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JPL Small-Body Database Browser
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7429 Hoshikawa (1992 YB1)
Classification: Main-belt Asteroid          SPK-ID: 2007429
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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02875257275439982 4.0978e-08  
a 2.858914466660117 1.3298e-08 au
q 2.776713320458866 1.1551e-07 au
i 1.598178348280459 4.9283e-06 deg
node 354.1517736031182 0.00013264 deg
peri 230.1544793078466 0.00015504 deg
M 127.534881980998 8.0963e-05 deg
tp 2458375.000950425151
0.0003973 TDB
period 1765.631914572956
n .2038930068202076 1.4225e-09 deg/d
Q 2.941115612861368 1.368e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2085  
   data-arc span      29189 days (79.92 yr)  
   first obs. used      1940-01-13  
   last obs. used      2019-12-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51276  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:29:25  

Additional Information
 Earth MOID = 1.76731 au 
 Jupiter MOID = 2.02735 au 
 T_jup = 3.301 
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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 12.6   n/a MPO350862  
diameter diameter 7.781 km 0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 20. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2015) Observatoire de Geneve web site,]
geometric albedo albedo 0.320   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

7429 Hoshikawa           Discovered 1992 Dec. 24 by T. Hioki and S. Hayakawa at Okutama.
Hoshikawa, or "Star River", flows between Kumagaya and Gyoda, in Saitama prefecture. There are many carp in the river, and on its banks events such as the Uchiwa Fan Festival and Daruma Ichi Market are held.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990928/MPCPages.arcLast Updated: 2010-06-11

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Alternate Designations
 1992 YB1 = 1940 AE = 1981 SH4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2020-May-26 18:16 UT
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