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V368 Normae, HD146003, HIP79754

V368 Normae is a red pulsating subgiant star that can be located in the constellation of Norma. The description is based on the spectral class. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

V368 Normae's Alternative Names

HIP79754 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD146003.

V368 Normae has alternative name(s) :- , V368 Nor.

More details on star alternative names can be found at Star Names .

Location of V368 Normae

The location of the 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 star is compared to the celestial equator and is expressed in degrees. For V368 Normae, the location is 16h 16m 43.27 and -53° 48` 40.0 .

Proper Motion of V368 Normae

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 -0.53 ± 0.23 miliarcseconds/year towards the north and 7.49 ± 0.43 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 -27.90000 km/s with an error of about 0.80 km/s .

Physical Properties (Colour, Temperature) of V368 Normae

V368 Normae has a spectral type of M2IV. This means the star is a red subgiant star. The star is 7,197.00 Parsecs from the Galactic Centre or terms of Light Years is 23,473.98 s. The star has a B-V Colour Index of 1.69 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 3,502 Kelvin.

V368 Normae Radius has been calculated as being 50.85 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 35,381,021.81.km. If you need the diameter of the star, you just need to multiple the radius by 2. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 49.01. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

V368 Normae Apparent and Absolute Magnitudes

V368 Normae has an apparent magnitude of 5.45 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 -1.51 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.43. 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 V368 Normae

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 4.05 which gave the calculated distance to V368 Normae as 805.34 light years away from Earth or 246.91 parsecs. It would take a spaceship travelling at the speed of light, 805.34 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 4.21 which put V368 Normae at a distance of 774.73 light years or 237.53 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 7,197.00 Parsecs or 23,473.98 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 V368 Normae

The star is a pulsating Semi-Regular Star which are giants or supergiants of intermediate and late spectral 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. V368 Normae brightness ranges from a magnitude of 5.544 to a magnitude of 5.430 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.

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V368 Normae Facts

Visual Facts

Primary / Proper / Traditional NameV368 Normae
Alternative NamesHD 146003, HIP 79754, V368 Nor
Spectral TypeM2IV
Multiple Star SystemNo / Unknown
Star TypeSubgiant Star
Colour red
GalaxyMilky Way
Absolute Magnitude-1.51 / -1.43
Visual / Apparent Magnitude5.45
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)16h 16m 43.27
Declination (Dec.)-53° 48` 40.0
Galactic Latitude-2.27 degrees
Galactic Longitude330.40 degrees
1997 Distance from Earth4.05 Parallax (milliarcseconds)
 805.34 Light Years
 246.91 Parsecs
2007 Distance from Earth4.21 Parallax (milliarcseconds)
 774.73 Light Years
 237.53 Parsecs
Galacto-Centric Distance23,473.98 Light Years / 7,197.00 Parsecs
Proper Motion Dec.-0.53 ± 0.23 milliarcseconds/year
Proper Motion RA.7.49 ± 0.43 milliarcseconds/year
B-V Index1.69
Radial Velocity-27.90 ± 0.80 km/s
Semi-Major Axis9895.00

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeSemi-Regular Star which are giants or supergiants of intermediate and late spectral
Mean Variability Period in Days0.101
Variable Magnitude Range (Brighter - Dimmer)5.430 - 5.544

Estimated Facts

Calculated Effective Temperature3,502 Kelvin

Sources and Links

SIMBAD SourceLink

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