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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2039302056403881 3.3943e-08  
a 2.606082104141665 1.155e-08 au
q 2.074623244728321 8.9832e-08 au
i 16.84210664434715 4.2448e-06 deg
node 187.2658037215515 1.1554e-05 deg
peri 60.93263437214102 1.5301e-05 deg
M 226.1797819423492 1.1773e-05 deg
tp 2459571.715258913995
(2021-Dec-23.21525891)
5.2358e-05 TDB
period 1536.669841028416
4.21
1.0216e-05
2.797e-08
d
yr
n .2342728349240394 1.5575e-09 deg/d
Q 3.13754096355501 1.3906e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1798  
   data-arc span      17545 days (48.04 yr)  
   first obs. used      1972-10-09  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45109  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:28:17  

Additional Information
 Earth MOID = 1.1176 au 
 Jupiter MOID = 2.00468 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 13.5   n/a MPO319178  
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. 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] (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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