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WASP-109 Facts

Location of WASP-109

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 WASP-109, the location is 15h 28m 13.00 and -16° 24` 39.00 .

Physical Properties (Colour, Metallicity, Age, Radius) of WASP-109

WASP-109 Colour and Temperature

WASP-109 has a spectral type of F4. This means the star is a blue to white star.

WASP-109 Radius

WASP-109 has been calculated as 1.35 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 936,546.80.km. If you need the diameter of the star, you just need to multiple the radius by 2.

The star's metallicity is 0.080000, this value is the fractional amount of the star that is not Hydrogen (X) or Helium (Y). An older star would have a high metallicity whereas a new star would have a lower one.

The star is believed to be about 2.60 Billion years old. To put in context, the Sun is believed to be about five billion years old and the Universe is about 13.8 billion years old.

WASP-109 Apparent and Absolute Magnitudes

WASP-109 has an apparent magnitude of 11.40 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied Parallax value, you would get an absolute magnitude of 3.81 Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number.

Distance to WASP-109

The Parallax of the star is given as 3.03 which gives a calculated distance to WASP-109 of 1076.34 light years from the Earth or 330.00 parsecs. It would take a spaceship travelling at the speed of light, 1076.34 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star is roughly 68,066,911.76 Astronomical Units from the Earth/Sun give or take a few. An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun.

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Additional WASP-109 Facts and Figures

Visual Facts

Primary / Proper / Traditional NameWASP-109
Spectral TypeF4
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
ColourYellow - White
GalaxyMilky Way
Age2.60 Billion Years Old
Visual / Apparent Magnitude11.40
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)15h 28m 13.00
Declination (Dec.)-16° 24` 39.00
Distance from Earth3.03 Parallax (milliarcseconds)
 1076.34 Light Years
 330.00 Parsecs
 68,066,911.76 Astronomical Units

Companions (Multi-Star and Exoplanets) Facts

Exoplanet Count1

Estimated Calculated Facts

Radius (x the Sun)1.35

Sources and Links


List of Extrasolar Planets orbiting WASP-109

NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastronInclination
WASP-109 bConfirmed0.133.3190.020140.046384.280

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