Universe Guide


36 Aquilae - HD183630 - HIP95937

36 Aquilae is a red giant star that can be located in the constellation of Aquila. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

HIP95937 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD183630. The Id of the star in the Gould Star Catalogue is 54. 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.

36 Aquilae has alternative name(s), 36 Aquilae , NSV_12093, 36 Aql.

Location of 36 Aquilae

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 36 Aquilae, the location is 19h 30m 39.82 and -02d47`19.9 .

Proper Motion of 36 Aquilae

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 -10.63 ± 0.16 miliarcseconds/year towards the north and 20.64 ± 0.30 miliarcseconds/year east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Radius) of 36 Aquilae

36 Aquilae has a spectral type of M1IIIvar. This means the star is a red giant star. The star is 7270.00000000 Parsecs from the Galactic Centre or terms of Light Years is 23712.0751088000000000s. The star has a B-V Colour Index of 1.77 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 3,126 Kelvin.

36 Aquilae Radius has been calculated as being 48.41 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 33,683,624.47.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 50.93. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

36 Aquilae Apparent and Absolute Magnitudes

36 Aquilae has an apparent magnitude of 5.03 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 -0.91 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.02. 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 36 Aquilae

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 6.49 which gave the calculated distance to 36 Aquilae as 502.56 light years away from Earth or 154.08 parsecs. It would take a spaceship travelling at the speed of light, 502.56 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 6.17 which put 36 Aquilae at a distance of 528.63 light years or 162.07 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 7,270.00 Parsecs or 23,712.08 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*. 36 Aquilae brightness ranges from a magnitude of 5.000 to a magnitude of 5.000 over its variable period. The smaller the magnitude, the brighter the star.

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.

36 Aquilae Facts

Alternative Names

Traditional/Proper Name36 Aquilae
Short NameNSV 12093, 36 Aql
Alternative Name(s)36 Aquilae
Hipparcos Library I.D.95937
Bonner DurchmusterungBDD-03 4612
Gould I.D.54
Henry Draper Designation183630

Visual Facts

Star Typegiant star
Absolute Magnitude-0.91 / -1.02
Visual / Apparent Magnitude5.03
Naked Eye VisibleYes - Ref: Wiki
Right Ascension (R.A.)19h 30m 39.82
Declination (Dec.)-02d47`19.9
Galactic Latitude-10.00 degrees
Galactic Longitude34.93 degrees
1997 Distance from Earth6.49 Parallax (milliarcseconds)
 502.56 Light Years
 154.08 Parsecs
2007 Revised Distance from Earth6.17 Parallax (milliarcseconds)
 528.63 Light Years
 162.07 Parsecs
Galacto-Centric Distance23,712.08 Light Years / 7,270.00 Parsecs
Proper Motion Dec.-10.63 ± 0.16 milliarcseconds/year
Proper Motion RA.20.64 ± 0.30 milliarcseconds/year
B-V Index1.77
Radial Velocity-10.38 ± 0.55 km/s
Spectral TypeM1IIIvar
Colour(M) Red

Variable Star Details

Estimated Facts

Calculated Effective Temperature3,126 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

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