total)      415  
   data-arc span      6857 days (18.77 yr)  
   first obs. used      2002-04-04  
   last obs. used      2021-01-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53373  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:54:44  

Additional Information
 Earth MOID = 1.45213 au 
 Jupiter MOID = 2.42397 au 
 T_jup = 3.435 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457559.5 (2016-Jun-20.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03651993878410559 4.2494e-08  
q 2.463721508116276 1.1015e-07 au
tp 2457358.210864494176
(2015-Dec-01.71086449)
0.00039398 TDB
node 223.3380051900286 9.4547e-05 deg
peri 87.96756613046993 0.00013301 deg
i 2.353698966466548 5.3258e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      415  
   data-arc span      6857 days (18.77 yr)  
   first obs. used      2002-04-04  
   last obs. used      2021-01-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53373  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:54:44  

Additional Information
 Jupiter MOID = 2.42397 au 
 T_jup = 3.435 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.805771695650736E-15 -4.614508305008914E-15 7.228040594977852E-12 -1.179434435005671E-14 1.65069881445586E-12 1.775777907390074E-15
q -4.614508305008914E-15 1.213248112076533E-14 -2.159052452991889E-11 3.318637429652762E-14 -4.954546228760322E-12 -4.501993491398797E-15
tp 7.228040594977852E-12 -2.159052452991889E-11 1.552170899366982E-7 -2.470316973477667E-10 3.686297019582385E-8 1.342600647373143E-11
node -1.179434435005671E-14 3.318637429652762E-14 -2.470316973477667E-10 8.939222701856145E-9 -8.989730525022467E-9 -1.523397308833826E-10
peri 1.65069881445586E-12 -4.954546228760322E-12 3.686297019582385E-8 -8.989730525022467E-9 1.769050995733594E-8 1.553343211130517E-10
i 1.775777907390074E-15 -4.501993491398797E-15 1.342600647373143E-11 -1.523397308833826E-10 1.553343211130517E-10 2.836364026178184E-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 16.61   n/a E2021B55  

216420 (2008 SJ272)          Discovered 2008-Sep-22 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20090607/Numbers.arcLast Updated: 2009-06-08
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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