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120540 (1994 SK13)
Classification: Main-belt Asteroid          SPK-ID: 2120540
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1086082570415118 8.4044e-08  
a 3.001382655906652 2.1766e-08 au
q 2.675407716934007 2.5593e-07 au
i 8.727625200899597 4.5544e-06 deg
node 262.2766726849666 4.5625e-05 deg
peri 65.18421183329939 5.621e-05 deg
M 49.28681457677553 3.2149e-05 deg
tp 2458940.478817264501
(2020-Mar-31.97881726)
0.00017063 TDB
period 1899.242760738053
5.20
2.066e-05
5.656e-08
d
yr
n .1895492284830944 2.0619e-09 deg/d
Q 3.327357594879297 2.413e-08 au
  Orbit Determination Parameters
   # obs. used (total)      641  
   data-arc span      9600 days (26.28 yr)  
   first obs. used      1994-09-30  
   last obs. used      2021-01-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48431  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 09:25:18  

Additional Information
 Earth MOID = 1.67621 au 
 Jupiter MOID = 1.98502 au 
 T_jup = 3.226 
[ 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 15.12   n/a E2021B55  
rotation period rot_per 78.268 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

120540 (1994 SK13)          Discovered 1994-Sep-30 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1994 SK13 = 1999 RY226 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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