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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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07405079473672628 3.2299e-08  
a 2.375850928192129 9.6358e-09 au
q 2.199917278783513 7.5848e-08 au
i 7.537501833144637 3.5325e-06 deg
node 136.9621272177175 2.9057e-05 deg
peri 339.8194504768219 3.8936e-05 deg
M 187.8737633869662 2.6026e-05 deg
tp 2459840.045990843668
(2022-Sep-17.54599084)
9.7184e-05 TDB
period 1337.602920008805
3.66
8.1374e-06
2.228e-08
d
yr
n .2691381684466047 1.6373e-09 deg/d
Q 2.551784577600746 1.0349e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1040  
   data-arc span      25666 days (70.27 yr)  
   first obs. used      1950-05-10  
   last obs. used      2020-08-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52202  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:10:44  

Additional Information
 Earth MOID = 1.21732 au 
 Jupiter MOID = 2.49359 au 
 T_jup = 3.526 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457022.5 (2014-Dec-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07475436127381889 3.241e-08  
q 2.196619476468994 7.6215e-08 au
tp 2457166.784697361025
(2015-May-24.28469736)
9.4834e-05 TDB
node 137.0027286076396 2.9076e-05 deg
peri 339.8953367998974 3.8731e-05 deg
i 7.535870015285446 3.5326e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1040  
   data-arc span      25666 days (70.27 yr)  
   first obs. used      1950-05-10  
   last obs. used      2020-08-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52202  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:10:44  

Additional Information
 Jupiter MOID = 2.49359 au 
 T_jup = 3.526 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.050399927920272E-15 -2.453728858916822E-15 -4.200907763108358E-13 -2.879826098437144E-15 -1.188654526960834E-13 -1.737003734584103E-16
q -2.453728858916822E-15 5.808800809102794E-15 9.775149125967425E-13 6.446755948315297E-15 2.745582410527511E-13 5.585077600315556E-16
tp -4.200907763108358E-13 9.775149125967425E-13 8.993544022270845E-9 7.988696178908064E-12 2.440352363870802E-9 -1.241021682269146E-12
node -2.879826098437144E-15 6.446755948315297E-15 7.988696178908064E-12 8.454246061237947E-10 -8.358426037904595E-10 -5.895475923513456E-12
peri -1.188654526960834E-13 2.745582410527511E-13 2.440352363870802E-9 -8.358426037904595E-10 1.500067367420538E-9 5.511209257351521E-12
i -1.737003734584103E-16 5.585077600315556E-16 -1.241021682269146E-12 -5.895475923513456E-12 5.511209257351521E-12 1.247900181242808E-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 15.50   n/a MPCxxxxx  
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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