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9556 Gaywray (1986 GF)
Classification: Main-belt Asteroid          SPK-ID: 2009556
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1804974700228404 6.7587e-08  
a 2.319032694654727 1.5125e-08 AU
q 1.900453160369299 1.5682e-07 AU
i 23.57334257019324 8.6257e-06 deg
node 206.7081157417504 1.7358e-05 deg
peri 315.4253600552393 2.7054e-05 deg
M 9.976304560450036 2.1571e-05 deg
tp 2456764.754124995992
(2014-Apr-17.25412500)
7.7204e-05 JED
period 1289.907993833566
3.53
1.2619e-05
3.455e-08
d
yr
n .279089672845651 2.7304e-09 deg/d
Q 2.737612228940156 1.7855e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      781  
   data-arc span      10173 days (27.85 yr)  
   first obs. used      1986-04-08  
   last obs. used      2014-02-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53198  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 10:54:55  

Additional Information
 Earth MOID = .94816 AU 
 T_jup = 3.447 
[ 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 13.2 mag n/a MPO250305  
rotation period rot_per 920. h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2011) http://www.asu.cas.cz/~ppravec/neo.htm]

9556 Gaywray           Discovered 1986 Apr. 8 by INAS at Palomar.
Gay Firestone Wray is an enthusiastic contributor to astronomy research through the Firestone postdoctoral fellowship at the Smithsonian Astrophysical Observatory. A volunteer leader with many charitable organizations, she has contributed greatly to the Smithsonian's mandate for the "increase and diffusion of knowledge".
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090209/MPCPages.arcLast Updated: 2009-02-11

[ show close-approach data ]
Alternate Designations
 1986 GF = 1979 HE4 = 1993 HJ1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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