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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07472351156332452 3.2848e-08  
a 2.374166590198089 1.0191e-08 au
q 2.196760525542164 7.784e-08 au
i 7.534730271777135 3.7152e-06 deg
node 136.9827847747695 3.0288e-05 deg
peri 339.1971797596297 4.0955e-05 deg
M 26.8941970406297 2.7145e-05 deg
tp 2458500.679143415119
(2019-Jan-17.17914342)
0.00010076 TDB
period 1336.180749931618
3.66
8.6029e-06
2.355e-08
d
yr
n .2694246268840678 1.7347e-09 deg/d
Q 2.551572654854015 1.0952e-08 au
  Orbit Determination Parameters
   # obs. used (total)      971  
   data-arc span      25194 days (68.98 yr)  
   first obs. used      1950-05-10  
   last obs. used      2019-05-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53276  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:20:51  

Additional Information
 Earth MOID = 1.21472 au 
 Jupiter MOID = 2.49778 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 15.4   n/a MPO426449  
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-January); 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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