SPECTRAL CLASS and FEATURES
Spectral Class & Special features
| O | HeII lines visible; lines from highly ionized species, for example, CIII, NIII, OIII, SiIV ; H lines relatively weak; strong ultraviolet continuum |
| B | HeI lines strong; attain maxmimum at B2; HeII lines absent; H lines stronger; lower ions, for example, CII, OII, SiIII |
| A | H lines attain maxmimum strength at A0 and decrease toward later types; MgII, SiII strong; CaII weak and increasing in strength |
| F | H weaker, CaII stronger; lines of neutral atoms and first ions of metals appear prominently |
| G | Solar-type spectra; CaII lines extremely stron; neutral metals prominent, ions weaker; G band (CH) strong; H lines weakening |
| K | Neutral metallic lines dominate; H quite weak; molecular bands (CH,CN) developing; continuum weak in blue |
| M | Strong molecular bands, particularly TiO; some neutral lines for example, CaI quite strong; red continuum |
| C(R,N) | Carbon stars; strong bands of carbon compounds C ,CN,CO; TiO absent; temperatures in range of 2 classes K and M |
| S | Heavy-element stars; bands of ZrO, YO, LaO; neutral atoms strong as in classes K and M; overlaps these classes in temperature range |
| Ia-0 | Most extreme supergiants |
| Ia | Luminous supergiants |
| Iab | Moderate supergiants |
| Ib | Less luminous supergiants |
| II | Bright giants |
| III | Normal giants |
| IV | Subgiants |
| V | Dwarfs (main sequence) |
| VI | Subdwarf (below main sequence, extreme metal poor. ) |
| VII | White dwarfs |
| Star | Name | RA | Dec | m | M | Sp | L | R | µ | D | tms | h,m | d,m | mag | mag | Lo | Ro | Mo | millió év |
 And | Alpheratz | 00 07 | +28 58 | 2.06 | -0.1 | B9p | 93 | 3.1 | 5.0 | 90 | 500 |
| Ari | Hamal | 02 06 | +23 22 | 2.00 | +0.2 | K2III | 103 | 17 | 5.1 | 76 | 500 |
| UMi | Polaris | 02 12 | +89 11 | 1.99 | -4.6 | F8Ib | 1600 | 80 | 10 | 680 | 62 |
| ß Per | Algol | 03 07 | +40 52 | 2.06 | -0.5 | B8V | 132 | 3.2 | 4.5 | 105 | 340 |
| Per | Mirfak | 03 23 | +49 47 | 1.8 | -4.4 | F5Ib | 4800 | 55 | 14 | 570 | 29 |
 Tau | Alcyone | 03 46 | +24 03 | 2.9 | -3.2 | B7III | 1800 | 8.5 | 10.5 | 410 | 58 |
| Tau | Aldeberan | 04 35 | +16 28 | 0.86 | -1.2 | K5III | 150 | 4.5 | 4.5 | 68 | 300 |
| ß Ori | Rigel | 05 14 | -08 13 | 0.14 | -7.1 | B8Ia | 150000 | 80 | 42 | 900 | 3 |
| Aur | Capella | 05 15 | +45 59 | 0.05 | -0.6 | G8III | 75 | 1.2 | 3.8 | 45 | 500 |
 Ori | Bellatrix | 05 24 | +06 20 | 1.64 | -4.2 | B2III | 4000 | 6.5 | 14 | 470 | 3.5 |
| Ori | Betelgeuse | 05 54 | +07 24 | 0.41 | -5.6 | M2Ia | 13000 | 800 | 8.1 | 520 | 6.2 |
| Car | Canopus | 06 24 | -52 41 | -0.72 | -3.1 | F0Ib | 800 | 40 | 3.2 | 98 | 40 |
| CMa | Sirius | 06 44 | -16 42 | -1.47 | 1.45 | A1V | 23 | 2.3 | 2.7 | 8.6 | 1174 |
| Gem | Castor | 07 33 | +31 56 | 1.97 | 1.3 | A1V | 28 | 2.3 | 2.8 | 45 | 1000 |
| CMi | Procyon | 07 38 | +05 17 | 0.37 | 2.7 | F5IV | 7.6 | 2 | 1.8 | 11.3 | 2370 |
| ß Gem | Pollux | 07 44 | +28 05 | 1.16 | 1.0 | K0III | 30 | 16 | 2.9 | 35 | 950 |
| Hyd | Alphard | 09 26 | -08 35 | 1.98 | -0.3 | K4III | 114 | 162 | 4.4 | 94 | 385 |
| Leo | Regulus | 10 07 | +12 04 | 1.36 | -0.7 | B7V | 140 | 3 | 4.7 | 84 | 335 |
| UMa | Dubhe | 11 03 | +61 52 | 1.81 | -0.7 | K0III | 140 | * | 4.7 | 105 | 335 |
| ß Leo | Denebola | 11 48 | +14 41 | 2.14 | 1.5 | A3V | 21 | * | 2.6 | 42 | 1238 |
| CVn | CorCaroli | 12 55 | +38 26 | 2.90 | 0.1 | B9p | 77 | 3.6 | 3.9 | 118 | 500 |
| Vir | Spica | 13 24 | -11 03 | 0.91 | -3.3 | B1V | 1700 | 3 | 10.3 | 220 | 60 |
| Boo | Arcturus | 14 15 | +19 17 | -0.06 | -0.3 | K2III | 100 | 20 | 4.2 | 36 | 420 |
| Cen | Rigil Kent | 14 38 | -60 46 | 0.01 | 4.4 | G2V | 1.3 | 1 | 1.1 | 4.3 | 8500 |
| CrB | Alphecca | 15 34 | +26 47 | 2.23 | 0.4 | A0V | 120 | 3.6 | 4.5 | 76 | 375 |
| Sco | Antares | 16 28 | -26 23 | 0.92 | -5.1 | M1Ib | 9000 | 800 | 17.2 | 520 | 19 |
| Her | RasAlgethi | 17 14 | +14 24 | 3.10 | -2.3 | M5II | 700 | 800 | 7.9 | 410 | 112 |
| Oph | Rasalhague | 17 34 | +12 35 | 2.09 | 0.8 | A5III | 29 | 6.4 | 2.8 | 60 | 965 |
| Lyr | Vega | 18 36 | +38 46 | 0.04 | 0.5 | A0V | 50 | 2.5 | 3.4 | 27 | 680 |
| ß Cyg | Albireo | 19 30 | +27 55 | 3.07 | -2.4 | K3II | 800 | 59 | 8.1 | 410 | 100 |
| Aql | Altair | 19 50 | +08 49 | 0.77 | 2.2 | A7IV | 9.8 | 1.5 | 2 | 16.5 | 2000 |
| Cyg | Deneb | 20 41 | +45 12 | 1.26 | -7.1 | A2Ia | 100000 | 40 | 37 | 1600 | 3.7 |
| Cep | Alderamin | 21 18 | +62 31 | 2.44 | 1.4 | A7IV | 330 | 9.5 | 6.1 | 52 | 184 |
 Peg | Emif | 21 43 | +09 48 | 2.38 | -4.6 | K2Ib | 5900 | 140 | 15.1 | 780 | 25 |
| PsA | Fomalhaut | 22 57 | -29 44 | 1.15 | 2.0 | A3V | 12 | 2 | 2.2 | 22.6 | 1830 |
Az fenti táblázat tartalmazza az égbolt legfényesebb csillagainak
néhány állapotjelzõjét. Az oszlopok rendre:
(1-2) a csillag neve; (3-4)égi koordinátái;
(5-6) látszó és abszolut fényessége; (7) spektráltípusa;
(8) luminozitása; (9) rádiusza; (10) tömege; (11) távolsága;
(12) kora.
A Nap után legfényeseb csillagok adatai.
Az n-nel jelölt paraméterek nem ismertek.