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7421 Kusaka (1992 HL)
Classification: Main-belt Asteroid          SPK-ID: 2007421
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2039302068683088 3.4014e-08  
a 2.606082104407065 1.1561e-08 au
q 2.074623241739535 8.999e-08 au
i 16.84210682513802 4.2723e-06 deg
node 187.26580377 1.1563e-05 deg
peri 60.93263400891341 1.5327e-05 deg
M 226.1797821125612 1.1786e-05 deg
tp 2459571.715258274698
5.2406e-05 TDB
period 1536.669841263155
n .2342728348882524 1.5589e-09 deg/d
Q 3.137540967074596 1.3919e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1755  
   data-arc span      17281 days (47.31 yr)  
   first obs. used      1972-10-09  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4502  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:29:02  

Additional Information
 Earth MOID = 1.1176 au 
 Jupiter MOID = 2.00468 au 
 T_jup = 3.323 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.5   n/a MPO319178  
diameter diameter 5.740 km 0.125 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 96.5 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.; Vilagi, J. (2010) Minor Planet Bull. 37, 9-15.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.257   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

7421 Kusaka           Discovered 1992 Apr. 30 by Y. Kushida and O. Muramatsu at Yatsugatake.
Hideaki Kusaka (1924-1991) was an amateur astronomer who wrote several books on mythology related to constellations and calendars. He worked for a publisher and for the Gotoh Planetarium and Astronomical Museum in Tokyo before appearing frequently on science programs on radio and television.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020526/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1992 HL = 1972 TP9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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