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AM Antliae

AM Antliae Facts

AM Antliae's Alternative Names

HIP46833 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD82692.

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

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

Location of AM Antliae

The location of the variable 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 AM Antliae, the location is 09h 32m 35.16 and -33° 59` 49.7 .

Proper Motion of AM 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 2.03 ± 0.69 miliarcseconds/year towards the north and -9.06 ± 1.11 miliarcseconds/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) of AM Antliae

AM Antliae has a spectral type of Ap Si. This means the star is a blue variable star. The star has a B-V Colour Index of 0 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 10,293 Kelvin.

AM Antliae Radius has been calculated as being 1.75 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,214,207.16.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 1.53. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

AM Antliae Apparent and Absolute Magnitudes

AM Antliae has an apparent magnitude of 9.34 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 1.13 If you used the 2007 Parallax value, you would get an absolute magnitude of 1.41. 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 AM Antliae

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.28 which gave the calculated distance to AM Antliae as 1430.54 light years away from Earth or 438.60 parsecs. It would take a spaceship travelling at the speed of light, 1430.54 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 2.59 which put AM Antliae at a distance of 1259.32 light years or 386.10 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 79,638,286.76 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. AM Antliae brightness ranges from a magnitude of 9.377 to a magnitude of 9.310 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 4.9 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 AM Antliae Facts and Figures

Visual Facts


Primary / Proper / Traditional NameAM Antliae
Alternative NamesAM Ant, HD 82692, HIP 46833, AM Ant
Spectral TypeAp Si
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
ColourBlue
GalaxyMilky Way
ConstellationAntlia
Absolute Magnitude 1.13 / 1.41
Visual / Apparent Magnitude9.34
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)09h 32m 35.16
Declination (Dec.)-33° 59` 49.7
Galactic Latitude12.84 degrees
Galactic Longitude262.49 degrees
1997 Distance from Earth2.28 Parallax (milliarcseconds)
 1430.54 Light Years
 438.60 Parsecs
2007 Distance from Earth2.59 Parallax (milliarcseconds)
 1259.32 Light Years
 386.10 Parsecs
 79,638,286.76 Astronomical Units
Proper Motion Dec.2.03 ± 0.69 milliarcseconds/year
Proper Motion RA.-9.06 ± 1.11 milliarcseconds/year
B-V Index0.00

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Mean Variability Period in Days4.891
Variable Magnitude Range (Brighter - Dimmer)9.310 - 9.377

Estimated Calculated Facts


Radius (x the Sun)1.53
Effective Temperature10,293 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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