NSDB1-Access to Natural Satellites Astrometric Data Files

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                                Period          Number           Sites                                                           Download    Available
                                            of observations                                   References                          files         as 
                              of observations               of observation                                                                   standard
                                                                                                                            content data1 data2  data
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                              1973-1973       94 observ.       27 sites       Arlot et al (1974), Aksnes et al (1984)       Content Data1 Data2   no
                              1979-1980       22 observ.       11 sites    Arlot et al (1982), Aksnes et al (1984 & 1984)   Content Data1 Data2   no
                              1985-1985      167 observ.       25 sites                   Arlot et al (1992)                Content Data1 Data2   no
                              1990-1991      375 observ.       55 sites                   Arlot et al (1997)                Content Data1 Data2   no
                              1996-1997      275 observ.       42 sites                   Arlot et al (2006)                Content Data1 Data2   no
                              2003-2003      377 observ.       42 sites                   Arlot et al (2009)                Content Data1 Data2   no
                              2009-2009      457 observ.       74 sites                   Arlot et al (2014)                Content Data1 Data2   yes
                              2014-2015      607 observ.       74 sites                   Saquet et al (2018)               Content Data1 Data2   no
                              2021-2021      85 observ.        29 sites              Emelyanov et al (in press)             Content Data1 Data2   no

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          Note: data1= data on the timing of the mutual events: date of the maximum in UTC and observed magnitude drop (except for the 2009, 2015, 2021 occurrences)
                data1= data on the astrometric positions extracted from the mutual events (for the 2009, 2015, 2021 occurrences)
                data2= data of the observed photometric lightcurves; date and magnitude drop for each point