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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .104627060077182 3.2956e-08  
a 2.260560405785115 7.8855e-09 au
q 2.024044616400936 7.464e-08 au
i 6.232499512084266 3.6974e-06 deg
node 236.64555388 3.7251e-05 deg
peri 154.309222739616 4.2536e-05 deg
M 178.2860142071902 2.1058e-05 deg
tp 2458585.695019724183
(2019-Apr-12.19501972)
7.1515e-05 TDB
period 1241.431044849552
3.40
6.4957e-06
1.778e-08
d
yr
n .2899879147485215 1.5173e-09 deg/d
Q 2.497076195169293 8.7105e-09 au
  Orbit Determination Parameters
   # obs. used (total)      805  
   data-arc span      7898 days (21.62 yr)  
   first obs. used      1998-09-26  
   last obs. used      2020-05-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51542  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:08:47  

Additional Information
 Earth MOID = 1.03096 au 
 Jupiter MOID = 2.89074 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 16.05   n/a E2021B55  
rotation period rot_per 10.7 h n/a LCDB (Rev. 2020-October); 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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