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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1087754090928482 8.453e-08  
a 3.0017550703915 2.6259e-08 au
q 2.675237934613134 2.5706e-07 au
i 8.727620427603977 5.9157e-06 deg
node 262.2775666973864 4.6737e-05 deg
peri 65.14688962989028 5.8502e-05 deg
M 11.40061695556105 3.6677e-05 deg
tp 2458940.342862922064
(2020-Mar-31.84286292)
0.00019353 TDB
period 1899.596261542066
5.20
2.4926e-05
6.824e-08
d
yr
n .1895139547746619 2.4868e-09 deg/d
Q 3.328272206169867 2.9116e-08 au
  Orbit Determination Parameters
   # obs. used (total)      469  
   data-arc span      9488 days (25.98 yr)  
   first obs. used      1994-09-30  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50246  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 20:15:10  

Additional Information
 Earth MOID = 1.67794 au 
 Jupiter MOID = 1.98481 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 15.0   n/a MPO436582  
rotation period rot_per 78.268 h n/a LCDB (Rev. 2019-August); 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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