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American Association of the Variable Star observers (AAVSO) British Astronomical Association(BAA) Inter-University Centre for Astronomy and Astrophysics (IUCAA) The Confederation of Indian Amateur Astronomers (CIAA) Indian Institute Of Astrophysics (IIAP) Association Of Lunar & Planetary Observers (ALPO) International Astronomical Union (IAU) Royal Astronomical Society Of Canada National Aeronautic & Space Administration (NASA) Hubble Space Telescope (HST) Astronomical Society Of Pacific International Occultation Timing Association (IOTA)