Talk:Alpha Centauri/GA1

GA Review
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Reviewer: Jens Lallensack (talk · contribs) 18:37, 17 January 2016 (UTC)

I will review this. --Jens Lallensack (talk) 18:37, 17 January 2016 (UTC)

Looking good. Here are my comments so far:


 * link "flare"
 * some information in the article come without citations. Information needs to be verifiable according to the GA criteria. Would it be possible to add additional citations?
 * The projected rotational velocity ( v·sin i ) is 1.1 ± 0.8 km·s−1, resulting in an estimated rotational period of 41 days. (An earlier, 1995 estimate gave a similar rotation period of 36.8 days.) – A minor thing here: I would suggest to remove the brackets, and to add date and source for the more recent estimate.
 * Section "Nature and components": Alpha Centauri A and B are both summarized, but Alpha Centauri C is lacking information. Yes, the info can be found within the article Proxima Centauri, but for comparisons it would be good to include the same information that is given for the other two stars (luminosity, rotational period etc.).
 * best replace Gyr with "billion years", enhancing comprehensibility.

more will follow. --Jens Lallensack (talk) 19:23, 17 January 2016 (UTC)

I've only just taken a quick look. The first thing that caught my eye was the "Alpha Centauri AB distance estimates" section. The presence of the table seems to lack context and I'd like to see a brief text introduction. A casual reader might wonder: why is the table here and what does it mean in plain English. Searching the text I saw "As the stars of Alpha Centauri approach us, the measured proper motion and trigonometric parallax slowly increase." Including a table like this implies to me that it illustrates some significant trend over time, but the data doesn't support the text statement. --mikeu talk 01:09, 19 January 2016 (UTC)
 * The stellar distance estimates tables have been discussed before, and opinions were mixed. The data is a direct reflection of the improvements in parallax measurement technology and doesn't tell the reader anything useful about the star system itself. A few people seem to find them of value; I don't. Praemonitus (talk) 21:00, 27 January 2016 (UTC)

The "View from this system" and "View from a hypothetical planet" sections seem a bit long and lack citations. Have these topics been discussed at length in reliable sources? Is the material notable enough to warrant extensive discussion in the article? Those are longer than "Observational history" which contains more important information (early parallax measurements) giving these sections undue weight to a topic of more trivial importance. --mikeu talk 02:10, 19 January 2016 (UTC)

The main picture seems to be of Alpha Centauri and Beta Centauri, not Alpha Centauri A and Alpha Centauri B, according to its own caption. ?Jientho (talk) 19:06, 26 January 2016 (UTC)

Query
Jens Lallensack, where does this nomination stand? The nominator, Marenello Prime, has not edited on Wikipedia since January 7, the day this article was nominated. Given that there hasn't been any response there, either someone needs to be willing to take over the task of making the necessary fixes to the article, or the nomination should probably be closed. BlueMoonset (talk) 22:30, 8 February 2016 (UTC)

You are right. I closed the nomination due to inactiveness of the nominator, in the hopes that he will resume working on the article and nominate it again once it's in shape. --Jens Lallensack (talk) 08:32, 9 February 2016 (UTC)