[vsnet-chat 456] Re: N:: near M 51

[Taichi Kato <tkato>]

Dobry den!

> I would like to inform you that I went through many images of M 51 on
> the Internet using some CCD astronomy discusion groups, searchers as
> altavista and check star close to M 51 which is suspected to be variable
> as an nova. The star was always faint and no image showed some
> brightening.
>       [rest of message edited out]
> Rudolf

> No I wrote here about star which is named in Downes & Shara as an  CVn2.
> Rudolf

   The object is NSV06278.  The source reference is Observatory 32, 215
(1909) by J. E. Gore.  His description is:

  "From a comparison of photographs of the great spiral nebula Messier 51
in Canis Venatici taken by the late Dr. Issac Roberts, the late Dr. W. E.
Wilson, and others, I find that a small star a little north preceding the
nucleus of this nebula is variable.  It is visible on some of the
photographs and invisible on others.  The star in question is No. 73 of
Dr. Roberts's list on p.109, vol. ii of 'Photographs of Stars, Star-Clusters,
and Nebulae', where its position with reference to the nucleus of the
nebula is given as 307o 5', distance 233" (1898) (the angle should be
305o 46', as afterwards corrected by Dr. Roberts himself).  The star is
identical with Lord Rosse's No. 14 (G.C. 3572, 'Transactions, Royal
Dublin Society', vol. ii. p.130), where the position is given as
304o 49'; 236".9 (1872-74).  The star is missing (or perhaps very faintly
visible) on Dr. Wilson's photograph taken March 6, 1897, with 2-foot
reflector.  On this photograph there is a small star closely preceding
Dr. Roberts's No. 68, which is missing in Dr. Roberts's photograph.
This also is probably variable.  The star No. 73 is faint on Dr. Roberts's
photograph taken April 29 (vol. i.), but is very visible on photograph
taken April 15, 1898 (vol. ii)."

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp