Universe Guide

8 Lacertae B (Companion Star) Facts

8 Lacertae B Facts

8 Lacertae B's Alternative Names

The Id of the star in the Yale Bright Star Catalogue is HR8603. HIP111544 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD214168.

Flamsteed designations are named after the creator, Sir John Flamsteed. Sir John numbered the stars in the constellation with a number and the latin name, this star's Flamsteed designation is 8 Lacertae B with it shortened to 8 Lac B.

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+38 4808A.

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

Location of 8 Lacertae B

The location of the main sequence 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 8 Lacertae B, the location is 22h 35m 52.10 and +39° 37` 41.4 .

Physical Properties (Colour, Temperature) of 8 Lacertae B

8 Lacertae B Colour and Temperature

8 Lacertae B has a spectral type of B2V. This means the star is a blue main sequence star. The star has a B-V Colour Index of -0.14 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 13,196 Kelvin.

8 Lacertae B Radius

Radius has been calculated as being 0.66 times bigger than the Sun. The Sun's radius is 695,800km, therefore the star's radius is an estimated 457,595.68.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.

8 Lacertae B Apparent and Absolute Magnitudes

8 Lacertae B has an apparent magnitude of 6.60 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 2.17 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 8 Lacertae B

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 12.92 which gave the calculated distance to 8 Lacertae B as 252 light years away from Earth or 77 parsecs. If you want that in miles, it is 168,995,390,508.

Travel Time to 8 Lacertae B

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 A380736229,613,302.00
Speed of Sound (Mach 1)767.269220,255,725.00
Concorde (Mach 2)1,534.54110,127,719.00
New Horizons Probe33,0005,121,072.00
Speed of Light670,616,629.00252.00

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 8 Lacertae B Facts and Figures

Visual Facts

Primary / Proper / Traditional Name8 Lacertae B
Alternative NamesHD 214168, HIP 111544, HR 8603, 8 Lac B, BD+38 4808A
Spectral TypeB2V
Constellation's Main StarNo
Multiple Star SystemYes
Star Type Main Sequence Dwarf Star
GalaxyMilky Way
Absolute Magnitude 2.17
Visual / Apparent Magnitude6.60
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)22h 35m 52.10
Declination (Dec.)+39° 37` 41.4
Galactic Latitude-16.15 degrees
Galactic Longitude96.37 degrees
Distance from Earth12.92 Parallax (milliarcseconds)
 252 Light Years
 77 Parsecs
 15,882,279.41 Astronomical Units
B-V Index-0.14
Radial Velocity-11.70 ± 0.90 km/s
Associated / Clustered Stars8 Lacertae

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Estimated Calculated Facts

Radius (x the Sun)0.66
Effective Temperature13,196 Kelvin

Sources and Links

SIMBAD SourceLink

Multi-Star System

The star has been identified as being a multi-star system, one in which there is at least one star in close orbit to another star or two or more stars orbiting a central point. The stars may be of equal mass, unequal mass where one star is stronger than the other or be in groups orbiting a central point which doesn't necessarily have to be a star. More information can be found on my dedicated multiple star systems page. The source of the info is Simbad. The file is dated 2000 so any differences between this and any other source will be down to the actual source from where the information came from.

Proper Motion mas/yr
H.D. IdB.D. IdStar CodeMagnitudeR.A.Dec.SpectrumColourYear
+38 4810.0D9.30000-5.00000-2.000001902

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