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152717 (1998 SY157)
Classification: Main-belt Asteroid          SPK-ID: 2152717
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2372713098099489 2.7279e-08  
a 2.260932593019646 9.1378e-09 au
q 1.72447815528187 6.4586e-08 au
i 2.625211437308888 3.6655e-06 deg
node 163.412352875914 8.7592e-05 deg
peri 141.1453550000255 8.8391e-05 deg
M 234.0988582533116 1.0726e-05 deg
tp 2459634.767187988004
(2022-Feb-24.26718799)
3.7467e-05 TDB
period 1241.73764833863
3.40
7.5279e-06
2.061e-08
d
yr
n .2899163124204683 1.7576e-09 deg/d
Q 2.797387030757422 1.1306e-08 au
  Orbit Determination Parameters
   # obs. used (total)      385  
   data-arc span      8207 days (22.47 yr)  
   first obs. used      1998-09-25  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57329  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 19:28:20  

Additional Information
 Earth MOID = .708387 au 
 Jupiter MOID = 2.45648 au 
 T_jup = 3.581 
[ 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 17.1   n/a MPO449824  

152717 (1998 SY157)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04

[ show close-approach data ]
Alternate Designations
 1998 SY157 = 2001 KA12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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