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423445 (2005 ST39)
Classification: Main-belt Asteroid          SPK-ID: 2423445
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1237200971933698 7.1856e-08  
a 2.561100156049368 2.1051e-08 au
q 2.244240595820986 1.916e-07 au
i 1.925119635747207 7.0753e-06 deg
node 184.531356449744 0.00015483 deg
peri 173.2885045726399 0.00015637 deg
M 219.030483906275 2.318e-05 deg
tp 2459586.720469494217
(2022-Jan-07.22046949)
0.00010016 TDB
period 1497.056774158227
4.10
1.8458e-05
5.054e-08
d
yr
n .2404718419596497 2.9648e-09 deg/d
Q 2.877959716277751 2.3655e-08 au
  Orbit Determination Parameters
   # obs. used (total)      166  
   data-arc span      5321 days (14.57 yr)  
   first obs. used      2005-09-24  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57225  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-22 02:38:28  

Additional Information
 Earth MOID = 1.24022 au 
 Jupiter MOID = 2.55849 au 
 T_jup = 3.423 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457228.5 (2015-Jul-25.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .121970767639321 7.1698e-08  
q 2.251266091101874 1.9087e-07 au
tp 2456589.982204566255
(2013-Oct-24.48220457)
8.7938e-05 TDB
node 184.5464537439666 0.00015508 deg
peri 173.1643089797075 0.00015667 deg
i 1.921783310347073 7.0728e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      166  
   data-arc span      5321 days (14.57 yr)  
   first obs. used      2005-09-24  
   last obs. used      2020-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57225  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-22 02:38:28  

Additional Information
 Jupiter MOID = 2.55849 au 
 T_jup = 3.423 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.140616850880354E-15 -1.362906754254439E-14 -2.082331846992007E-12 -7.702646085182713E-14 -4.093032662412338E-13 9.763265019749019E-17
q -1.362906754254439E-14 3.64322462196863E-14 5.650247258372611E-12 2.045981720438762E-13 1.146534345225248E-12 -2.595555659227442E-16
tp -2.082331846992007E-12 5.650247258372611E-12 7.733088438680885E-9 4.38849820025766E-11 1.970059683975171E-9 -3.190356981062991E-13
node -7.702646085182713E-14 2.045981720438762E-13 4.38849820025766E-11 2.405046842769913E-8 -2.402601435002509E-8 -3.894639453400692E-10
peri -4.093032662412338E-13 1.146534345225248E-12 1.970059683975171E-9 -2.402601435002509E-8 2.454482415745128E-8 3.891872301440201E-10
i 9.763265019749019E-17 -2.595555659227442E-16 -3.190356981062991E-13 -3.894639453400692E-10 3.891872301440201E-10 5.002446678931836E-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 17.5   n/a MPO427995  

423445 (2005 ST39)          Discovered 2005-Sep-24 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-02-04
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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