TRAPPIST-1

Astrophysics (Index)

About

TRAPPIST-1

(2MASS J23062928-0502285) (red dwarf with exoplanets within the habitable zone)

TRAPPIST-1 (2MASS J23062928-0502285) is a nearby red dwarf with seven known orbiting extra-solar planets, ranging from about 1/3 Earth mass to just above Earth mass, with possibly as many as six of them within the star's presumed habitable zone, which has encouraged much interest. They were discovered by a TRAPPIST telescope, which explains its designation. Stellar characteristics:

Aquarius - constellation.
23h06m29.368s - right ascension.
-05deg02m29.04s - declination.
+18.798 - apparent magnitude.
40.66 ly - distance.
M8V - spectral type.
0.0898 - mass(solar).
0.000553 - luminosity(solar).
0.1192 - radius(solar).

planet	M_E	R_E	orbital radius	orbital period	T_eq
TRAPPIST-1b	1.37	1.12	0.01154 AU	1.5 days	398 K
TRAPPIST-1c	1.31	1.10	0.01580 AU	2.4 days	340 K
TRAPPIST-1d	0.39	0.77	0.02227 AU	4 days	286 K
TRAPPIST-1e	0.69	0.92	0.02925 AU	6 days	250 K
TRAPPIST-1f	1.04	1.05	0.03849 AU	9 days	218 K
TRAPPIST-1g	1.32	1.13	0.04683 AU	12 days	197 K
TRAPPIST-1h	0.33	0.78	0.06189 AU	19 days	172 K

(star,exoplanets,red dwarf) Further reading:
https://en.wikipedia.org/wiki/TRAPPIST-1
https://simbad.u-strasbg.fr/simbad/sim-id?Ident=TRAPPIST-1
http://www.spitzer.caltech.edu/images/6294-ssc2017-01h-The-TRAPPIST-1-Habitable-Zone
http://www.openexoplanetcatalogue.com/planet/TRAPPIST-1%20e/
https://ui.adsabs.harvard.edu/abs/2016Natur.533..221G/abstract
https://ui.adsabs.harvard.edu/abs/2017Natur.542..456G/abstract

Redshift	Parsecs /Distance	Lightyears /Lookback Years
~0	12.5pc	40.7ly		TRAPPIST-1

Coordinates:

TRAPPIST-1
J230629.368-050229.04

Referenced by pages:
M dwarf
M-type star (M)
red dwarf
solar system
TRAPPIST
ultracool dwarf

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