Universe Guide

RU Monocerotis

RU Monocerotis Facts

RU Monocerotis's Alternative Names

HIP33163 is the reference name for the star in the Hipparcos Star Catalogue.

RU Monocerotis has alternative name(s) :- RU Mon, RU 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-07 1623.

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

Location of RU Monocerotis

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 RU Monocerotis, the location is 06h 54m 12.32 and -07° 35` 45.0 .

Physical Properties (Colour, Temperature) of RU Monocerotis

RU Monocerotis Colour and Temperature

RU Monocerotis has a spectral type of B9pvar. This means the star is a blue 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.

RU Monocerotis Apparent and Absolute Magnitudes

RU Monocerotis has an apparent magnitude of 10.55 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 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 RU Monocerotis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -3.72 which gave the calculated distance to RU Monocerotis as -876.78 light years away from Earth or -268.82 parsecs. It would take a spaceship travelling at the speed of light, -876.78 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

Variable Type of RU Monocerotis

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. RU Monocerotis brightness ranges from a magnitude of 11.170 to a magnitude of 10.410 over its variable period. The smaller the magnitude, the brighter the star.

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 RU Monocerotis Facts and Figures

Visual Facts

Primary / Proper / Traditional NameRU Monocerotis
Alternative NamesRU Mon, HIP 33163, BD-07 1623, RU Mon
Spectral TypeB9pvar
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
GalaxyMilky Way
Visual / Apparent Magnitude10.55
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)06h 54m 12.32
Declination (Dec.)-07° 35` 45.0
Galactic Latitude-2.84 degrees
Galactic Longitude220.01 degrees
Distance from Earth-3.72 Parallax (milliarcseconds)
 -876.78 Light Years
 -268.82 Parsecs
 -55,447,718.85 Astronomical Units
B-V Index0.00
Radial Velocity39.00 ± 10.00 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassEclipsing
Variable Star TypeBeta Persei (Algol)/
Variable Magnitude Range (Brighter - Dimmer)10.410 - 11.170

Estimated Calculated Facts

Effective Temperature10,293 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

Comments and Questions

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