21009+4730

  • Unique Name: 21009+4730BU 1290AB
  • RA: 21 00 56.09
  • Dec: +47 29 37.3
  • Discoverer: BU
  • Discoverer Number: 1290
  • Components: AB
  • First year: 1898
  • Last year: 2010
  • Observations: 17
  • First position angle: 16
  • Last position angle: 33
  • First separation: 3.9
  • Last separation: 8.6
  • Mag first component: 10.09
  • Mag second component: 10.65
  • Spectral type:
  • Primary proper motion RA: 10
  • Primary proper motion DEC: 10
  • Secondary proper motion RA: 47
  • Secondary proper motion DEC: 45
  • Durchmusterung: +46 3142
  • Notes: L
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