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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07405079564766025 3.2299e-08  
a 2.375850925562461 9.656e-09 au
q 2.199917274184331 7.5849e-08 au
i 7.537501830371923 3.5336e-06 deg
node 136.9621270713099 2.9152e-05 deg
peri 339.8194502115272 3.9069e-05 deg
M 187.8737641810609 2.6154e-05 deg
tp 2459840.045986831353
(2022-Sep-17.54598683)
9.7683e-05 TDB
period 1337.602917788052
3.66
8.1545e-06
2.233e-08
d
yr
n .2691381688934408 1.6408e-09 deg/d
Q 2.551784576940591 1.0371e-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 = 1.21732 au 
 Jupiter MOID = 2.49359 au 
 T_jup = 3.526 
[ 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 15.49   n/a E2021B10  
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. 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:
[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

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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