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74056 (1998 KM9)
Classification: Main-belt Asteroid          SPK-ID: 2074056
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07441189798493524 3.2375e-08  
a 2.374810911965727 9.507e-09 au
q 2.198096724651023 7.6054e-08 au
i 7.53506264249909 3.5328e-06 deg
node 136.9750110587054 2.9177e-05 deg
peri 339.4198101016266 3.8969e-05 deg
M 134.4607113089427 2.5956e-05 deg
tp 2458501.230674711393
(2019-Jan-17.73067471)
9.6088e-05 TDB
period 1336.724723186442
3.66
8.0269e-06
2.198e-08
d
yr
n .2693149859171029 1.6172e-09 deg/d
Q 2.551525099280432 1.0214e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1028  
   data-arc span      25666 days (70.27 yr)  
   first obs. used      1950-05-10  
   last obs. used      2020-08-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52468  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:45:13  

Additional Information
 Earth MOID = 1.21568 au 
 Jupiter MOID = 2.49562 au 
 T_jup = 3.527 
[ 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 15.5   n/a MPO474626  
diameter diameter 2.418 km 0.754 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 17.4 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:
[Galad, A.; Kornos, L. (2008) Minor Planet Bull. 35, 144-146.]
geometric albedo albedo 0.276   0.098 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

74056 (1998 KM9)          Discovered 1998-May-28 by Comba, P. G. at Prescott
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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