Contents.
      planet: 5 - Jupiter
  satellites: J1 - Io       :  2,
              J2 - Europa   :  0,
              J3 - Ganymede :  4,
              J4 - Callisto :  1
total number: 7
        type: relative
       dates: 2021-2021
 observatory: see observatories below.

Reference.
    Emelyanov N. V., Arlot J.-E. and 38 co-authors
    The PHEMU21 catalogue and astrometric results of the
    observations of the mutual occultations and eclipses of the
    Galilean satellites of Jupiter made in 2021.
    Monthly Notices of the Royal Astronomical Society.
    2022. V. 516, P. 3685-3691. DOI:10.1093/mnras/stac2538
    See Abstract

Informations.
         relative to: reference body is an occulted or eclipsed satellite:
                      J1 - Io       :  4,
                      J2 - Europa   :  1,
                      J3 - Ganymede :  1,
                      J4 - Callisto :  1
     reference frame: astrometric
     centre of frame: topocenter for mutual occultation
                      or heliocenter for mutual eclipse
    epoch of equinox: J2000
          time scale: UTC
           reduction: from mutual occultations and eclipses
         coordinates: Position angle (topocentric for mutual occultation
                      or heliocentric for mutual eclipse)
    diff. refraction: no information
            receptor: photometric (see the relevant article)
           telescope: See in the publication
           observers: See in the publication
 data included in standard data file : no

Comments.
     Data are deduced from the photometric observations
     of the mutual occultations and eclipses made 
     during the international campaign in 2021. 
     The description of these astrometric data
     is given in the relevant article (see Reference).
     The coordinates of the observatories are given below.
     The second group of the data is presented in this item.
     The "O-C' are given with respect of the theory by V.Lainey
     (Lainey, V., Arlot, J. E., Karatekin, O., van Hoolst, T. 2009. 
     Nature. V. 459. P 957.)
     The first group of the data see in the item jg0067 of the NSDC.
         
Observatory code with geographic coordinates. 

       East                 Altitude m  Observers,
       Longitude Latitude   or          Affiliations
Code   deg       deg        IAU Code 
---------------------------------------------------------
AUR    1.690555  43.540833   241.0     Andre P., IOTA-ES, Societe Astronomique de France, Adagio Belesta 
GLE  150.500444 -23.130109   (Q70)     Kerr S., Trans-Tasman Occultation Alliance, Murrumbateman Observatory, Australia;
GRA  248.131306  33.816694   830.0     George T., IOTA, Scottsdale, AZ USA;
OAG    5.340278  43.150555   200.0     Gourdon F., Roger P., OAGC Observatoire Astronomique du Gros Cerveau, Ollioules, France;
PAU  248.04778   33;811944     0.0     Maley P., IOTA and NASA Johnson Space Center Astronomical Society, Carefree, AZ, USA
MAD  356.338889  40.449167   720.0     Izquierdo J., Agrupacion Astronomica de Madrid, Madrid, Spain;
     
Format.
  1. Observatory code see the table above.
  2. The type of the phenomenon (eclipse or occultation) including the
     satellite numbers. The type of phenomenon is coded as n_a o n_p 
     or n_a e n_p for a mutual occultation or eclipse, respectively.
     Here $n_a$ is the number of the occulting or eclipsing satellite 
     and $n_p$ is the number of the occulted or eclipsed satellite.
  3. Year of observation
  4. Month of observation
  5. Day of observation
  6. Hour of the astrometric data (UTC)
  7. Minute of the astrometric data (UTC)
  8. Seconde of the astrometric data with decimals (UTC)
  9. Position angle A in degrees (topocentric for mutual occultation
                                or heliocentric for mutual eclipse)
 10. Precision of apparent position along the apparent relative trajectory 
     of the satellite as obtained with the least-square method, in arcseconds
 11. O-C along the apparent relative trajectory, in arcseconds.
 12. Flag R assigned showing the reason why only one coordinate was determined: 
     R=0 - there is no doubt about the results;
     R=1 - astrometric results are doubtful.

------------------------------------------------------------
Observ. Year                   Position     sigma    
code        month    UTC        angle A             O-C    R
    Type      date  h  m  s     deg         arcsec  arcsec 
------------------------------------------------------------