[vsnet-chat 1062] Re: CK Ori etc.

[Taichi Kato <tkato>]

Arne Henden wrote:

> why has this star been observed, and is still on the programs of such
> groups?  It would seem to me that a year or two of observation would have
> been sufficient to prove/disprove the 120 day reported period and half-mag
> amplitude.  Was this a case of someone just not bothering to remove the
> star, or was there a conscious effort to keep observing this star?  Seems
> like a waste of some good observer's time.

   Some of them my be explained by observers' habit (also my own).  Well-
accustomed visual observers tend to feel comfortable at regularly visiting
a regular sequence of variable stars, regardless of the variability or the
visibility (since most dwarf novae are invisibile).  For example, I used to
observe (when I regularly made visual observations) a sequence of RZ Sge -
WZ Sge - FG Sge - V Sge - PU Vul.  A different observing sequence (sometimes
obliged by the interevening clouds) caused slight discomfort.  CK Ori may
be on some similar regular visiting route of binocular variable star
observers, something like CK Ori - W Ori - CI Ori - RX Lep etc.

   Another explanation: the vairiable element of CK Ori has been so widely
distributed (even a common book lists it as a bright binocular variable),
that people can't find reason to exclude this particular star from their
list.

Regards,
Taichi Kato

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