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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 ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1713664011916429 4.4613e-08  
a 2.189306029693143 9.7659e-09 AU
q 1.814132534277465 9.538e-08 AU
i 1.652356657597682 5.4857e-06 deg
node 101.9694304244684 0.00015888 deg
peri 284.0476530775384 0.00015989 deg
M 86.36315412226054 1.7358e-05 deg
tp 2456516.653116032791
(2013-Aug-12.15311603)
5.6489e-05 JED
period 1183.199933660792
3.24
7.9169e-06
2.168e-08
d
yr
n .3042596519475527 2.0358e-09 deg/d
Q 2.564479525108821 1.1439e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1198  
   data-arc span      19142 days (52.41 yr)  
   first obs. used      1961-10-18  
   last obs. used      2014-03-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51109  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 18:04:01  

Additional Information
 Earth MOID = .817768 AU 
 T_jup = 3.654 
[ 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  

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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