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74242 (1998 SY54)
Classification: Main-belt Asteroid          SPK-ID: 2074242
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2224816847544768 5.607e-08  
a 2.600081115761379 8.8471e-09 au
q 2.021610688628487 1.4651e-07 au
i 9.623118049342814 6.6495e-06 deg
node 6.59251383540378 1.953e-05 deg
peri 20.1517337085476 2.2767e-05 deg
M 45.53443452459184 8.4452e-06 deg
tp 2458806.805977100882
(2019-Nov-19.30597710)
3.6071e-05 TDB
period 1531.365195850261
4.19
7.816e-06
2.14e-08
d
yr
n .2350843554336606 1.1999e-09 deg/d
Q 3.17855154289427 1.0815e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1116  
   data-arc span      10436 days (28.57 yr)  
   first obs. used      1992-03-26  
   last obs. used      2020-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49088  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:44:26  

Additional Information
 Earth MOID = 1.02822 au 
 Jupiter MOID = 2.2998 au 
 T_jup = 3.360 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457223.5 (2015-Jul-20.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2231928726439387 5.67e-08  
q 2.019337861481765 1.4841e-07 au
tp 2457270.832500665516
(2015-Sep-05.33250067)
3.7353e-05 TDB
node 6.716926325130159 1.9442e-05 deg
peri 19.20388141679493 2.2649e-05 deg
i 9.649299167877315 6.6599e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1116  
   data-arc span      10436 days (28.57 yr)  
   first obs. used      1992-03-26  
   last obs. used      2020-10-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49088  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:44:26  

Additional Information
 Jupiter MOID = 2.2998 au 
 T_jup = 3.360 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.214907441137746E-15 -8.406609402014568E-15 -7.700751031544258E-13 1.935055870298986E-14 -2.60988764221527E-13 -1.320808633814473E-14
q -8.406609402014568E-15 2.202672120716973E-14 1.931354516251229E-12 -5.176244860112127E-14 6.606744932975892E-13 3.525691326155918E-14
tp -7.700751031544258E-13 1.931354516251229E-12 1.39523192146577E-9 -6.81290424314952E-12 4.391541671911489E-10 1.411451690047773E-12
node 1.935055870298986E-14 -5.176244860112127E-14 -6.81290424314952E-12 3.779867515108814E-10 -3.740187023942606E-10 3.123555892391352E-11
peri -2.60988764221527E-13 6.606744932975892E-13 4.391541671911489E-10 -3.740187023942606E-10 5.12959163964495E-10 -3.048183295987552E-11
i -1.320808633814473E-14 3.525691326155918E-14 1.411451690047773E-12 3.123555892391352E-11 -3.048183295987552E-11 4.435391505423161E-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 15.0   n/a MPO406554  

74242 (1998 SY54)          Discovered 1998-Sep-16 by LONEOS at Anderson Mesa
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 SY54 = 2000 EJ35 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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