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4771 Hayashi (1989 RM2)
Classification: Main-belt Asteroid          SPK-ID: 2004771
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .155556894753272 3.642e-08  
a 2.684417915234335 1.1862e-08 au
q 2.26683820012043 1.0293e-07 au
i 4.801091220412309 4.0916e-06 deg
node 288.9414490469748 4.2748e-05 deg
peri 43.80210407312232 4.4865e-05 deg
M 9.142754600636732 1.5245e-05 deg
tp 2458959.701125553095
(2020-Apr-20.20112555)
6.789e-05 TDB
period 1606.4736988416
4.40
1.0648e-05
2.915e-08
d
yr
n .224093304645815 1.4853e-09 deg/d
Q 3.101997630348241 1.3707e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2000  
   data-arc span      18996 days (52.01 yr)  
   first obs. used      1967-09-12  
   last obs. used      2019-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47765  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 00:47:35  

Additional Information
 Earth MOID = 1.25917 au 
 Jupiter MOID = 2.25537 au 
 T_jup = 3.352 
[ show covariance matrix ]

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 12.7   n/a MPO492807  
diameter diameter 13.471 km 0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 9.801 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Galad, A. (2008) Minor Planet Bull. 35, 128-131.]
geometric albedo albedo 0.098   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4771 Hayashi (1989 RM2)          Discovered 1989-Sep-07 by Yanai and Watanabe at Kitami
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1989 RM2 = 1967 RD1 = 1979 FQ = 1980 RA3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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