ANNEX 1
Components of Double and Multiple Systems

Introduction

• Annex 1
• Catalogue of Components of Double and Multiple Stars
• Annex 1, Fields 1-3: Component Identification
  • Field 1: CCDM number
  • Field 2, 1st digit: Reference component when different from A
  • Field 2, 2nd digit: Component considered
  • Field 3: Hipparcos Input Catalogue (HIC) running number
• Annex 1, Fields 4-5: Position (Equinox J2000.0)
  • Field 4: Right ascension (equinox J2000.0)
  • Field 5: Declination (equinox J2000.0)
• Annex 1, Field 6: Photometry
  • Field 6: Magnitude
• Annex 1, Fields 7-10: System Geometry
  • Field 7: Date of observation of the relative position (for separations smaller than 10 arcsec)
  • Field 8: Position angle in degrees (when available)
  • Field 9: Separation in arcsec (when available)
  • Field 10, 1st digit: O = system with known orbit
  • Field 10, 2nd digit: A = astrometric binary
• Annex 1, Fields 11-12: Proper Motion
  • Field 11: Proper motion in right ascension
  • Field 12: Proper motion in declination
• Annex 1, Fields 13-19: Cross-Identifications
  • Field 13: DM number
  • Field 14: HD/HDE number
  • Field 15: AGK3 or SAO number
  • Field 16: IDS number
  • Field 17: ADS number
• Acknowledgements
• References
• The Executive Committee
• The Steering Committee
• Main Participants
• Occasional Observers and Participants
• Contributors to the Tasks and Working Groups
• About this document ...