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WISE 1217+16 A

Primary Facts on WISE 1217+16 A

Location of WISE 1217+16 A

The location of the Cool Methane Dwarf 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 WISE 1217+16 A, the location is 12h 17m 57.00 and 16° 26` 40.00 .

Physical Properties (Colour, Age, Radius) of WISE 1217+16 A

WISE 1217+16 A has a spectral type of T8.5. This means the star is a brown Cool Methane Dwarf Star.

WISE 1217+16 A has been calculated as 0.09 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 63,317.80.km. If you need the diameter of the star, you just need to multiple the radius by 2.

The star is believed to be about 6.00 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.

WISE 1217+16 A Apparent and Absolute Magnitudes

WISE 1217+16 A has an apparent magnitude of 19.00 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 19.0 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 WISE 1217+16 A

The Parallax of the star is given as 100.00 which gives a calculated distance to WISE 1217+16 A of 32.62 light years from the Earth or 10 parsecs. It would take a spaceship travelling at the speed of light, 32.62 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star is roughly 2,062,633.69 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 WISE 1217+16 A Facts and Figures

Visual Facts


Primary / Proper / Traditional NameWISE 1217+16 A
Spectral TypeT8.5
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type Cool Methane Dwarf Star
Colour brown
GalaxyMilky Way
ConstellationComa Berenices
Age6.00 Billion Years Old
Visual / Apparent Magnitude19.00
Naked Eye VisibleRequires 8m Telescope - Magnitudes
Right Ascension (R.A.)12h 17m 57.00
Declination (Dec.)16° 26` 40.00
Distance from Earth100.00 Parallax (milliarcseconds)
 32.62 Light Years
 10 Parsecs
 2,062,633.69 Astronomical Units

Companions (Multi-Star and Exoplanets) Facts


Exoplanet Count1

Estimated Calculated Facts


Radius (x the Sun)0.09

Sources and Links


Sourcehttp://www.exoplanets.eu

List of Extrasolar Planets orbiting WISE 1217+16 A


NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastron
WISE 1217+16 A bConfirmed2.047400.00020127.6

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