Journal of Astrophysics and Astronomy

, Volume 9, Issue 4, pp 193–203 | Cite as

Composite spectra paper 2: HD 88021/2

  • R. Griffin


HD 88021/2 (ADS 7662) is a very close visual binary. The accepted visual orbit, which is of very high eccentricity and graded “reliable”, led to the expectation of a periastron passage in 1981, when there should have been a large difference in radial velocity between the components. No such event took place, and there is little indication that it is likely to occur in the near future. A new interpretation of the visual orbital data leads to an orbit of a different character from those hitherto proposed. A decision between the competing orbits should be possible within a very few years. Meanwhile, the method of spectral subtraction developed in Paper 1 has enabled us to separate the spectra of the two components and to show that their spectral types are K0 III and A2m.

Key words

composite spectra visual binaries stars, individual 


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Copyright information

© Indian Academy of Sciences 1988

Authors and Affiliations

  • R. Griffin
    • 1
    • 2
  1. 1.The ObservatoriesCambridgeEngland
  2. 2.Mount Wilson & Las Campanas ObservatoriesCarnegie Institution of WashingtonUSA

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