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240 G. Aqr, HD221308, HIP116060

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

HIP116060 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD221308. The Id of the star in the Gould Star Catalogue is 240. 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 240 G. Aqr

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 240 G. Aqr, the location is 23h 31m 01.15 and -06d 17` 16.8 .

Proper Motion of 240 G. Aqr

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 -28.67 ± 0.41 miliarcseconds/year towards the north and -10.10 ± 0.48 miliarcseconds/year east if we saw them in the horizon. The Radial Velocity, that is the speed at which the star is moving away/towards us is 13.30000 km/s with an error of about 0.40 km/s .

Physical Properties (Colour, Temperature, Radius) of 240 G. Aqr

240 G. Aqr has a spectral type of K0. This means the star is a orange to red star. The star has a B-V Colour Index of 1.25 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,476 Kelvin.

240 G. Aqr Radius has been calculated as being 60.98 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 42,426,463.53.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 37.77. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

240 G. Aqr Apparent and Absolute Magnitudes

240 G. Aqr has an apparent magnitude of 6.39 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 -2.97 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.93. 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 240 G. Aqr

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 1.34 which gave the calculated distance to 240 G. Aqr as 2434.05 light years away from Earth or 746.27 parsecs. It would take a spaceship travelling at the speed of light, 2434.05 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 2.17 which put 240 G. Aqr at a distance of 1503.06 light years or 460.83 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.

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.

240 G. Aqr Facts

Alternative Names

Traditional/Proper Name240 G. Aqr
Hipparcos Library I.D.116060
Bonner DurchmusterungBD-07 6036
Gould I.D.240
Henry Draper Designation221308

Visual Facts

Star Type star
Absolute Magnitude-2.97 / -1.93
Visual / Apparent Magnitude6.39
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)23h 31m 01.15
Declination (Dec.)-06d 17` 16.8
Galactic Latitude-61.72 degrees
Galactic Longitude76.78 degrees
1997 Distance from Earth1.34 Parallax (milliarcseconds)
 2434.05 Light Years
 746.27 Parsecs
2007 Revised Distance from Earth2.17 Parallax (milliarcseconds)
 1503.06 Light Years
 460.83 Parsecs
Proper Motion Dec.-28.67 ± 0.41 milliarcseconds/year
Proper Motion RA.-10.10 ± 0.48 milliarcseconds/year
B-V Index1.25
Radial Velocity13.30 ± 0.40 km/s
Spectral TypeK0
Colour(K) Orange to Red

Estimated Facts

Calculated Effective Temperature4,476 Kelvin

Sources and Links

SIMBAD SourceLink

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