Kepler-90

The planetary system Kepler-90 hosts at least 8 planets.

	System parameters
Primary system name	Kepler-90
Alternative system names	KOI-351, KIC 11442793
Right ascension	18 57 44.0383
Declination	+49 18 18.4958
Distance [parsec]	870±11
Distance [lightyears]	2836±36
Number of stars in system	1
Number of planets in system	8

Architecture of the system

This list shows all planetary and stellar components in the system. It gives a quick overview of the hierarchical architecture.

Kepler-90, stellar object
- Kepler-90 h, planet, semi-major axis: 1.01±0.11 AU
- Kepler-90 g, planet, semi-major axis: 0.71±0.08 AU
- Kepler-90 f, planet, semi-major axis: 0.48±0.09 AU
- Kepler-90 e, planet, semi-major axis: 0.42±0.06 AU
- Kepler-90 d, planet, semi-major axis: 0.32±0.05 AU
- Kepler-90 c, planet, semi-major axis: 0.089±0.012 AU
- Kepler-90 b, planet, semi-major axis: 0.074±0.016 AU
- Kepler-90 i, planet

Planets in the system

This table lists all planets in the system Kepler-90.

	Kepler-90 h	Kepler-90 g	Kepler-90 f	Kepler-90 e	Kepler-90 d	Kepler-90 c	Kepler-90 b	Kepler-90 i
Alternative planet names	KOI-351 h, KOI-351.01, KIC 11442793 h, 2MASS J18574403+4918185 h, Gaia DR2 2132193431285570304 h	KOI-351 g, KOI-351.02, KIC 11442793 g, 2MASS J18574403+4918185 g, Gaia DR2 2132193431285570304 g	KOI-351 f, KOI-351.07, KIC 11442793 f, 2MASS J18574403+4918185 f, Gaia DR2 2132193431285570304 f	KOI-351 e, KOI-351.04, KIC 11442793 e, 2MASS J18574403+4918185 e, Gaia DR2 2132193431285570304 e	KOI-351 d, KOI-351.03, KIC 11442793 d, 2MASS J18574403+4918185 d, Gaia DR2 2132193431285570304 d	KOI-351 c, KOI-351.05, KIC 11442793 c, 2MASS J18574403+4918185 c, Gaia DR2 2132193431285570304 c	KOI-351 b, KOI-351.06, KIC 11442793 b, 2MASS J18574403+4918185 b, Gaia DR2 2132193431285570304 b	KOI-351 i, KIC 11442793 i, 2MASS J18574403+4918185 i, Gaia DR2 2132193431285570304 i
Description	KOI-351 is the first seven planet system discovered by Kepler. It is somewhat similar to our own Solar System, but much more compact. Two independent groups have found the transits in the Kepler data, one of them being citizen scientists (PlanetHunters.org).	KOI-351 is the first seven planet system discovered by Kepler. It is somewhat similar to our own Solar System, but much more compact. Two independent groups have found the transits in the Kepler data, one of them being citizen scientists (PlanetHunters.org).	KOI-351 is the first seven planet system discovered by Kepler. It is somewhat similar to our own Solar System, but much more compact. Two independent groups have found the transits in the Kepler data, one of them being citizen scientists (PlanetHunters.org).	KOI-351 is the first seven planet system discovered by Kepler. It is somewhat similar to our own Solar System, but much more compact. Two independent groups have found the transits in the Kepler data, one of them being citizen scientists (PlanetHunters.org).	KOI-351 is the first seven planet system discovered by Kepler. It is somewhat similar to our own Solar System, but much more compact. Two independent groups have found the transits in the Kepler data, one of them being citizen scientists (PlanetHunters.org).	KOI-351 is the first seven planet system discovered by Kepler. It is somewhat similar to our own Solar System, but much more compact. Two independent groups have found the transits in the Kepler data, one of them being citizen scientists (PlanetHunters.org).	KOI-351 is the first seven planet system discovered by Kepler. It is somewhat similar to our own Solar System, but much more compact. Two independent groups have found the transits in the Kepler data, one of them being citizen scientists (PlanetHunters.org).	The planet Kepler-90 i was identified using machine learning. At the time of discovery, Kepler-90 was the extrasolar planetary system with the largest number of known planets.
Lists	Confirmed planets
Mass [M_jup]	< 1.2000	< 0.8000	N/A	N/A	N/A	N/A	N/A	N/A
Mass [M_earth]	< 381.3941	< 254.2627	N/A	N/A	N/A	N/A	N/A	N/A
Radius [R_jup]	1.01±0.09	0.72±0.07	0.26±0.05	0.24±0.03	0.26±0.03	0.106±0.013	0.117±0.015	0.118±0.019
Radius [R_earth]	11.3±1.0	8.1±0.8	2.9±0.5	2.7±0.3	2.9±0.3	1.19±0.14	1.31±0.17	1.3±0.2
Orbital period [days]	331.6006±0.0004	210.6070±0.0004	124.9144±0.0019	91.9391±0.0007	59.7367±0.0004	8.7194±0.0000	7.0082±0.0000	14.4491±0.0002
Semi-major axis [AU]	1.01±0.11	0.71±0.08	0.48±0.09	0.42±0.06	0.32±0.05	0.089±0.012	0.074±0.016	N/A
Eccentricity	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Equilibrium temperature [K]	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Discovery method	transit
Discovery year	2013	2013	2013	2013	2013	2013	2013	2017
Last updated [yy/mm/dd]	17/12/15

Stars in the system

This table lists all stars in the system Kepler-90.

	Kepler-90
Alternative star names	KOI-351, KIC 11442793, 2MASS J18574403+4918185, Gaia DR2 2132193431285570304
Mass [M_Sun]	1.20±0.10
Radius [R_Sun]	1.20±0.10
Age [Gyr]	0.5±0.9
Metallicity [Fe/H]	-0.12±0.18
Temperature [K]	6080+260−170
Spectral type	N/A
Visual magnitude	N/A

Planet sizes

The following plot shows the approximate sizes of the planets in this system The Solar System planets are shown as a comparison. Note that unless the radius has been determined through a transit observation, this is only an approximation (see Lissauer et al. 2011b).

Habitable zone

The following plot shows the approximate location of the planets in this system with respect to the habitable zone (green) and the size of the star (red). This is only an estimate, using the star's spectral type and mass. Note that if no green band is shown in the plot, then the planet's orbit is far outside the habitable zone. The equations of Selsis, Kasting et al are used to draw the inner and outer boundaries.

Scientific references and contributors

Links to scientific papers and other data sources

http://adsabs.harvard.edu/abs/2014ApJ...781...18C

https://arxiv.org/abs/1712.05044v1

http://simbad.u-strasbg.fr/simbad

http://arxiv.org/abs/1511.00643

This table lists all links which are relevant to this particular system. Note that this is just a summary. More references to the scientific publications and comments can be found in the commit messages. To see these, head over the github or click here to directly go to the git blame output of this system. In the left column of the output you can see the commit message corresponding to each parameter. It also lists the date of the last commit and the person making the changes. Within the commit message, you will find a link to the scientific publication where the data is taken from. Note that this is a new feature and not all system parameters might have a reference associated with it yet. Please help making this catalogue better and contribute data or references!

Open Exoplanet Catalogue contributors

Contributor	E-mail	Number of commits
Andrew Tribick	ajtribick(at)googlemail.com	2
Christian Sturm	Sol-d(at)users.noreply.github.com	1
Hanno Rein	hanno(at)hanno-rein.de	3
Ryan Varley	ryanjvarley(at)gmail.com	1

This table lists all people who have contributed to the Open Exoplanet Catalogue. Please consider contributing! Click here to find out how. You can also view all commits contributing to this file on github.

Data download

You can download the xml file corresponding to this planetary system, which is part of the Open Exoplanet Catalogue. All information on this page has been directly generated from this XML file. You can also download the entire catalogue over at github. If you prefer to download the dataset as an ASCII tables, you might find the oec_tables repository useful.

Corrections

If you spot an error or if you can contribute additional data to this entry, please send an e-mail to exoplanet@hanno-rein.de. Please include the corrected xml file and a reference to where the new data is coming from, ideally a scientific paper. If you are fluent with git and github, you can also create a pull request or open an issue on the Open Exoplanet Catalogue repository. Please include the reference to the relevant scientific paper in your commit message.

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