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V385 Andromedae, HD220524, HIP115530

V385 Andromedae is a red eruptive star that can be located in the constellation of Andromeda. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

HIP115530 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD220524.

V385 Andromedae has alternative name(s), V385 And.

Location of V385 Andromedae

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 V385 Andromedae, the location is 23h 24m 08.88 and +41d 36` 46.3 .

Proper Motion of V385 Andromedae

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 2.46 ± 0.27 miliarcseconds/year towards the north and -12.02 ± 0.47 miliarcseconds/year east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Radius) of V385 Andromedae

V385 Andromedae has a spectral type of M0. This means the star is a red star. The star is 7480.00000000 Parsecs from the Galactic Centre or terms of Light Years is 24397.0181312000000000s. The star has a B-V Colour Index of 1.7 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 3,456 Kelvin.

V385 Andromedae Radius has been calculated as being 53.18 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 37,004,588.56.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 40.72. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

V385 Andromedae Apparent and Absolute Magnitudes

V385 Andromedae has an apparent magnitude of 6.37 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 -1.55 If you used the 2007 Parallax value, you would get an absolute magnitude of -0.97. 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 V385 Andromedae

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.61 which gave the calculated distance to V385 Andromedae as 1249.67 light years away from Earth or 383.14 parsecs. It would take a spaceship travelling at the speed of light, 1249.67 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 3.41 which put V385 Andromedae at a distance of 956.49 light years or 293.26 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 7,480.00 Parsecs or 24,397.02 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

Variable Type of V385 Andromedae

The star is a eruptive Irregular 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. V385 Andromedae brightness ranges from a magnitude of 6.468 to a magnitude of 6.359 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.1 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.

V385 Andromedae Facts

Alternative Names

Traditional/Proper NameV385 Andromedae
Short NameV385 And
Hipparcos Library I.D.115530
Bonner DurchmusterungBD+40 5065
Henry Draper Designation220524

Visual Facts

Star Type star
Absolute Magnitude-1.55 / -0.97
Visual / Apparent Magnitude6.37
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)23h 24m 08.88
Declination (Dec.)+41d 36` 46.3
Galactic Latitude-18.35 degrees
Galactic Longitude105.90 degrees
1997 Distance from Earth2.61 Parallax (milliarcseconds)
 1249.67 Light Years
 383.14 Parsecs
2007 Revised Distance from Earth3.41 Parallax (milliarcseconds)
 956.49 Light Years
 293.26 Parsecs
Galacto-Centric Distance24,397.02 Light Years / 7,480.00 Parsecs
Proper Motion Dec.2.46 ± 0.27 milliarcseconds/year
Proper Motion RA.-12.02 ± 0.47 milliarcseconds/year
B-V Index1.70
Radial Velocity-14.75 ± 0.28 km/s
Spectral TypeM0
Colour(M) Red

Variable Star Details

Variable Star ClassEruptive
Variable Star TypeIrregular
Mean Variability Period in Days0.094
Variable Magnitude Range (Brighter - Dimmer)6.359 - 6.468

Estimated Facts

Calculated Effective Temperature3,456 Kelvin

Sources and Links

SIMBAD SourceLink

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