TYC 8998-760-1

The planetary system TYC 8998-760-1 hosts at least 2 planets.

	System parameters
Primary system name	TYC 8998-760-1
Alternative system names	2MASSJ13251211–6456207
Right ascension	13 25 12.1260
Declination	-64 56 20.6881
Distance [parsec]	94.6±0.3
Distance [lightyears]	308.5±1.0
Number of stars in system	1
Number of planets in system	2

Image

This image, captured by the SPHERE instrument on ESO's Very Large Telescope, shows the star TYC 8998-760-1 accompanied by two giant exoplanets, TYC 8998-760-1b and TYC 8998-760-1c. This is the first time astronomers have directly observed more than one planet orbiting a star similar to the Sun. The two planets are visible as two bright dots in the centre (TYC 8998-760-1b) and bottom right (TYC 8998-760-1c) of the frame, noted by arrows. Other bright dots, which are background stars, are visible in the image as well. By taking different images at different times, the team were able to distinguish the planets from the background stars. The image was captured by blocking the light from the young, Sun-like star (top-left of centre) using a coronagraph, which allows for the fainter planets to be detected. The bright and dark rings we see on the star's image are optical artefacts. Credit: ESO/Bohn et al.

Architecture of the system

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

TYC 8998-760-1, stellar object
- TYC 8998-760-1 b, planet, semi-major axis: 162.0 AU
- TYC 8998-760-1 c, planet, semi-major axis: 320 AU

Planets in the system

This table lists all planets in the system TYC 8998-760-1.

	TYC 8998-760-1 b	TYC 8998-760-1 c
Alternative planet names	2MASSJ13251211–6456207 b, Gaia DR2 5864061893213196032 b	2MASSJ13251211–6456207 c, Gaia DR2 5864061893213196032 c
Description	This is the first ever directly images system of a young, Sun-like star which is accompanied by two giant exoplanets. Until now astronomers had never directly observed more than one planet orbiting a star similar to the Sun. This system contains two gas giants orbit their host star at distances of 160 and about 320 times the Earth-Sun distance. Note that the inner object is at the upper mass boundary of what can be considered a planet and is therefore labeled as controversial.
Lists	Controversial	Confirmed planets
Mass [M_jup]	14±3	6.0±1.0
Mass [M_earth]	4450±953	1907±318
Radius [R_jup]	3.0+0.2−0.7	1.1+0.6−0.3
Radius [R_earth]	34+2−8	12+7−3
Orbital period [days]	N/A	N/A
Semi-major axis [AU]	162.0	320
Eccentricity	N/A	N/A
Equilibrium temperature [K]	1727+172−127	1240+160−170
Discovery method	imaging
Discovery year	2020
Last updated [yy/mm/dd]	20/07/22	20/07/20

Stars in the system

This table lists all stars in the system TYC 8998-760-1.

	TYC 8998-760-1
Alternative star names	2MASSJ13251211–6456207, Gaia DR2 5864061893213196032
Mass [M_Sun]	1.00±0.02
Radius [R_Sun]	N/A
Age [Gyr]	0.0167±0.0014
Metallicity [Fe/H]	N/A
Temperature [K]	4573±10
Spectral type	K3IV
Visual magnitude	11.13

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

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

https://exoplanetarchive.ipac.caltech.edu

https://www.eso.org/public/news/eso2011/

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
Hanno Rein	hanno(at)hanno-rein.de	6

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.

Catalogue

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