Universe Guide

115 G. Oph - HD156462 - HIP84649

115 G. Oph is a red giant star that can be located in the constellation of Ophiuchus. HIP is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD. The Id of the star in the Gould Star Catalogue is . Stars in the southern hemisphere are more likely to have a Gould Id than the northern hemisphere. For example, there are no Gould classified stars in Ursa Major.

Location of 115 G. Oph

The location of the star in the galaxy 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 from celestial equator. The Declination is how up or down compared to the celestial equator and is expressed in degrees. For 115 G. Oph, the location is 17h 18m 19.27 and -16 d 18`42.8 .

Physical Properties/View of 115 G. Oph

115 G. Oph has a spectral type of M0/M1III. This means the star is (M) red coloured (III) giant. 115 G. Oph lies at a distance of 805.34 light years away from our Sun and our planet Earth or to put it another way, 246.81 parsecs away from the Sun.

115 G. Oph has an apparent magnitude of 6.28 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. The stars temperature has been calculated at between 2400 and 3700 based on the Class Type and lookup at Wikipedia-Stellar Classification 115 G. Oph brightness ranges from a magnitude of 6.000 to a magnitude of 6.000 over its variable period. The smaller the magnitude, the brighter the star.

Source of Information

The source of the information came from Simbad, the Hipparcos data library based at the University at Strasbourg, France. Hipparcos was a E.S.A. satellite operation launched in 1989 for four years.

115 G. Oph Facts


Traditional Name115 G. Oph
Hipparcos Library I.D.84649
Gould I.D.115
Henry Draper Designation156462
Celestial TypeStar
Apparent Magnitude6.28
Right Ascension (R.A.)17h 18m 19.27
Declination (Dec.)-16 d 18`42.8
Distance from the Sun / Earth805.34 Light Years
Spectral TypeM0/M1III
Colour (M) red
Star Type (III) giant.
Variable Star ClassConstant, non-variable
Variable Magnitude Range (Brighter - Dimmer)6.000 - 6.000
Calculated Temperature Range2,400.00 - 3,700.00


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