Universe Guide

IW Comae Berenices

IW Comae Berenices Facts

  • IW Comae Berenices is a eruptive giant star that can be located in the constellation of Coma Berenices. The description is based on the spectral class.
  • IW Comae Berenices is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (M2III) of the star, the star's colour is red .
  • The star can not be seen by the naked eye, you need a telescope to see it.
  • The star is calculated at being about 2764.10 light years away from us. Distance

IW Comae Berenices's Alternative Names

HIP59889 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD106814.

IW Comae Berenices has alternative name(s) :- , IW Com.

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+28 2097.

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

Location of IW Comae Berenices

The location of the giant 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 IW Comae Berenices, the location is 12h 16m 56.61 and +27° 44` 23.1 .

Physical Properties of IW Comae Berenices

IW Comae Berenices Temperature and Colour

Based on the star's spectral type of M2III , IW Comae Berenices's colour and type is red giant star. The star has a B-V Colour Index of 1.51 which means the star's temperature is about 3,971 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

IW Comae Berenices Radius

IW Comae Berenices estimated radius has been calculated as being 42.18 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 29,349,739.78.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 rather than peer reviewed papers. It has been known to produce widely incorrect figures.

IW Comae Berenices Iron Abundance

IW Comae Berenices Iron Abundance is -1.42 with an error value of 9.99 Fe/H with the Sun has a value of 1 to put it into context. The value comes from the Hipparcos Extended Catalog.

IW Comae Berenices Apparent and Absolute Magnitudes

IW Comae Berenices has an apparent magnitude of 7.99 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 -1.65 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 IW Comae Berenices

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 1.18 which gave the calculated distance to IW Comae Berenices as 2764.10 light years away from Earth or 847.46 parsecs. If you want that in miles, it is about 16,249,108,394,016,816.40, based on 1 Ly = 5,878,625,373,183.61 miles.

Travel Time to IW Comae Berenices

The time it will take to travel to this star is dependent on how fast you are going. U.G. has done some calculations as to how long it will take going at differing speeds. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. Its primary mission was to visit Pluto which at the time of launch (2006), Pluto was still a planet.

DescriptionSpeed (m.p.h.)Time (years)
Airbus A3807362,518,548,130.73
Speed of Sound (Mach 1)767.2692,415,908,142.02
Concorde (Mach 2)1,534.541,207,952,496.66
New Horizons Probe33,00056,171,255.28
Speed of Light670,616,629.002,764.10

Variable Type of IW Comae Berenices

The star is a eruptive Irregular 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. IW Comae Berenices brightness ranges from a magnitude of 8.076 to a magnitude of 7.936 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.

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Additional IW Comae Berenices Facts and Figures

Visual Facts

Primary / Proper / Traditional NameIW Comae Berenices
Alternative NamesHD 106814, HIP 59889, BD+28 2097, IW Com
Spectral TypeM2III
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeGiant Star
GalaxyMilky Way
ConstellationComa Berenices
Absolute Magnitude -1.65
Visual / Apparent Magnitude7.99
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)12h 16m 56.61
Declination (Dec.)+27° 44` 23.1
Galactic Latitude82.32 degrees
Galactic Longitude206.38 degrees
Distance from Earth1.18 Parallax (milliarcseconds)
 2764.10 Light Years
 847.46 Parsecs
 174,799,954.68 Astronomical Units
B-V Index1.51
Radial Velocity-22.75 ± 0.29 km/s
Iron Abundance-1.42 ± 9.99 Fe/H

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassEruptive
Variable Star TypeIrregular
Mean Variability Period in Days0.122
Variable Magnitude Range (Brighter - Dimmer)7.936 - 8.076

Estimated Calculated Facts

Radius (x the Sun)42.18
Effective Temperature3,971 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

Comments and Questions

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