Notes for BD+31 643

by Jean Schneider

update: 7 March 1997

The disk:

• Detection method: V, R & IR imaging
• Basic data:
  • Radius:       6,600 AU
  • Depleted region:      2,300 AU (radius)
  • Inclination:      0 ^o - 10 ^o.
  • Position angle:      131 ^o ± 5 ^o.
  • Picture of the disk
• Remarks: PA of binary the star: 16 ^o ± 2 ^o: thus the binary and the disk make an angle of at most 25 ^o.
• References:
  1. KALAS P. & JEWITT D., 1997
     A candidate dust disk surrounding the binary stellar system BD+31°643
     Nature 386, 52
     abstract
• Other Web pages:
  1. BD+31 643 (by Paul KALAS)

The star:

• Distance: ~ 300 pc
• Separation: ~ 90 AU (0.6 arcsec)
• Spectral types: binary B5V, B5V
• Apparent magnitude: m_V = 8.5
• Absolute luminosity:
• Coordinates (2000):     RA = 03 44 34.08      DEC = +32 09 46.8
• More data:
  • Basic Data (from simbad )
  • Most recent refs. (enter BD +31 643 in the "object" field)