38 G. Sagittarii is a blue giant star that can be located in the constellation of Sagittarius. The description is based on the spectral class. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.
HIP89086 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD166197.
The Gould star designation is one that was designed by American astronomer, Benjamin Apthorp Gould. Gould stars are predominantly in the Southern and Equatorial constellations but do appear in northern constellations such as Bootes and Orion. The star has the designation 38 G. Sagittarii. There are no stars with a Gould designation in Ursa Major for example.
More details on star alternative names can be found at Star Names .
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 star is compared to the celestial equator and is expressed in degrees. For 38 G. Sagittarii, the location is 18h 10m 55.35 and -33 ° 48` 00.2 .
38 G. Sagittarii has a spectral type of B2II/III. This means the star is a blue giant star. The star has a B-V Colour Index of -0.13 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 12,762 Kelvin.
38 G. Sagittarii has an apparent magnitude of 6.13 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 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.
Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.00 which gave the calculated distance to 38 G. Sagittarii as -1 light years away from Earth or -1 parsecs. It would take a spaceship travelling at the speed of light, -1 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.
The source of the information if it has a Hip I.D. is 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. The items in red are values that I've calculated so they could well be wrong. Information regarding Metallicity and/or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.
|38 G. Sagittarii|
|Alternative Names||HD 166197, HIP 89086|
|Multiple Star System||No / Unknown|
|Star Type||Giant Star|
|Visual / Apparent Magnitude||6.13|
|Naked Eye Visible||Yes - Magnitudes|
|Right Ascension (R.A.)||18h 10m 55.35|
|Declination (Dec.)||-33 ° 48` 00.2|
|Galactic Latitude||-7.10 degrees|
|Galactic Longitude||358.45 degrees|
|Distance from Earth||0.00 Parallax (milliarcseconds)|
|-1 Light Years|
|Radial Velocity||-25.00 ± 4.30 km/s|
|Calculated Effective Temperature||12,762 Kelvin|