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WASP-77A Facts

Location of WASP-77A

The location of the main sequence 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-77A, the location is 02h 28m 37.01 and -07° 03` 38.16 .

Physical Properties (Colour, Metallicity, Age, Radius) of WASP-77A

WASP-77A Colour and Temperature

WASP-77A has a spectral type of G8V. This means the star is a white to yellow main sequence star.

WASP-77A Radius

WASP-77A has been calculated as 0.96 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 664,489.00.km. If you need the diameter of the star, you just need to multiple the radius by 2.

The star's metallicity is 0.110000, 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 1.00 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-77A Apparent and Absolute Magnitudes

WASP-77A has an apparent magnitude of 11.29 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 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.

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Additional WASP-77A Facts and Figures

Visual Facts

Primary / Proper / Traditional NameWASP-77A
Spectral TypeG8V
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Main Sequence Dwarf Star
ColourWhite to Yellow
GalaxyMilky Way
Age1.00 Billion Years Old
Visual / Apparent Magnitude11.29
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)02h 28m 37.01
Declination (Dec.)-07° 03` 38.16

Companions (Multi-Star and Exoplanets) Facts

Exoplanet Count1

Estimated Calculated Facts

Radius (x the Sun)0.96

Sources and Links


List of Extrasolar Planets orbiting WASP-77A

NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastronInclination
WASP-77 A bConfirmed0.061.36020120.02489.400

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