Universe Guide

BB Herculis

BB Herculis Facts

  • BB Herculis is a pulsating variable star that can be located in the constellation of Hercules. The description is based on the spectral class.
  • BB Herculis is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (G5) of the star, the star's colour is yellow .
  • The star can not be seen by the naked eye, you need a telescope to see it.
  • The star is calculated at being about 11247.01 light years away from us. Distance

BB Herculis's Alternative Names

HIP92067 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD229414.

BB Herculis has alternative name(s) :- BB Her, BB Her.

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+12 3643.

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

Location of BB Herculis

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 BB Herculis, the location is 18h 45m 54.11 and +12° 20` 10.2 .

Physical Properties of BB Herculis

BB Herculis Temperature and Colour

Based on the star's spectral type of G5 , BB Herculis's colour and type is yellow variable star. The star has a B-V Colour Index of 1.12 which means the star's temperature is about 4,722 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

BB Herculis Radius

BB Herculis estimated radius has been calculated as being 46.63 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 32,446,031.59.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.

BB Herculis Apparent and Absolute Magnitudes

BB Herculis has an apparent magnitude of 10.07 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 -2.62 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 BB Herculis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.29000 which gave the calculated distance to BB Herculis as 11247.01 light years away from Earth or 3448.28 parsecs. If you want that in miles, it is about 66,116,958,358,449,793.51, based on 1 Ly = 5,878,625,373,183.61 miles.

Travel Time to BB Herculis

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 A38073610,247,869,473.55
Speed of Sound (Mach 1)767.2699,830,231,551.81
Concorde (Mach 2)1,534.544,915,109,369.93
New Horizons Probe33,000228,558,543.41
Speed of Light670,616,629.0011,247.01

Variable Type of BB Herculis

The star is a pulsating Delta Cepheid 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. BB Herculis brightness ranges from a magnitude of 10.567 to a magnitude of 9.985 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 7.5 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 BB Herculis Facts and Figures

Visual Facts

Primary / Proper / Traditional NameBB Herculis
Alternative NamesBB Her, HD 229414, HIP 92067, BD+12 3643, BB Her
Spectral TypeG5
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeVariable Star
GalaxyMilky Way
Absolute Magnitude -2.62
Visual / Apparent Magnitude10.07
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)18h 45m 54.11
Declination (Dec.)+12° 20` 10.2
Galactic Latitude6.80091202 degrees
Galactic Longitude43.33984095 degrees
Distance from Earth0.29000 Parallax (milliarcseconds)
 11247.01 Light Years
 3448.28 Parsecs
 711,253,850.00 Astronomical Units
B-V Index1.12
Radial Velocity88.40000 ± 0.30 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeDelta Cepheid
Mean Variability Period in Days7.507
Variable Magnitude Range (Brighter - Dimmer)9.985 - 10.567

Estimated Calculated Facts

Radius (x the Sun)46.63
Effective Temperature4,722 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

Comments and Questions

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