The Gliese ID of the star is GL 317. The star was part of the original catalogue devised by German Astronomer Wilheim Gliese of stars located within 20 parsecs of Earth. Star Names
More details on objects' alternative names can be found at Star Names .
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 Gliese 317, the location is 08h 40m 59.24 and -23° 27` 23.3 .
All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving 794.00 milliarcseconds/year towards the north and -438.00 milliarcseconds/year east if we saw them in the horizon.
The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is 87.73 km/s . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.
Gliese 317 has a spectral type of M3.5V C. This means the star is a red main sequence star.
Gliese 317 has an apparent magnitude of 11.98 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 11.06 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.
The Parallax of the star is given as 65.30 which gives a calculated distance to Gliese 317 of 49.95 light years from the Earth or 15.31 parsecs. It would take a spaceship travelling at the speed of light, 49.95 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.
The star is roughly 3,157,892.18 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.
|Primary / Proper / Traditional Name||Gliese 317|
|Alternative Names||Gliese 317|
|Spectral Type||M3.5V C|
|Constellation's Main Star||No|
|Multiple Star System||No / Unknown|
|Star Type||Main Sequence Dwarf Star|
|Visual / Apparent Magnitude||11.98|
|Naked Eye Visible||Requires a 4.5 - 6 Inch Telescope - Magnitudes|
|Right Ascension (R.A.)||08h 40m 59.24|
|Declination (Dec.)||-23° 27` 23.3|
|Distance from Earth||65.30 Parallax (milliarcseconds)|
|49.95 Light Years|
|3,157,892.18 Astronomical Units|
|Proper Motion Dec.||794.00 milliarcseconds/year|
|Proper Motion RA.||-438.00 milliarcseconds/year|
|Radial Velocity||87.73 km/s|
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