h4 Luminosity (solar units) 00 H-R DIAGRAM Graphing Actuvity Name: mirocle illiams Instructions: Plot each star's luminosity vs. surface temperature, then record its spectral class in the table. Luminosity is given in solar units, meaning a star that is 100 times brighter than the sun will have a luminosity of 100 solar units. 12-6-21 Surface Star Name Temperature (K) Luminosity (solar units) Spectral Class 100 000 Sol (Sun) 5800 10 000 Deneb / 9900 60 000 B Rigel 12000 100 000 Barnard's Star 2800 0.0005 1000 Alpha Centauri A 5800 1.5 Alpha Centauri B 4200 0.33 100 Alpha Centauri C 0.0001 2800 Procyon A 6500 7.3 10 Procyon B 7400 0.0006 Betelgeuse 3200 17 000 Vega 10 700 55 Spica 21 000 2800 Fomalhaut 9500 14 0.1 Arcturus 4500 110 Sirius A 10 400 23 0.01 Sirius B 10 700 0.0024 Aldebaran 4200 100 3400 5000 0.001 Antares 21 000 2800 Beta Centauri Van Maanen's 6200 0.0002 0.0001 Star Spectral O Class AFGK M 8000 11 Altair 4500 0.3 3500 Epsilon Eridani 7500 6000 5000 OMichelle Broseau, Mn. Brosea's Br 30 000 10 000 Surface Temperature (K)

h4 Luminosity (solar units) 00 H-R DIAGRAM Graphing Actuvity Name: mirocle illiams Instructions: Plot each star's luminosity vs. surface temperature, then record its spectral class in the table. Luminosity is given in solar units, meaning a star that is 100 times brighter than the sun will have a luminosity of 100 solar units. 12-6-21 Surface Star Name Temperature (K) Luminosity (solar units) Spectral Class 100 000 Sol (Sun) 5800 10 000 Deneb / 9900 60 000 B Rigel 12000 100 000 Barnard's Star 2800 0.0005 1000 Alpha Centauri A 5800 1.5 Alpha Centauri B 4200 0.33 100 Alpha Centauri C 0.0001 2800 Procyon A 6500 7.3 10 Procyon B 7400 0.0006 Betelgeuse 3200 17 000 Vega 10 700 55 Spica 21 000 2800 Fomalhaut 9500 14 0.1 Arcturus 4500 110 Sirius A 10 400 23 0.01 Sirius B 10 700 0.0024 Aldebaran 4200 100 3400 5000 0.001 Antares 21 000 2800 Beta Centauri Van Maanen's 6200 0.0002 0.0001 Star Spectral O Class AFGK M 8000 11 Altair 4500 0.3 3500 Epsilon Eridani 7500 6000 5000 OMichelle Broseau, Mn. Brosea's Br 30 000 10 000 Surface Temperature (K)