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312477 (2008 SD278)
Classification: Jupiter Trojan          SPK-ID: 2312477
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06877746105168797 1.1305e-07  
a 5.180977704191552 1.8947e-07 au
q 4.824643211931853 6.7416e-07 au
i 6.579867621112773 7.5917e-06 deg
node 269.7289723288296 0.00010729 deg
peri 103.1400675764676 0.00014224 deg
M 352.4002279027705 8.4177e-05 deg
tp 2459091.431442357168
(2020-Aug-29.93144236)
0.0010061 TDB
period 4307.408015631692
11.79
0.00023628
6.469e-07
d
yr
n .08357694434647261 4.5845e-09 deg/d
Q 5.53731219645125 2.025e-07 au
  Orbit Determination Parameters
   # obs. used (total)      166  
   data-arc span      8778 days (24.03 yr)  
   first obs. used      1996-10-12  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5588  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 18:47:16  

Additional Information
 Earth MOID = 3.83304 au 
 Jupiter MOID = .0191521 au 
 T_jup = 2.982 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458094.5 (2017-Dec-07.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06786149700424188 1.132e-07  
q 4.827129382378128 6.7304e-07 au
tp 2459088.989888906280
(2020-Aug-27.48988891)
0.0010216 TDB
node 269.7327509205365 0.00010729 deg
peri 102.8585663171461 0.00014316 deg
i 6.58031814735585 7.5923e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      166  
   data-arc span      8778 days (24.03 yr)  
   first obs. used      1996-10-12  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5588  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 18:47:16  

Additional Information
 Jupiter MOID = .0191521 au 
 T_jup = 2.982 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.281355758070679E-14 -7.390829881197045E-14 1.927274648291301E-12 -2.059321685827503E-14 7.972739420799944E-13 -1.744108510489942E-14
q -7.390829881197045E-14 4.529834720057338E-13 -5.169248524155848E-11 1.926322860014068E-13 -9.088277641921349E-12 1.085745784424492E-13
tp 1.927274648291301E-12 -5.169248524155848E-11 1.043738894961929E-6 -6.478925033097256E-10 9.717200039916243E-8 1.81927587718106E-11
node -2.059321685827503E-14 1.926322860014068E-13 -6.478925033097256E-10 1.151161987800189E-8 -1.149720785270898E-8 1.79307500444192E-10
peri 7.972739420799944E-13 -9.088277641921349E-12 9.717200039916243E-8 -1.149720785270898E-8 2.049566423155233E-8 -1.774774941231422E-10
i -1.744108510489942E-14 1.085745784424492E-13 1.81927587718106E-11 1.79307500444192E-10 -1.774774941231422E-10 5.764342008181809E-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 13.9   n/a MPO455303  

312477 (2008 SD278)          Discovered 2008-Sep-28 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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