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AN Antliae

AN Antliae Facts

AN Antliae's Alternative Names

HIP46845 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD82726.

AN Antliae has alternative name(s) :- AN Ant, AN Ant.

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

Location of AN Antliae

The location of the subgiant 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 object is compared to the celestial equator and is expressed in degrees. For AN Antliae, the location is 09h 32m 44.35 and -37° 13` 34.6 .

Proper Motion of AN Antliae

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 -17.30 ± 0.50 milliarcseconds/year towards the north and -11.36 ± 0.72 milliarcseconds/year east if we saw them in the horizon. . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

Physical Properties (Colour, Temperature, Age) of AN Antliae

AN Antliae Colour and Temperature

AN Antliae has a spectral type of F0/F2IV. This means the star is a yellow to white subgiant star. The star has a B-V Colour Index of 0.4 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 6,728 Kelvin.

AN Antliae Radius

Radius has been calculated as being 4.98 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 3,464,248.14.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 5.29. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures. The star's Iron Abundance is 0.02 with an error value of 9.99 Fe/H with the Sun has a value of 1 to put it into context.

The stars age according to Hipparcos data files put the star at an age of about 0.40 Billion years old but could be between 0.30 and 0.50 Billion years old. In comparison, the Sun's age is about 4.6 Billion Years Old.

AN Antliae Apparent and Absolute Magnitudes

AN Antliae has an apparent magnitude of 8.23 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 0.70 If you used the 2007 Parallax value, you would get an absolute magnitude of 0.57. 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 AN Antliae

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 3.12 which gave the calculated distance to AN Antliae as 1045.40 light years away from Earth or 320.51 parsecs. If you want that in miles, it is 6,521,746,989,009,885.84.

In 2007, Hipparcos data was revised with a new parallax of 2.94 which put AN Antliae at a distance of 1109.40 light years or 340.14 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.

Using the 2007 distance, the star is roughly 70,158,422.33 Astronomical Units from the Earth/Sun give or take a few. An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun.

Time to Travel to AN Antliae

A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

If you were to drive there at about 120 m.p.h. in a car with an infinity engine so you didn't have to pull over for petrol, it would take you 51,212,624,709,384.46 hours or 5,846,190,035.32 years.

At the time of writing, the fastest probe so far created is the New Horizon probe which is travelling at a speed of 33,000 m.p.h. If the probe was travelling to AN Antliae then it would take 186,227,726,215.94 hours / 21,258,872.86 years to get there. Speed Ref: N.A.S.A.

It would to take a spaceship journey travelling at the speed of light, 1045.40 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of AN Antliae

The star is a eclipsing binary sys Beta Lyrae (Sheliak) 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. AN Antliae brightness ranges from a magnitude of 8.411 to a magnitude of 8.306 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 3.7 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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Additional AN Antliae Facts and Figures

Visual Facts

Primary / Proper / Traditional NameAN Antliae
Alternative NamesAN Ant, HD 82726, HIP 46845, AN Ant
Spectral TypeF0/F2IV
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeSubgiant Star
ColourYellow - White
GalaxyMilky Way
Age0.40 Billion Years Old
Age Range0.30 - 0.50 Billion Years Old
Absolute Magnitude 0.70 / 0.57
Visual / Apparent Magnitude8.23
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)09h 32m 44.35
Declination (Dec.)-37° 13` 34.6
Galactic Latitude10.53 degrees
Galactic Longitude264.80 degrees
1997 Distance from Earth3.12 Parallax (milliarcseconds)
 1045.40 Light Years
 320.51 Parsecs
2007 Distance from Earth2.94 Parallax (milliarcseconds)
 1109.40 Light Years
 340.14 Parsecs
 70,158,422.33 Astronomical Units
Proper Motion Dec.-17.30 ± 0.50 milliarcseconds/year
Proper Motion RA.-11.36 ± 0.72 milliarcseconds/year
B-V Index0.40
Iron Abundance0.02 ± 9.99 Fe/H

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassEclipsing binary sys
Variable Star TypeBeta Lyrae (Sheliak)
Mean Variability Period in Days3.681
Variable Magnitude Range (Brighter - Dimmer)8.306 - 8.411

Estimated Calculated Facts

Radius (x the Sun)5.29
Effective Temperature6,728 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

Comments and Questions

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