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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1804482668229545 6.2355e-08  
a 2.319529680897259 1.5507e-08 au
q 1.900974570134948 1.44e-07 au
i 23.5731144278761 7.4962e-06 deg
node 206.6954269401373 1.6093e-05 deg
peri 315.5295313322733 2.4067e-05 deg
M 177.3061295236041 1.8846e-05 deg
tp 2456764.994114614637
(2014-Apr-17.49411461)
6.6291e-05 JED
period 1290.32267160439
3.53
1.2939e-05
3.543e-08
d
yr
n .2789999803323422 2.7978e-09 deg/d
Q 2.73808479165957 1.8305e-08 au
  Orbit Determination Parameters
   # obs. used (total)      840  
   data-arc span      10837 days (29.67 yr)  
   first obs. used      1986-04-08  
   last obs. used      2015-12-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48355  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:11:05  

Additional Information
 Earth MOID = .948007 au 
 Jupiter MOID = 2.33956 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-December); 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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