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Mark Fisher
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Yed Prior
Delta Ophiuchi, 1 Ophiuchi
Proper Name
  Yed Prior
Bayer Designation
  Delta Ophiuchi
Flamsteed Number
  1 Ophiuchi
BSC
  6056
HD
  146051
Constellation
  Ophiuchus
Right Ascension
  16h 14m 21s
Declination
  -3° 41' 40"
Distance
  170 light years
  52 parsecs
Magnitude
  Apparent: +2.8
  Absolute: -0.8
Spectral Class
  M1 Red Giant
Optimum Visibility
  June
 This variable red giant lies very close to Ophiuchus' border with neighbouring Serpens Caput. About one degree 'behind' it as it travels across the sky is another giant, Yed Posterior. While these two appear to be close companions, they are in fact some seventy light years apart.
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    		•  Related Entries
  • Ophiuchus
  • Serpens
  • Yed Posterior
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