HIP98430 is the reference name for the star in the Hipparcos Star Catalogue.
CW Sagittae has alternative name(s) :- CW Sge, CW Sge.
More details on objects' alternative names can be found at Star Names .
The location of the variable 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 CW Sagittae, the location is 19h 59m 58.04 and +19° 10` 44.7 .
CW Sagittae has a spectral type of F5. This means the star is a blue to white variable star.
CW Sagittae has an apparent magnitude of 11.13 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 3.18 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 2.57 which gave the calculated distance to CW Sagittae as 1269.12 light years away from Earth or 389.11 parsecs. It would take a spaceship travelling at the speed of light, 1269.12 years to get there. We don't have the technology or spaceship that can carry people over that distance yet. CW Sagittae brightness ranges from a magnitude of 11.493 to a magnitude of 11.134 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.7 days (variability).
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.
|Primary / Proper / Traditional Name||CW Sagittae|
|Alternative Names||CW Sge, HIP 98430, CW Sge|
|Constellation's Main Star||No|
|Multiple Star System||No / Unknown|
|Star Type||Variable Star|
|Colour||Yellow - White|
|Visual / Apparent Magnitude||11.13|
|Naked Eye Visible||Requires a 4.5 - 6 Inch Telescope - Magnitudes|
|Right Ascension (R.A.)||19h 59m 58.04|
|Declination (Dec.)||+19° 10` 44.7|
|Galactic Latitude||-5.61 degrees|
|Galactic Longitude||57.85 degrees|
|Distance from Earth||2.57 Parallax (milliarcseconds)|
|1269.12 Light Years|
|80,259,139.51 Astronomical Units|
|Mean Variability Period in Days||0.660|
|Variable Magnitude Range (Brighter - Dimmer)||11.134 - 11.493|
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