Universe Guide
HomeAliensConstellationsTelevision and Films ListFact ListGames ListWarcraftSearchTwitterFacebook

AI Velorum, HD69213, HIP40330

AI Velorum is a blue to white pulsating variable star that can be located in the constellation of Vela. The description is based on the spectral class. The star can not be seen by the naked eye, you need a telescope to see it.

AI Velorum's Alternative Names

HIP40330 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD69213.

AI Velorum has alternative name(s) :- , AI Vel.

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

Location of AI Velorum

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 AI Velorum, the location is 08h 14m 05.12 and -44° 34` 33.1 .

Proper Motion of AI Velorum

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 31.82 ± 0.29 miliarcseconds/year towards the north and 27.24 ± 0.34 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 9.00000 km/s with an error of about 2.40 km/s .

AI Velorum 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 18.93 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.

Physical Properties (Colour, Temperature) of AI Velorum

AI Velorum has a spectral type of F2pvar. This means the star is a blue to white variable star. The star is 7,416.00 Parsecs from the Galactic Centre or terms of Light Years is 24,188.27 s. The star has a B-V Colour Index of 0.18 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 7,564 Kelvin.

AI Velorum Radius has been calculated as being 2.65 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,844,460.99.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 2.59. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

AI Velorum Apparent and Absolute Magnitudes

AI Velorum has an apparent magnitude of 6.56 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 1.56 If you used the 2007 Parallax value, you would get an absolute magnitude of 1.61. 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 AI Velorum

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 9.99 which gave the calculated distance to AI Velorum as 326.49 light years away from Earth or 100.10 parsecs. It would take a spaceship travelling at the speed of light, 326.49 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 10.21 which put AI Velorum at a distance of 319.45 light years or 97.94 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 7,416.00 Parsecs or 24,188.27 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 AI Velorum

The star is a pulsating Phenomenologically, these resemble DSCT (Delta Sct) s and are pulsating subdwarfs of the spherical component, or old disk galactic population, with spectral s in the range A2-F5 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. AI Velorum brightness ranges from a magnitude of 6.777 to a magnitude of 6.429 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.

Hide Explanations
Show GridLines

AI Velorum Facts

Visual Facts

Primary / Proper / Traditional NameAI Velorum
Alternative NamesHD 69213, HIP 40330, AI Vel
Spectral TypeF2pvar
Multiple Star SystemNo / Unknown
Star TypeVariable Star
Colour blue to white
GalaxyMilky Way
Absolute Magnitude1.56 / 1.61
Visual / Apparent Magnitude6.56
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)08h 14m 05.12
Declination (Dec.)-44° 34` 33.1
Galactic Latitude-5.53 degrees
Galactic Longitude260.89 degrees
1997 Distance from Earth9.99 Parallax (milliarcseconds)
 326.49 Light Years
 100.10 Parsecs
2007 Distance from Earth10.21 Parallax (milliarcseconds)
 319.45 Light Years
 97.94 Parsecs
Galacto-Centric Distance24,188.27 Light Years / 7,416.00 Parsecs
Proper Motion Dec.31.82 ± 0.29 milliarcseconds/year
Proper Motion RA.27.24 ± 0.34 milliarcseconds/year
B-V Index0.18
Radial Velocity9.00 ± 2.40 km/s
Semi-Major Axis7886.00
Stellar Luminosity (Lsun)18.93

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassPulsating
Variable Star TypePhenomenologically, these resemble DSCT (Delta Sct) s and are pulsating subdwarfs of the spherical component, or old disk galactic population, with spectral s in the range A2-F5
Mean Variability Period in Days0.112
Variable Magnitude Range (Brighter - Dimmer)6.429 - 6.777

Estimated Facts

Calculated Effective Temperature7,564 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

Add a Comment

Email: (Optional)