21023+3931

  • Unique Name: 21023+3931H 4 113AB
  • RA: 21 02 20.96
  • Dec: +39 30 32.5
  • Discoverer: H 4
  • Discoverer Number: 113
  • Components: AB
  • First year: 1783
  • Last year: 2012
  • Observations: 32
  • First position angle: 300
  • Last position angle: 299
  • First separation: 18.7
  • Last separation: 19.2
  • Mag first component: 6.62
  • Mag second component: 9.49
  • Spectral type: K3II-III
  • Primary proper motion RA: 2
  • Primary proper motion DEC: 1
  • Secondary proper motion RA: 1
  • Secondary proper motion DEC: 0
  • Durchmusterung: +38 4321
  • Notes: N D
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