Universe Guide

CW Serpentis

CW Serpentis Facts

CW Serpentis's Alternative Names

HIP77798 is the reference name for the star in the Hipparcos Star Catalogue.

CW Serpentis has alternative name(s) :- CW Ser, CW Ser.

More details on objects' alternative names can be found at Star Names .

Location of CW Serpentis

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 Serpentis, the location is 15h 53m 09.79 and +06° 05` 26.0 .

Physical Properties (Colour, Temperature) of CW Serpentis

CW Serpentis Colour and Temperature

CW Serpentis has a spectral type of A/F. This means the star is a blue - white variable star. The star has a B-V Colour Index of 0.19 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 7,480 Kelvin.

CW Serpentis Apparent and Absolute Magnitudes

CW Serpentis 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 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.

Distance to CW Serpentis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -2.77 which gave the calculated distance to CW Serpentis as -1177.48 light years away from Earth or -361.01 parsecs. It would take a spaceship travelling at the speed of light, -1177.48 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of CW Serpentis

The star is a pulsating Delta Scuti 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. CW Serpentis brightness ranges from a magnitude of 12.214 to a magnitude of 11.737 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.2 days (variability).

Source of Information

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.

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Additional CW Serpentis Facts and Figures

Visual Facts

Primary / Proper / Traditional NameCW Serpentis
Alternative NamesCW Ser, HIP 77798, CW Ser
Spectral TypeA/F
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
GalaxyMilky Way
Visual / Apparent Magnitude11.98
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)15h 53m 09.79
Declination (Dec.)+06° 05` 26.0
Galactic Latitude42.02 degrees
Galactic Longitude15.40 degrees
Distance from Earth-2.77 Parallax (milliarcseconds)
 -1177.48 Light Years
 -361.01 Parsecs
 -74,463,138.84 Astronomical Units
B-V Index0.19

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeDelta Scuti
Mean Variability Period in Days0.189
Variable Magnitude Range (Brighter - Dimmer)11.737 - 12.214

Estimated Calculated Facts

Effective Temperature7,480 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

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