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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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07441189707083587 3.2648e-08  
a 2.374810912777997 9.9268e-09 au
q 2.198096727573663 7.7096e-08 au
i 7.535061686462809 3.6709e-06 deg
node 136.9750039348962 3.0064e-05 deg
peri 339.4198144061331 4.065e-05 deg
M 134.4607135338804 2.6985e-05 deg
tp 2458501.230666193771
(2019-Jan-17.73066619)
0.00010017 TDB
period 1336.724723872253
3.66
8.3814e-06
2.295e-08
d
yr
n .26931498577893 1.6886e-09 deg/d
Q 2.551525097982331 1.0665e-08 au
  Orbit Determination Parameters
   # obs. used (total)      992  
   data-arc span      25600 days (70.09 yr)  
   first obs. used      1950-05-10  
   last obs. used      2020-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53081  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 23:48:13  

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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