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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1237201452939411 7.25e-08  
a 2.561100144891296 2.1246e-08 au
q 2.244240462853011 1.9288e-07 au
i 1.925117205936913 7.2722e-06 deg
node 184.5312335939924 0.00016465 deg
peri 173.2885956089403 0.00016633 deg
M 219.0305145454531 2.419e-05 deg
tp 2459586.720338250447
(2022-Jan-07.22033825)
0.00010394 TDB
period 1497.056764374774
4.10
1.8629e-05
5.1e-08
d
yr
n .2404718435311632 2.9923e-09 deg/d
Q 2.877959826929581 2.3875e-08 au
  Orbit Determination Parameters
   # obs. used (total)      158  
   data-arc span      4829 days (13.22 yr)  
   first obs. used      2005-09-24  
   last obs. used      2018-12-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59709  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 04:37:52  

Additional Information
 Earth MOID = 1.24022 au 
 Jupiter MOID = 2.55849 au 
 T_jup = 3.423 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457116.5 (2015-Apr-04.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1217799873261053 7.2293e-08  
q 2.251687625929373 1.9189e-07 au
tp 2456589.284876642438
(2013-Oct-23.78487664)
9.4386e-05 TDB
node 184.5822749719232 0.00016514 deg
peri 172.9966664902691 0.00016688 deg
i 1.920277841881955 7.2666e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      158  
   data-arc span      4829 days (13.22 yr)  
   first obs. used      2005-09-24  
   last obs. used      2018-12-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59709  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 04:37:52  

Additional Information
 Jupiter MOID = 2.55849 au 
 T_jup = 3.423 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.226333458391516E-15 -1.38134685041564E-14 -2.414021438151673E-12 -8.154864865106809E-14 -4.966295024245493E-13 2.262587469329345E-16
q -1.38134685041564E-14 3.682047100133979E-14 6.430509548831704E-12 2.187610858161901E-13 1.348993818056055E-12 -6.961115414162518E-16
tp -2.414021438151673E-12 6.430509548831704E-12 8.908771336106165E-9 5.482669254724717E-11 2.288720739302903E-9 -3.365824745846012E-13
node -8.154864865106809E-14 2.187610858161901E-13 5.482669254724717E-11 2.727075793246703E-8 -2.724154054382706E-8 -4.845225697561889E-10
peri -4.966295024245493E-13 1.348993818056055E-12 2.288720739302903E-9 -2.724154054382706E-8 2.78481622211381E-8 4.841720234300118E-10
i 2.262587469329345E-16 -6.961115414162518E-16 -3.365824745846012E-13 -4.845225697561889E-10 4.841720234300118E-10 5.280381591436539E-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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