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154923 (2004 SK39)
Classification: Main-belt Asteroid          SPK-ID: 2154923
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .328669728853364 3.2999e-08  
a 3.071603009785862 2.7534e-08 au
q 2.062060081414366 1.0452e-07 au
i 1.983696613721538 4.2612e-06 deg
node 135.4788419011332 0.00017943 deg
peri 197.4441935080462 0.00017969 deg
M 353.6154039812428 1.3854e-05 deg
tp 2459035.372009600339
(2020-Jul-04.87200960)
7.6033e-05 TDB
period 1966.283131969515
5.38
2.6439e-05
7.239e-08
d
yr
n .1830865525655038 2.4618e-09 deg/d
Q 4.081145938157357 3.6584e-08 au
  Orbit Determination Parameters
   # obs. used (total)      421  
   data-arc span      7111 days (19.47 yr)  
   first obs. used      1999-12-07  
   last obs. used      2019-05-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59448  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 09:35:27  

Additional Information
 Earth MOID = 1.05193 au 
 Jupiter MOID = 1.30853 au 
 T_jup = 3.144 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456843.5 (2014-Jul-05.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3299098531259449 3.2887e-08  
q 2.056773413655223 1.0396e-07 au
tp 2457073.851144859849
(2015-Feb-20.35114486)
5.9128e-05 TDB
node 135.5356429418915 0.00017962 deg
peri 197.8291946108679 0.00017987 deg
i 1.983209811785429 4.2607e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      421  
   data-arc span      7111 days (19.47 yr)  
   first obs. used      1999-12-07  
   last obs. used      2019-05-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59448  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 09:35:27  

Additional Information
 Jupiter MOID = 1.30853 au 
 T_jup = 3.144 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.08154778989542E-15 -3.369202390499151E-15 -1.716708730237238E-14 -3.597222325644892E-15 1.949182684310591E-14 3.483695176683029E-17
q -3.369202390499151E-15 1.080857979531925E-14 6.059981600093699E-13 1.334687834880029E-14 2.740499231231372E-14 1.699954801049326E-16
tp -1.716708730237238E-14 6.059981600093699E-13 3.496061816834539E-9 1.754686948724912E-11 6.417660684554462E-10 8.860195283517939E-13
node -3.597222325644892E-15 1.334687834880029E-14 1.754686948724912E-11 3.226238437567709E-8 -3.223964100566093E-8 -1.369197515991567E-10
peri 1.949182684310591E-14 2.740499231231372E-14 6.417660684554462E-10 -3.223964100566093E-8 3.235478053680351E-8 1.369956337768583E-10
i 3.483695176683029E-17 1.699954801049326E-16 8.860195283517939E-13 -1.369197515991567E-10 1.369956337768583E-10 1.815338128447758E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5   n/a MPO439923  

154923 (2004 SK39)          Discovered 2004-Sep-17 by LINEAR at Socorro
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04

[ show close-approach data ]
Alternate Designations
 2004 SK39 = 1999 XL61 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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