The first column gives the current number, the second the name, the third the equatorial designation (αδ). It should be remembered that the first four figures give the hour and minutes in right ascension, the last two the declination, italics showing negative declination. The fourth column gives the galactic square, the fifth and sixth columns the galactic longitude and latitude. The seventh and eighth columns give the annual parallax and the corresponding distance expressed in siriometers. The ninth column gives the proper motion (μ), the tenth the radial velocity _W_ expressed in sir./st. (To get km./sec. we may multiply by 4.7375). The eleventh column gives the apparent visual magnitude, the twelfth column the absolute magnitude (_M_), computed from _m_ with the help of _r_. The 13th column gives the type of spectrum (_Sp_), and the last column the photographic magnitude (_m′_). The difference between _m′_ and _m_ gives the colour-index (_c_). TABLE 2. _THE APPARENTLY BRIGHTEST STARS._ +--+---------------------+----------+--------+-----+-------+-------+-------+ | 1| 2 | 3 | 4 | 5 | 6 | 7 | 8 | +--+---------------------+----------+--------+-----+-------+-------+-------+ | | | Position | Distance | | | _Name_ |----------+--------+-----+-------+-------+-------+ | | | (αδ) | Square | _l_ | _b_ | π | _r_ | +--+---------------------+----------+--------+-----+-------+-------+-------+ | | | | | | | | sir. | | 1|Sirius |(0640{16})| GD_7 | 195°| - 8° |0″.876 | 0.5 | | 2|Canopus |(0621{52})| GD_8 | 229 | -24 | 0.007 | 29.5 | | 3|Vega |(183338) | GC_2 | 30 | +17 | 0.094 | 2.2 | | 4|Capella |(050945) | GC_5 | 131 | + 5 | 0.066 | 3.1 | | 5|Arcturus |(141119) | GA_2 | 344 | +68 | 0.075 | 2.7 | | 6|α Centauri |(1432{60})| GD_10 | 284 | - 2 | 0.759 | 0.3 | | 7|Rigel |(0509{08})| GD_6 | 176 | -24 | 0.007 | 29.5 | | 8|Procyon |(073405) | GC_7 | 182 | +14 | 0.324 | 0.6 | | 9|Achernar |(0134{57})| GE_8 | 256 | -59 | 0.051 | 4.0 | |10|β Centauri |(1356{59})| GC_10 | 280 | + 2 | 0.037 | 5.6 | |11|Altair |(194508) | GD_1 | 15 | -10 | 0.238 | 0.9 | |12|Betelgeuze |(054907) | GD_6 | 168 | - 8 | 0.030 | 6.9 | |13|Aldebaran |(043016) | GD_5 | 149 | -19 | 0.078 | 2.8 | |14|Pollux |(073928) | GC_6 | 160 | +25 | 0.064 | 3.2 | |15|Spica |(1319{10})| GB_8 | 286 | +51 | .. | .. | |16|Antares |(1623{26})| GC_11 | 320 | +14 | 0.029 | 7.1 | |17|Fomalhaut |(2252{30})| GE_10 | 348 | -66 | 0.138 | 1.5 | |18|Deneb |(203844) | GC_2 | 51 | + 1 | ..