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120928 (1998 SP109)
Classification: Main-belt Asteroid          SPK-ID: 2120928
[ 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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1044800960719409 3.2951e-08  
a 2.260909805667267 7.8917e-09 au
q 2.024689731961158 7.4641e-08 au
i 6.232138158571747 3.6979e-06 deg
node 236.6504596295595 3.7252e-05 deg
peri 154.3537204886015 4.2552e-05 deg
M 120.2446453960811 2.0982e-05 deg
tp 2458585.749872540987
(2019-Apr-12.24987254)		 7.1643e-05 TDB
period 1241.718875659065
3.40		 6.5013e-06
1.78e-08		 d
yr
n .2899206954625083 1.518e-09 deg/d
Q 2.497129879373376 8.7162e-09 au
   Orbit Determination Parameters
   # obs. used (total)      804  
   data-arc span      7879 days (21.57 yr)  
   first obs. used      1998-09-26  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51184  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:41:25  

Additional Information
 Earth MOID = 1.03275 au 
 Jupiter MOID = 2.88989 au 
 T_jup = 3.605 
[ 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 16.0   n/a MPO348205  
rotation period rot_per 10.7 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Galad, A.; Kornos, L.; Vilagi, J. (2010) Minor Planet Bull. 37, 9-15.]

120928 (1998 SP109)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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