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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2038273469439628 1.694e-08  
a 2.606049052870788 1.0304e-08 au
q 2.074864988418308 4.6783e-08 au
i 16.84299167345602 9.4105e-07 deg
node 187.2566890884324 1.4984e-06 deg
peri 60.95756116222 5.7459e-06 deg
M 273.0035899763595 7.7817e-06 deg
tp 2459571.839490032794
(2021-Dec-23.33949003)
3.4413e-05 TDB
period 1536.640608221407
4.21
9.1134e-06
2.495e-08
d
yr
n .2342772916932632 1.3894e-09 deg/d
Q 3.137233117323268 1.2404e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2091  
   data-arc span      17689 days (48.43 yr)  
   first obs. used      1972-10-09  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44222  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 19:41:58  

Additional Information
 Earth MOID = 1.11666 au 
 Jupiter MOID = 2.00393 au 
 T_jup = 3.323 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.58   n/a E2021B10  
diameter diameter 5.740 km 0.125 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 96.5 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.; 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] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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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