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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 ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1804785846113195 6.2633e-08  
a 2.319117558565143 1.5745e-08 AU
q 1.900566504048047 1.4485e-07 AU
i 23.57284681543241 7.7914e-06 deg
node 206.7070023044597 1.6184e-05 deg
peri 315.4506489864296 2.4677e-05 deg
M 65.77511549677256 1.8885e-05 deg
tp 2456764.809709588246
(2014-Apr-17.30970959)
6.7355e-05 JED
period 1289.978799845583
3.53
1.3137e-05
3.597e-08
d
yr
n .2790743538134842 2.842e-09 deg/d
Q 2.737668613082239 1.8586e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      819  
   data-arc span      10344 days (28.32 yr)  
   first obs. used      1986-04-08  
   last obs. used      2014-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48281  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:14:56  

Additional Information
 Earth MOID = .948946 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. 2014-Mar-01) 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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