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4712 Iwaizumi (1989 QE)
Classification: Main-belt Asteroid          SPK-ID: 2004712
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1371644630482346 3.9722e-08  
a 3.147402242814577 1.5966e-08 au
q 2.715690504182107 1.2802e-07 au
i 12.22919268703035 4.5089e-06 deg
node 334.0686386725768 1.5142e-05 deg
peri 350.2217072613005 1.9395e-05 deg
M 225.3594933698048 1.3371e-05 deg
tp 2459963.281301145241
(2023-Jan-18.78130114)
7.7856e-05 TDB
period 2039.514521187217
5.58
1.5519e-05
4.249e-08
d
yr
n .1765125946690692 1.3431e-09 deg/d
Q 3.579113981447049 1.8157e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2833  
   data-arc span      32886 days (90.04 yr)  
   first obs. used      1931-03-10  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40726  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:48:05  

Additional Information
 Earth MOID = 1.7029 au 
 Jupiter MOID = 1.78019 au 
 T_jup = 3.159 
[ 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 11.46   n/a E2021B10  
diameter diameter 28.778 km 0.347 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.2486 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]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.095   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4712 Iwaizumi (1989 QE)          Discovered 1989-Aug-25 by Endate and Watanabe at Kitami
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1989 QE = 1931 EN = 1950 RB1 = 1964 CB = 1979 YN2 = 1987 FO1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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