The Id of the star in the Henry Draper catalogue is HD187260.
More details on objects' alternative names can be found at Star Names .
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 Pi Aquilae B, the location is 19h 48m 42.152 and +11° 48` 56.76 .
All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving -13.80 miliarcseconds/year towards the north and 18.50 miliarcseconds/year east if we saw them in the horizon. . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.
Pi Aquilae B has a spectral type of A3V C. This means the star is a blue main sequence star.
|Primary / Proper / Traditional Name||Pi Aquilae B|
|Alternative Names||Pi Aql B, HD 187260|
|Spectral Type||A3V C|
|Constellation's Main Star||No|
|Multiple Star System||No / Unknown|
|Star Type||main sequence Dwarf Star|
|Right Ascension (R.A.)||19h 48m 42.152|
|Declination (Dec.)||+11° 48` 56.76|
|Proper Motion Dec.||-13.80 milliarcseconds/year|
|Proper Motion RA.||18.50 milliarcseconds/year|
|Associated / Clustered Stars||Pi Aquilae|
Pi Aquilae A
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