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41 G. Ser Cap - HD145085 - HIP79120

41 G. Ser Cap is a orange to red giant star that can be located in the constellation of Serpens. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

HIP79120 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD145085. The Id of the star in the Gould Star Catalogue is 41 Cap. Stars in the southern hemisphere are more likely to have a Gould Id than the northern hemisphere. For example, there are no Gould classified stars in Ursa Major.

Location of 41 G. Ser Cap

The location of the star in the galaxy 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 41 G. Ser Cap, the location is 16h 08m 58.90 and +03d27`16.0 .

Proper Motion of 41 G. Ser Cap

All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving 11.70 ± 0.26 miliarcseconds/year towards the north and -37.56 ± 0.41 miliarcseconds/year east if we saw them in the horizon.

41 G. Ser Cap Luminosity

Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. The figure of 32.0000000 that I have given is based on the Spectral Types page that I have found on the Internet. You might find a different figure, one that may have been calculated rather than generalised that I have done. The figure is always the amount times the luminosity of the Sun. It is an imprecise figure because of a number of factors including but not limited to whether the star is a variable star and distance.

Physical Properties (Colour, Temperature, Radius) of 41 G. Ser Cap

41 G. Ser Cap has a spectral type of K5III. This means the star is a orange to red giant star. The star is 7307.00000000 Parsecs from the Galactic Centre or terms of Light Years is 23832.7555460800000000s. The star has a B-V Colour Index of 1.47 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,042 Kelvin.

41 G. Ser Cap Radius has been calculated as being 16.36 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 11,381,302.65.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 15.06. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

41 G. Ser Cap Apparent and Absolute Magnitudes

41 G. Ser Cap has an apparent magnitude of 5.93 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. If you used the 1997 Parallax value, you would get an absolute magnitude of 0.33 If you used the 2007 Parallax value, you would get an absolute magnitude of 0.51. 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 41 G. Ser Cap

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 7.58 which gave the calculated distance to 41 G. Ser Cap as 430.29 light years away from Earth or 131.93 parsecs. It would take a spaceship travelling at the speed of light, 430.29 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

In 2007, Hipparcos data was revised with a new parallax of 8.23 which put 41 G. Ser Cap at a distance of 396.31 light years or 121.51 parsecs. It should not be taken as though the star is moving closer or further away from us. It is purely that the distance was recalculated.

The star's Galacto-Centric Distance is 7,307.00 Parsecs or 23,832.76 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

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.

41 G. Ser Cap Facts

Alternative Names

Traditional/Proper Name41 G. Ser Cap
Hipparcos Library I.D.79120
Bonner DurchmusterungBDD+03 3132
Gould I.D.41 Cap
Henry Draper Designation145085

Visual Facts

Star Typegiant star
Absolute Magnitude0.33 / 0.51
Visual / Apparent Magnitude5.93
Naked Eye VisibleYes - Ref: Wiki
Right Ascension (R.A.)16h 08m 58.90
Declination (Dec.)+03d27`16.0
Galactic Latitude37.28 degrees
Galactic Longitude15.17 degrees
1997 Distance from Earth7.58 Parallax (milliarcseconds)
 430.29 Light Years
 131.93 Parsecs
2007 Revised Distance from Earth8.23 Parallax (milliarcseconds)
 396.31 Light Years
 121.51 Parsecs
Galacto-Centric Distance23,832.76 Light Years / 7,307.00 Parsecs
Proper Motion Dec.11.70 ± 0.26 milliarcseconds/year
Proper Motion RA.-37.56 ± 0.41 milliarcseconds/year
B-V Index1.47
Radial Velocity14.51 ± 0.29 km/s
Spectral TypeK5III
Colour(K) Orange to Red

Estimated Facts

Luminosity (x the Sun)32.0000000
Calculated Effective Temperature4,042 Kelvin

Sources and Links

SIMBAD SourceLink

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