HIP31361 is the reference name for the star in the Hipparcos Star Catalogue.
BB Geminorum has alternative name(s) :- BB Gem, BB Gem.
More details on objects' alternative names can be found at Star Names .
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 Geminorum, the location is 06h 34m 35.29 and +13° 04` 44.7 .
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||BB Geminorum|
|Alternative Names||BB Gem, HIP 31361, BB Gem|
|Constellation's Main Star||No|
|Multiple Star System||No / Unknown|
|Star Type||Variable Star|
|Visual / Apparent Magnitude||11.84|
|Naked Eye Visible||Requires a 4.5 - 6 Inch Telescope - Magnitudes|
|Right Ascension (R.A.)||06h 34m 35.29|
|Declination (Dec.)||+13° 04` 44.7|
|Galactic Latitude||2.26 degrees|
|Galactic Longitude||199.39 degrees|
|Distance from Earth||-6.20 Parallax (milliarcseconds)|
|-526.07 Light Years|
|-33,268,218.78 Astronomical Units|
|Radial Velocity||64.50 ± 0.70 km/s|
|Variable Star Class||Pulsating|
|Variable Star Type||Delta Cepheid|
|Mean Variability Period in Days||2.308|
|Variable Magnitude Range (Brighter - Dimmer)||11.016 - 12.132|
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