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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1804785869438607 6.2593e-08  
a 2.31911755792553 1.5727e-08 AU
q 1.900566498114433 1.4474e-07 AU
i 23.57284612815127 7.7625e-06 deg
node 206.7070025601799 1.6182e-05 deg
peri 315.45064976604 2.4646e-05 deg
M 65.77511494189531 1.8872e-05 deg
tp 2456764.809711674029
(2014-Apr-17.30971167)
6.7303e-05 JED
period 1289.978799311918
3.53
1.3122e-05
3.593e-08
d
yr
n .2790743539289374 2.8388e-09 deg/d
Q 2.737668617736626 1.8566e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      824  
   data-arc span      10657 days (29.18 yr)  
   first obs. used      1986-04-08  
   last obs. used      2015-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48401  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:02:28  

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 LCDB (Rev. 2015-May); Warner et al., 2009 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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