Talk:Kepler-444

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Notes[edit]

Can someone add the age and mass off this star aswell as luminosity vs our sun to the data box --JSon94 (talk) 00:05, 28 January 2015 (UTC)[reply]

Should note the Mike Wall Space.com ref^[1] is the primary source; whereas the Yahoo news ref source is a copy of the original Mike Wall ref - in any case - Enjoy! :) Drbogdan (talk) 00:56, 28 January 2015 (UTC)[reply]

^ Wall, Mike (27 January 2015). "Found! 5 Ancient Alien Planets Nearly As Old As the Universe". Space.com. Retrieved 27 January 2015.

Distance[edit]

trying to find the distance to the star. Along with lumoinsity too. I have the other data added.JSon94 (talk) 01:01, 28 January 2015 (UTC)[reply]

just need luminosity it's a KO orange dwarf JSon94 (talk) 01:11, 28 January 2015 (UTC)[reply]

Is this system really unusual?[edit]

Both the compact planets and how close they orbit. How'd they manage to stay in such of compact system for 2x longer than our solar system? look how chaotic our solar system was. I feel this may be quite a discovery JSon94 (talk) 01:34, 28 January 2015 (UTC)[reply]

According to science paper, the most unusual thing about this system currently are the sizes of the planets. At the moment, systems most similar to this are Kepler-80, Kepler-32 and Kepler-33. --Artman40 (talk) 20:06, 28 January 2015 (UTC)[reply]

You could add another planetary system chart underneath of our own system for comparison. I find the eccentricities to be interesting, and a comparison would be enlightening. Something like this:

The Kepler-444 planetary system^[1]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
Kepler-444b	—	0.04178	3.60001053	0.16	88°	0.4 $R$ _🜨
Kepler-444c	—	0.04881	4.5458841	0.31	88.2°	0.497 $R$ _🜨
Kepler-444d	—	0.06	6.189392	0.18	88.16°	0.53 $R$ _🜨
Kepler-444e	—	0.0696	7.743493	0.1	89.13°	0.546 $R$ _🜨
Kepler-444f	—	0.0811	9.740486	0.29	87.96°	0.741 $R$ _🜨

The Kepler-444 planetary system
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
Mercury	0.055 $M$ _🜨	0.387	87.9691	0.205630	7.005°	0.3829 $R$ _🜨
Venus	0.815 $M$ _🜨	0.723	224.701	0.0067	3.39458°	0.9499 $R$ _🜨
Earth	1 $M$ _🜨	1.00	365.256	0.01671022	7.155°	1 $R$ _🜨
Mars	0.107 $M$ _🜨	1.524	686.971	0.0935	5.65°	0.533 $R$ _🜨

24.79.36.94 (talk) 21:40, 2 February 2015 (UTC)[reply]

This star also appears to have 2 faint M dwarfs in orbit around it which makes it even stranger when you look at the planets. IMO this system needs some serious studyingJSon94 (talk) 23:32, 2 February 2015 (UTC)[reply]

it's too bad the article doesn't have some kind of comparison diagram,
something more accurate than this: https://farm8.staticflickr.com/7308/16245011907_e7ee015ed8_o.png
This fellow appeared to be doing some interesting ones, he would be the one to ask: https://commons.wikimedia.org/wiki/User:Icalanise
24.79.36.94 (talk) 01:57, 8 February 2015 (UTC)[reply]

I'd be very interested in taking a shot at calculating the Effective temperatures or just Irradiance received by these planets, and I've looked around and can't find anything on this being a trinary system. Where did you happen to read it had two companion stars? 24.79.36.94 (talk) 04:43, 8 February 2015 (UTC)[reply]

Illustration[edit]

Would it be useful to have a picture depicting the orbital configuration and sizes of planets? --Artman40 (talk) 13:32, 28 January 2015 (UTC)[reply]

I think this system deserves an illustration just as much as any other that has one. 24.79.36.94 (talk) 22:03, 2 February 2015 (UTC)[reply]

I was curious enough to plot the semi-major axis circles, and it makes me wonder how stable this system is considering some of the eccentricities: https://farm8.staticflickr.com/7308/16245011907_e7ee015ed8_o.png
24.79.36.94 (talk) 22:46, 2 February 2015 (UTC)[reply]

Binary star or not?[edit]

Discovery paper refers that this star has an M-dwarf companion. Does the paper tell if that's an optical double star or a gravitationally bound binary? --Artman40 (talk) 13:37, 28 January 2015 (UTC)[reply]

https://www.astro.up.pt/investigacao/conferencias/toe2014/files/tcampante.pdf

page 6

looks like it's a triple systemJSon94 (talk) 06:00, 2 February 2015 (UTC)[reply]

Tidal locking?[edit]

Does anyway know if these planets are all likely to be locked with one phase to the star?JSon94 23:44, 2 February 2015 (UTC)[reply]

^ Cite error: The named reference EX-20150127 was invoked but never defined (see the help page).

[SP-20150127-1] Wall, Mike (27 January 2015). "Found! 5 Ancient Alien Planets Nearly As Old As the Universe". Space.com. Retrieved 27 January 2015.

[EX-20150127-2] Cite error: The named reference EX-20150127 was invoked but never defined (see the help page).

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