21564+3001

  • Unique Name: 21564+3001MLB 721AC
  • RA: 21 56 21.84
  • Dec: +30 01 53.6
  • Discoverer: MLB
  • Discoverer Number: 721
  • Components: AC
  • First year: 1931
  • Last year: 2002
  • Observations: 3
  • First position angle: 206
  • Last position angle: 203
  • First separation: 5.3
  • Last separation: 5.7
  • Mag first component: 11.35
  • Mag second component: 12.0
  • Spectral type:
  • Primary proper motion RA: -2
  • Primary proper motion DEC: -7
  • Secondary proper motion RA: 40
  • Secondary proper motion DEC: -33
  • Durchmusterung:
  • Notes:
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