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CW Sagittae

CW Sagittae Facts

CW Sagittae's Alternative Names

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 .

Location of CW Sagittae

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 .

Physical Properties (Colour) of CW Sagittae

CW Sagittae Colour and Temperature

CW Sagittae has a spectral type of F5. This means the star is a yellow to white variable star.

CW Sagittae Apparent and Absolute Magnitudes

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.

Distance to CW Sagittae

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).

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 Sagittae Facts and Figures

Visual Facts


Primary / Proper / Traditional NameCW Sagittae
Alternative NamesCW Sge, HIP 98430, CW Sge
Spectral TypeF5
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
ColourYellow - White
GalaxyMilky Way
ConstellationSagitta
Absolute Magnitude 3.18
Visual / Apparent Magnitude11.13
Naked Eye VisibleRequires 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 Longitude57.85 degrees
Distance from Earth2.57 Parallax (milliarcseconds)
 1269.12 Light Years
 389.11 Parsecs
 80,259,139.51 Astronomical Units
B-V Index-99.00

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Mean Variability Period in Days0.660
Variable Magnitude Range (Brighter - Dimmer)11.134 - 11.493

Sources and Links


SIMBAD SourceLink

Related Stars


Comments and Questions

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