Universe Guide


Trappist-1 Facts

  • Trappist-1 is a star that can be located in the constellation of Aquarius. The description is based on the spectral class.
  • Trappist-1 is not part of the constellation outline but is within the borders of the constellation.
  • The star can not be seen by the naked eye, you need a telescope to see it.
  • Trappist-1 has at least 7 Extrasolar Planets believed to be in orbit around the star.
  • Trappist-1 has a radius that is 0.12 times bigger than the Suns. Radius
  • The star is calculated at being about 39.30 light years away from us. Distance

Information on Trappist-1

Trappist-1 is the alternate, more familiar name to its real name. The real name is 2MASS J23062928-0502285. Its a small insignificant star in the cosmos, one you won't be able to see if you look up at the sky. It made the news in 2017 as it had the greatest number of exo-planets in orbit round any star, seven. No other system matches it yet.

The star is a small star compared to our Sun. The years on a planet are quick, you'll "age" far far quicker than you would here. A year is a matter of days with the sixth planet orbit its star in less than a week. Some of the planets are within the goldilocks zone which could herald possible life.

Such was N.A.S.A.'s excitement of the discovery that they have a dedicated website Trappist-1 on it. The reason for studying small stars is that they planets have a more noticeable pull on the star compared to giant star and therefore easier to detect. Its not to say that giant stars don't have planets orbiting them, they do, take for instance the star Aldebaran, it has a planet orbiting it.

Trappist-1's Alternative Names

Trappist-1 has alternative name(s) :- 2MASS J23062928-0502285.

More details on objects' alternative names can be found at Star Names .

Location of Trappist-1

The location of the star in the night sky is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the object is compared to the celestial equator and is expressed in degrees. For Trappist-1, the location is 23h 06m 29.28 and -05 ° 02` 28.5 .

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Additional Trappist-1 Facts and Figures

Visual Facts

Primary / Proper / Traditional NameTrappist-1
Alternative Names2MASS J23062928-0502285
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Star
GalaxyMilky Way
Visual / Apparent Magnitude18.80
Naked Eye VisibleRequires 8m Telescope - Magnitudes
Right Ascension (R.A.)23h 06m 29.28
Declination (Dec.)-05 ° 02` 28.5
Distance from Earth83.00000 Parallax (milliarcseconds)
 39.30 Light Years
 12.05 Parsecs
 2,485,473.60 Astronomical Units

Companions (Multi-Star and Exoplanets) Facts

Exoplanet Count7

Estimated Calculated Facts

Radius (x the Sun)0.12
Calculated Temperature Range0.00 - 0.00

Sources and Links


Location of Trappist-1 in Aquarius

Trappist-1 Location in Aquarius

The map was generated using Night Vision, an awesome free application by Brian Simpson.

List of Extrasolar Planets orbiting Trappist-1

NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastronInclination
TRAPPIST-1 bConfirmed0.00231.5110.020160.0111189.650
TRAPPIST-1 cConfirmed0.00192.4220.020160.0152189.670
TRAPPIST-1 dConfirmed0.000854.0500.020160.0214489.750
TRAPPIST-1 eConfirmed0.00186.1000.020170.0281789.860
TRAPPIST-1 fConfirmed0.000579.2070.020170.037189.680
TRAPPIST-1 gConfirmed0.002812.3530.020170.045189.710
TRAPPIST-1 hConfirmed20.00020170.06389.800

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