Content
    asteroid: (42355)Typhon
   satellite: Echidna
total number: 5
        type: position
       dates: 2006-2006
 observatory: 250 - Hubble Space Telescope (HST)

Reference
Grundy W.M., Noll K.S., Virtanen J., Muinonen K., Kern S.D., Stephens D.C.,
Stansberry J.A., Levison H.F., Spencer J.R.
(42355) Typhon-Echidna: Scheduling observations for binary orbit determination.
Icarus. 2008. V. 197. Issue 1. P. 260-268.
2008Icar..197..260G

Informations
         relative to: primary
     reference frame: astrometric ICRF
     centre of frame: topocentre
    epoch of equinox: J2000
          time scale: UTC
           reduction: not available
         coordinates: r, R, g, X, Y (secondary relative to primary)
            receptor: CCD
           telescope: HST HRC/ACS (High-Resolution Camera of the Advanced Camera for Surveys)

Comment: no 

Format   
  1. Year of the moment of observation
  2. Month of the moment of observation
  3. Day of the moment of observation
  4. Hour of the moment of observation with decimals
  5. r(au) - the distance from the Sun to the target  
  6. R(au) - the distance from the observer to the target
  7. g(deg) - the phase angle, the angular separation between the observer and Sun as seen from the target
  8. X(arcsec) - relative right ascension.
  9. sigma(X)(arcsec) - 1-sigma uncertainties X
 10. Y(arcsec) - relative declination
 11. sigma(Y)(arcsec) - 1-sigma uncertainties Y

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Year    Day  hour     r       R          g       X      sigma(X)     Y      sigma(Y) 
   Month              AU      AU        deg    arcsec   arcsec   arcsec     arcsec
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