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4773 Hayakawa (1989 WF)
Classification: Main-belt Asteroid          SPK-ID: 2004773
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 .116836311640938 1.5052e-08  
a 2.609216512052166 9.1399e-09 au
q 2.304365278511358 4.0184e-08 au
i 5.017524735643808 6.4104e-07 deg
node 60.17981875075565 8.8534e-06 deg
peri 62.03475325807754 1.0424e-05 deg
M 74.71549274131337 9.0643e-06 deg
tp 2458880.999333565792
(2020-Feb-01.49933357)
3.8874e-05 TDB
period 1539.442968201364
4.21
8.0889e-06
2.215e-08
d
yr
n .2338508197030595 1.2287e-09 deg/d
Q 2.914067745592975 1.0208e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3147  
   data-arc span      18606 days (50.94 yr)  
   first obs. used      1970-04-13  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39333  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:50:33  

Additional Information
 Earth MOID = 1.32524 au 
 Jupiter MOID = 2.16031 au 
 T_jup = 3.395 
[ 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 13.08   n/a MPCxxxxx  
diameter diameter 6.235 km 0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.2401 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hamanowa, H.; Hamanowa, H. (2011) http://www2.ocn.ne.jp/~hamaten/astlcdata.htm]
geometric albedo albedo 0.378   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4773 Hayakawa (1989 WF)          Discovered 1989-Nov-17 by Endate and Watanabe at Kitami
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1989 WF = 1970 GH2 = 1974 FF1 = 1987 HV1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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