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74791 (1999 SW6)
Classification: Main-belt Asteroid          SPK-ID: 2074791
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 .2261881782898706 4.3705e-08  
a 2.41104942215267 1.0414e-08 au
q 1.865698545589113 1.0405e-07 au
i 1.484825061403784 4.3804e-06 deg
node 218.8645766221452 0.00014851 deg
peri 125.3828932085868 0.00014876 deg
M 206.5861435969068 1.0871e-05 deg
tp 2459583.233093212175
(2022-Jan-03.73309321)
4.3632e-05 TDB
period 1367.437847368742
3.74
8.8591e-06
2.425e-08
d
yr
n .2632660787418755 1.7056e-09 deg/d
Q 2.956400298716228 1.2769e-08 au
  Orbit Determination Parameters
   # obs. used (total)      757  
   data-arc span      8452 days (23.14 yr)  
   first obs. used      1996-12-13  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52168  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:22:10  

Additional Information
 Earth MOID = .858653 au 
 Jupiter MOID = 2.46186 au 
 T_jup = 3.484 
[ 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 15.9   n/a MPO412636  
rotation period rot_per 6.81 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:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

74791 (1999 SW6)          Discovered 1999-Sep-30 by Stafford, T. at Zeno
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 SW6 = 2002 JA56 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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