Contents.
      planet: 8 - Neptune
  satellites: N03 - Naiad     : 16,
              N14 - Hippocamp : 20
total number: 36
        type: relative
       dates: 2004-2016
 observatory: Hubble Space Telescope (HST)

Reference.
  Showalter, M. R.; de Pater, I.; Lissauer, J. J.; French, R. S.
  The seventh inner moon of Neptune.
  Nature, Vol. 566, pp. 350–353 (2019).
  2019Natur_566__350S

Informations.
         relative to: Neptune
     reference frame: astrometric
     centre of frame: topocentre
    epoch of equinox: J2000
          time scale: UTC
           reduction: no information
         coordinates: differential (Delta alpha, Delta delta)
    diff. refraction: no information
            receptor: CCD
           telescope: Advanced Camera for Surveys with High Resolution Channel (2004–2005),
                      Wide Field Channel 3 with Ultraviolet/Visual Imager (2009, 2016)
           observers: M. R. Showalter, I. de Pater, J. J. Lissauer, R. S. French
 data included in standard data file: no

Comments.
  Observations of N14 (Hippocamp) in 2004–2009 seem to be new reduction of the observations available in ni0004.
          
Format.
  1. Index of satellite (N): 03 - Naiad, 14 - Hippocamp
  2. Year of the date of observation
  3. Month of the date of observation
  4. Day of the date of observation
  5. Hour of the date of observation
  6. Minute of the date of observation
  7. Seconds of the date of observation
  8. X position on the CCD image with decimals (X)
  9. Uncertainty of the X position (sig_X)
  10. Y position on the CCD image with decimals (Y)
  11. Uncertainty of the Y position (sig_Y)
  12. Delta alpha with decimals (delta_a, arcsec)
  13. Uncertainty of Delta alpha (sig_a, arcsec)
  14. Delta delta with decimals (delta_d, arcsec)
  13. Uncertainty of Delta delta (sig_d, arcsec)
  14. Disk-integrated photometry (D, km^2)
  15. Uncertainty of Disk-integrated photometry (sig_D, km^2)
  16. Signal-to-noise ratio (SNR)

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N   Year    Day           X        sig_X  Y        sig_Y  delta_a   sig_a    delta_d   sig_d    D      sig_D SNR
         Month  h  m  s                                   arcsec    arcsec   arcsec    arcsec   km^2   km^2
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