Talk:Epsilon Canis Majoris

Absolute Magnitude of the companion

How is it possible that the dim companion of ε Canis Majoris has absolue magnitude -5.0 while the brighter one has only -4.1? Since they are at the same distance from Earth and the Luminosity ratio is 1:250, the dimmer star should have absolute magnitude around +1.9. Easy n (talk) 22:20, 2 January 2009 (UTC)[reply]

I agree. The absolute magnitude is 7.5 + 5(log( 0.00757 ) + 1) = 1.9. I modified the article.—RJH (talk) 18:52, 9 April 2010 (UTC)[reply]

External links modified

Hello fellow Wikipedians,

I have just added archive links to one external link on Epsilon Canis Majoris. Please take a moment to review my edit. If necessary, add {{cbignore}} after the link to keep me from modifying it. Alternatively, you can add {{nobots|deny=InternetArchiveBot}} to keep me off the page altogether. I made the following changes:

Added archive https://web.archive.org/20140330070342/http://www.fotw.net:80/flags/br_astro.html to http://www.fotw.net/flags/br_astro.html

When you have finished reviewing my changes, please set the checked parameter below to true to let others know.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 5 June 2024).

If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—^{cyberbot II}_{Talk to my owner:Online} 20:52, 12 February 2016 (UTC)[reply]

Any information regarding the companion?

There is no citations whatsoever on any information on the companion, even the "it is called Adhara B" has no references.

Where exactly did the notion that "Adhara B exists" come from? Cited sources seems to avoid referencing it, Pancakes321 (talk) 02:21, 10 March 2025 (UTC)[reply]

It is included in SIMBAD 21 Andromedae (talk) 09:23, 10 March 2025 (UTC)[reply]

Simbad makes a poor reference for anything except basic identifiers. It simply reflects information published in other sources and is updated from time to time. Net result, the value at Simbad may well not be the same as the one in the article next time anyone checks. Even adding an access date isn't a great help since there isn't a simple way to check the history of a Simbad page, and archiving them all is not a sensible path to take. Lithopsian (talk) 14:45, 10 March 2025 (UTC)[reply]

It gives a Gaia DR3 identifier, which on itself has the parallax, proper motion and physical parameters. 21 Andromedae (talk) 01:01, 11 March 2025 (UTC)[reply]

It also lists (close to) all published papers mentioning that object, but that it is hardly a helpful reference to think someone will find the appropriate paper, out of probably hundreds, that supports some claim. Cite the paper and the job's done. If the OP can't find it and include it, what chance does anyone else have? Some of the key information is on the main Simbad page for each object (usually with a bibcode link to where that data actually came from), but it changes regularly, so even worse since you can be fairly sure it will be wrong in a year or two. Lithopsian (talk) 14:25, 11 March 2025 (UTC)[reply]