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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1555569169681137 2.6806e-08  
a 2.684417916041209 8.5867e-09 au
q 2.26683814116787 7.247e-08 au
i 4.801095635737616 3.2465e-06 deg
node 288.9414690157793 4.2154e-05 deg
peri 43.80210335038022 4.3876e-05 deg
M 9.142738107107203 1.1885e-05 deg
tp 2458959.701199135870
(2020-Apr-20.20119914)
5.3007e-05 TDB
period 1606.473699565904
4.40
7.708e-06
2.11e-08
d
yr
n .2240933045447791 1.0752e-09 deg/d
Q 3.101997690914548 9.9225e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2418  
   data-arc span      19405 days (53.13 yr)  
   first obs. used      1967-09-12  
   last obs. used      2020-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43938  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:48:51  

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

[ show close-approach data ]
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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