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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2179567806297114 4.3851e-08  
a 2.463629161540917 1.131e-08 au
q 1.926664480825984 1.1161e-07 au
i 2.99242881819246 4.4345e-06 deg
node 114.3584561293644 8.9732e-05 deg
peri 238.5694239334526 9.0451e-05 deg
M 278.7762256668278 1.5337e-05 deg
tp 2459519.170672478479
(2021-Oct-31.67067248)
6.1544e-05 TDB
period 1412.412105126708
3.87
9.726e-06
2.663e-08
d
yr
n .2548831171109968 1.7551e-09 deg/d
Q 3.000593842255851 1.3775e-08 au
  Orbit Determination Parameters
   # obs. used (total)      493  
   data-arc span      7923 days (21.69 yr)  
   first obs. used      1998-09-15  
   last obs. used      2020-05-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56803  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:35:32  

Additional Information
 Earth MOID = .921625 au 
 Jupiter MOID = 2.4385 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 16.17   n/a E2021B55  

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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