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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07441189790031733 3.2401e-08  
a 2.374810912088609 9.5688e-09 au
q 2.198096724965712 7.6165e-08 au
i 7.535062493023711 3.5509e-06 deg
node 136.9750095387643 2.9402e-05 deg
peri 339.4198113449536 3.9309e-05 deg
M 134.4607115130677 2.6126e-05 deg
tp 2458501.230673914700
(2019-Jan-17.73067391)
9.6763e-05 TDB
period 1336.724723290193
3.66
8.0791e-06
2.212e-08
d
yr
n .2693149858961998 1.6277e-09 deg/d
Q 2.551525099211506 1.0281e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1024  
   data-arc span      25633 days (70.18 yr)  
   first obs. used      1950-05-10  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52515  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:10:23  

Additional Information
 Earth MOID = 1.21568 au 
 Jupiter MOID = 2.49562 au 
 T_jup = 3.527 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456977.5 (2014-Nov-16.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07472395769356388 3.2442e-08  
q 2.196627826405875 7.6333e-08 au
tp 2457166.808523158088
(2015-May-24.30852316)
9.6041e-05 TDB
node 137.0030358004885 2.9398e-05 deg
peri 339.9014971700974 3.9206e-05 deg
i 7.535856359565436 3.5518e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1024  
   data-arc span      25633 days (70.18 yr)  
   first obs. used      1950-05-10  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52515  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:10:23  

Additional Information
 Jupiter MOID = 2.49562 au 
 T_jup = 3.527 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.05245955697441E-15 -2.4596304875887E-15 -4.030610284950486E-13 -2.732764351096235E-15 -1.139662619018645E-13 -1.742218994549727E-16
q -2.4596304875887E-15 5.826666096291687E-15 9.301618675631796E-13 6.121548818517293E-15 2.605342831335039E-13 5.67539243048125E-16
tp -4.030610284950486E-13 9.301618675631796E-13 9.223791867579234E-9 7.903549416982453E-12 2.505540096348725E-9 -1.320105220830515E-12
node -2.732764351096235E-15 6.121548818517293E-15 7.903549416982453E-12 8.642235998388432E-10 -8.545002542241332E-10 -4.380031194220369E-12
peri -1.139662619018645E-13 2.605342831335039E-13 2.505540096348725E-9 -8.545002542241332E-10 1.537110761262526E-9 3.985802503461419E-12
i -1.742218994549727E-16 5.67539243048125E-16 -1.320105220830515E-12 -4.380031194220369E-12 3.985802503461419E-12 1.261553773053707E-11

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

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