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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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3286697263650307 3.2617e-08  
a 3.071603022294101 1.9024e-08 au
q 2.062060097454698 1.0063e-07 au
i 1.98369564563604 4.1796e-06 deg
node 135.4789342100692 0.00016113 deg
peri 197.4441056811318 0.00016131 deg
M 353.6153970791649 8.6334e-06 deg
tp 2459035.372047511791
(2020-Jul-04.87204751)
4.7314e-05 TDB
period 1966.283143980218
5.38
1.8267e-05
5.001e-08
d
yr
n .183086551447151 1.7009e-09 deg/d
Q 4.081145947133505 2.5277e-08 au
  Orbit Determination Parameters
   # obs. used (total)      447  
   data-arc span      7544 days (20.65 yr)  
   first obs. used      1999-12-07  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5871  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 11:58:43  

Additional Information
 Earth MOID = 1.05193 au 
 Jupiter MOID = 1.30853 au 
 T_jup = 3.144 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457031.5 (2015-Jan-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3299044959509159 3.2543e-08  
q 2.056907057339536 1.0048e-07 au
tp 2457073.811812445490
(2015-Feb-20.31181245)
4.2206e-05 TDB
node 135.5339236713279 0.00016129 deg
peri 197.8138922660333 0.00016147 deg
i 1.983292273312493 4.1793e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      447  
   data-arc span      7544 days (20.65 yr)  
   first obs. used      1999-12-07  
   last obs. used      2020-08-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5871  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 11:58:43  

Additional Information
 Jupiter MOID = 1.30853 au 
 T_jup = 3.144 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.05907833906087E-15 -3.244450869945031E-15 1.633752885951329E-13 -5.92189297627185E-15 5.162184398469742E-14 1.157622800538562E-16
q -3.244450869945031E-15 1.009717603077933E-14 -4.665337616498552E-13 1.635343963665122E-14 -1.532249362306386E-13 -2.355671288240436E-16
tp 1.633752885951329E-13 -4.665337616498552E-13 1.781330049526719E-9 1.599172294316603E-12 3.729090137924902E-10 3.813837772687458E-13
node -5.92189297627185E-15 1.635343963665122E-14 1.599172294316603E-12 2.601303619193653E-8 -2.599679459811693E-8 -7.42724640358587E-11
peri 5.162184398469742E-14 -1.532249362306386E-13 3.729090137924902E-10 -2.599679459811693E-8 2.607112360604199E-8 7.430313715559747E-11
i 1.157622800538562E-16 -2.355671288240436E-16 3.813837772687458E-13 -7.42724640358587E-11 7.430313715559747E-11 1.746634019206478E-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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