HIP33237 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD50846.
AU Monocerotis has alternative name(s) :- AU Mon, AU Mon.
BD number is the number that the star was filed under in the Durchmusterung or Bonner Durchmusterung, a star catalogue that was put together by the Bonn Observatory between 1859 to 1903. The star's BD Number is BD-01 1449.
More details on objects' alternative names can be found at Star Names .
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 object is compared to the celestial equator and is expressed in degrees. For AU Monocerotis, the location is 06h 54m 54.71 and -01° 22` 32.9 .
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 253.58 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.
AU Monocerotis has a spectral type of B5 + F0 EA. This means the star is a blue star. The star has a B-V Colour Index of 0.03 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 9,610 Kelvin.
Radius has been calculated as being 8.23 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 5,727,434.10.km. If you need the diameter of the star, you just need to multiple the radius by 2. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.
AU Monocerotis has an apparent magnitude of 8.36 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied Parallax value, you would get an absolute magnitude of -1.94 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.
Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.87 which gave the calculated distance to AU Monocerotis as 3749.00 light years away from Earth or 1149.43 parsecs. It would take a spaceship travelling at the speed of light, 3749.00 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.
The star's Galacto-Centric Distance is 8,053.00 Parsecs or 26,265.93 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.
The star is a eclipsing Beta Persei (Algol)/ 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. AU Monocerotis brightness ranges from a magnitude of 9.070 to a magnitude of 8.170 over its variable period. The smaller the magnitude, the brighter the star.
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.
|Primary / Proper / Traditional Name||AU Monocerotis|
|Alternative Names||AU Mon, HD 50846, HIP 33237, BD-01 1449, AU Mon|
|Spectral Type||B5 + F0 EA|
|Constellation's Main Star||No|
|Multiple Star System||No / Unknown|
|Visual / Apparent Magnitude||8.36|
|Naked Eye Visible||Requires a 7x50 Binoculars - Magnitudes|
|Right Ascension (R.A.)||06h 54m 54.71|
|Declination (Dec.)||-01° 22` 32.9|
|Galactic Latitude||0.15 degrees|
|Galactic Longitude||214.55 degrees|
|Distance from Earth||0.87 Parallax (milliarcseconds)|
|3749.00 Light Years|
|237,085,304.21 Astronomical Units|
|Galacto-Centric Distance||26,265.93 Light Years / 8,053.00 Parsecs|
|Radial Velocity||17.00 ± 2.50 km/s|
|Stellar Luminosity (Lsun)||253.58|
|Variable Star Class||Eclipsing|
|Variable Star Type||Beta Persei (Algol)/|
|Variable Magnitude Range (Brighter - Dimmer)||8.170 - 9.070|
|Radius (x the Sun)||8.23|
|Effective Temperature||9,610 Kelvin|
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