HIP90115 is the reference name for the star in the Hipparcos Star Catalogue.
FR Scuti has alternative name(s) :- , FR Sct.
More details on objects' alternative names can be found at Star Names .
The location of the supergiant 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 FR Scuti, the location is 18h 23m 22.79 and -12° 40` 51.8 .
FR Scuti has a spectral type of M2.5Iabep +B. This means the star is a red supergiant star. The star has a B-V Colour Index of 1.64 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 3,659 Kelvin.
FR Scuti has an apparent magnitude of 9.79 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 -1.99 which gave the calculated distance to FR Scuti as -1639.01 light years away from Earth or -502.51 parsecs. It would take a spaceship travelling at the speed of light, -1639.01 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.
The star is a cataclysmic Symbiotic s of the Z variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted. FR Scuti brightness ranges from a magnitude of 10.058 to a magnitude of 9.643 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.4 days (variability).
|Primary / Proper / Traditional Name||FR Scuti|
|Alternative Names||HIP 90115, FR Sct|
|Spectral Type||M2.5Iabep +B|
|Constellation's Main Star||No|
|Multiple Star System||No / Unknown|
|Star Type||very luminous Supergiant Star|
|Visual / Apparent Magnitude||9.79|
|Naked Eye Visible||Requires a 7x50 Binoculars - Magnitudes|
|Right Ascension (R.A.)||18h 23m 22.79|
|Declination (Dec.)||-12° 40` 51.8|
|Galactic Latitude||0.34 degrees|
|Galactic Longitude||18.47 degrees|
|Distance from Earth||-1.99 Parallax (milliarcseconds)|
|-1639.01 Light Years|
|-103,649,405.55 Astronomical Units|
|Radial Velocity||42.20 ± 999.00 km/s|
|Variable Star Class||Cataclysmic|
|Variable Star Type||Symbiotic s of the Z|
|Mean Variability Period in Days||0.367|
|Variable Magnitude Range (Brighter - Dimmer)||9.643 - 10.058|
|Effective Temperature||3,659 Kelvin|