Talk:Kepler-22

Star Position[edit]

It would be nice to get the HIP or HD ID of this star. If this is a known star from a catalog, it is possible that it has a Wikipedia page entry and the two pages should be merged. --71.199.2.101 (talk) 22:46, 5 December 2011 (UTC)[reply]

I'm not sure a faint star like this one (apparent magnitude near 11 or 12?) would be in those catalogues, but it should sure have a GSC number. /79.138.171.236 (talk) 23:58, 5 December 2011 (UTC)[reply]

Here's the answer: http://kepler.nasa.gov/Mission/discoveries/ – It says right ascension 19:16:52.2 and declination +47°53′4,2″. /JeppeSN — Preceding unsigned comment added by 79.138.171.236 (talk) 00:34, 6 December 2011 (UTC)[reply]

It seems to have similar characteristics to HD 181021 [position, spectral type], but the measurements are all slightly different. However, Wikipedia doesn't have an article on that star. Algebra15 (talk) 18:31, 26 November 2014 (UTC)[reply]

Star Photo[edit]

A photo would be nice too. 64.134.124.157 (talk) 23:34, 5 December 2011 (UTC)[reply]

Constellation?[edit]

This will be of interest to both scientists and non scientists, allowing people to know where it is located in the sky. 64.134.124.157 (talk) 23:40, 5 December 2011 (UTC)[reply]

It's in Cygnus, according to [1]. /79.138.171.236 (talk) 23:56, 5 December 2011 (UTC)[reply]

coincidence?[edit]

funny that a first habitable extrasolar planet should be found orbiting a star carrying the same name as the observatory finding it. how come? ;-) btw. the magnitude of the star should be interesting. --192.76.172.69 (talk) 14:56, 6 December 2011 (UTC)[reply]

Kepler is a designation type for this star, not a name. All the KOIs are referred to by their Kepler-designation. Algebra15 (talk) 06:21, 27 November 2014 (UTC)[reply]

Dubious additions[edit]

According to the following source, KOI-087 is located at RA=19.28117 (19^h 16^m 52.2^s), Dec=47.8845 (+47° 53′ 4.2″), which agrees with the listed data.

Borucki, William J.; et al. (2011), "Characteristics of Planetary Candidates Observed by Kepler. II. Analysis of the First Four Months of Data", The Astrophysical Journal, 736 (1), Bibcode:2011ApJ...736...19B, doi:10.1088/0004-637X/736/1/19 {{citation}}: Unknown parameter |month= ignored (help)

However, this star has an estimated 1.07 M_☉, which does not agree with the statement that this star is smaller than the Sun. It is unclear where the designation KOI-087 came from, but it appears suspect. Regards, RJH (talk) 18:28, 6 December 2011 (UTC)[reply]

Couldn't it be a denser star? Algebra15 (talk) 06:23, 27 November 2014 (UTC)[reply]

The designation KOI-087 is given in this page: http://kepler.nasa.gov/Mission/discoveries/ (table in middle of page). /79.138.170.28 (talk) 21:49, 6 December 2011 (UTC)[reply]

Okay, thanks. Maybe it will be cleared up later. Regards, RJH (talk) 22:37, 6 December 2011 (UTC)[reply]

When I go to this site and look up 87, it also shows a star with 1.1 solar masses. Hmm... Regards, RJH (talk) 15:46, 8 December 2011 (UTC)[reply]

Age[edit]

Any indications on the age of this star ? It would have quite a big bearing on the age of Kepler 22b and possibility of life emerging in the planetary system. --EvenGreenerFish (talk) 01:52, 7 December 2011 (UTC)[reply]

Well, its just speculation on my part, but it appears that the star has relatively low metallicity and a particularly low projected rotational velocity. That would suggest, albeit not conclusively, that the star may be older than the Sun. I'm sure there will be more follow-up studies that give us a better idea. Regards, RJH (talk) 15:57, 7 December 2011 (UTC)[reply]

When was this star discovered/named? Surely they knew about it before the 22b planet? --TheTruthiness (talk) 06:18, 8 December 2011 (UTC)[reply]
- It looks like the Kepler Input Catalog was constructed between 2006 and 2008. This star may or may not have been in an earlier catalog: this paper lists several sources. Regards, RJH (talk) 15:42, 8 December 2011 (UTC)[reply]
- The star was named "Kepler-22" just now, as the name suggests. Most stars are not notable enough to get even such a boilerplate name, AFAIK. --Roentgenium111 (talk) 17:13, 8 December 2011 (UTC)[reply]

Name of host star[edit]

There seems to be a serious debate over whether the star name is Kepler 22 or Kepler 22A. I think the protocol for naming "star systems" and "stars" should be addressed front and center. Kepler N is the name given to a star system, N = 1,2,..., the order depending on chronological discovery. Stars in the system Kepler N are then named (again in the order of discovery) by appending upper case letters A, B, C, etc. to the system name, and likewise planets by appending lower case letters b, c, d, etc. Thus Kepler 11A is the first discovered star in the 11th discovered system (Kepler 11), while Kepler 11b would be the first discovered planet in that system. However, for star systems consisting of only one star, it is customary to drop the upper case letter. Thus (referencing my example) Kepler 11 would refer both to the star system and to the unique star inhabiting that system. One can find sundry sources for this protocol, e.g., the Department of Physics, Oxford University -- see http://www2.physics.ox.ac.uk/blog/astro-blog/2011/12/10/kepler-22b-what-you-need-to-know Awoldar (talk) 21:13, 16 February 2012 (UTC)[reply]

I'm not sure why, but side-bar issues like this always seem to attract a lot of attention and conflict, whereas actually building the content into and interesting and readable article... not so much. One of life's little ironies, I guess. :-) Personally, I have no particular preference in what the article is called, so long as it can be located. Regards, RJH (talk) 23:36, 16 February 2012 (UTC)[reply]