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101173 (1998 SY4)
Classification: Main-belt Asteroid          SPK-ID: 2101173
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .217872254561849 4.5173e-08  
a 2.46349053935866 1.158e-08 au
q 1.926764301456803 1.1514e-07 au
i 2.992406728872494 4.4351e-06 deg
node 114.3588059540453 9.2233e-05 deg
peri 238.5924967738282 9.2927e-05 deg
M 227.7597862755966 1.5181e-05 deg
tp 2459519.283096136771
(2021-Oct-31.78309614)
6.1827e-05 TDB
period 1412.292897518
3.87
9.9578e-06
2.726e-08
d
yr
n .2549046310667378 1.7973e-09 deg/d
Q 3.000216777260516 1.4103e-08 au
  Orbit Determination Parameters
   # obs. used (total)      490  
   data-arc span      7923 days (21.69 yr)  
   first obs. used      1998-09-15  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56981  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:02:01  

Additional Information
 Earth MOID = .923458 au 
 Jupiter MOID = 2.43821 au 
 T_jup = 3.453 
[ show covariance matrix ]

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 16.1   n/a MPO432539  

101173 (1998 SY4)          Discovered 1998-Sep-17 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 SY4 = 2002 TM258 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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