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4641 Ayako (1990 QT3)
Classification: Main-belt Asteroid          SPK-ID: 2004641
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1716700651863768 4.4024e-08  
a 2.188589064672185 9.1527e-09 AU
q 1.812873837273719 9.4405e-08 AU
i 1.652330585919705 4.7254e-06 deg
node 101.9676301710612 0.00015616 deg
peri 283.961192307836 0.00015692 deg
M 147.3069082069511 1.657e-05 deg
tp 2456516.589129888970
(2013-Aug-12.08912989)
5.303e-05 JED
period 1182.618760793123
3.24
7.4186e-06
2.031e-08
d
yr
n .3044091738901268 1.9096e-09 deg/d
Q 2.56430429207065 1.0724e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1333  
   data-arc span      19587 days (53.63 yr)  
   first obs. used      1961-10-18  
   last obs. used      2015-06-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51202  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:49:19  

Additional Information
 Earth MOID = .817657 AU 
 T_jup = 3.655 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9 mag n/a MPO279563  
rotation period rot_per 5.3126 h n/a LCDB (Rev. 2015-May); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2013) http://www.asu.cas.cz/~ppravec/neo.htm]

4641 Ayako           Discovered 1990 Aug. 30 by K. Endate and K. Watanabe at Kitami.
Ayako Endate (b.~1971) is the wife of the first discoverer of this minor planet.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110218/MPCPages.arcLast Updated: 2011-02-22

[ show close-approach data ]
Alternate Designations
 1990 QT3 = 1935 SH1 = 1961 UK = 1976 GZ1 = 1977 RX1 = 1984 YO5 = 1984 YR6 = 1987 UU9 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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