Contributors Dylan Beck WORKSHEET 1 Beta Persei A Algol A 1 2 3 4 5 6 7 8 9 1 0 11 1 2 Measurement Value B V Temperature Equation MV Color Magnitude Graph MV Graph and Calculated MV Agree Calculated Luminosity Radius Spectral Class Spectral Class Radius Graph 0 05 10795 07 0 19 0 2 No 101 88 2 89 B9 2 25 Graph and Calculated Radius Agree No Likely Luminosity Class Main Sequence Mass 3 3 WORKSHEET 2 Beta Persei B Algol B Measurement B V Temperature Equation MV Color Magnitude Graph MV Graph and Calculated MV Agree Calculated Luminosity Radius Spectral Class Spectral Class Radius Graph 1 12 4471 94 2 90 1 0 Yes 5 92 4 06 K5 0 8 1 0 11 Graph and Calculated Radius Agree No Likely Luminosity Class Giant 1 2 Mass Cannot Be Determined 1 2 3 4 5 6 7 8 9 Value WORKSHEET 3 A Selection of Stars MV mV Luminosity Temp Porrima Spectral Class F0 3 04 3 40 5 20 7200 Luminosity Class V 2 IX Carina M2 2 93 7 75 1271 02 3500 III 3 Mirphak F5 4 21 1 75 4132 16 6600 I and II 4 Zeta Reticuli G2 5 10 5 50 0 78 5900 V 5 YY Geminorum M1 8 96 9 95 0 022 3600 V 6 Epsilon Indi K5 6 86 4 65 0 15 4300 V 7 Zubenelgenubi A3 0 92 2 75 36 65 8600 V 8 Alfirk B2 3 41 3 20 1977 7 21000 V 9 Deneb A2 6 93 1 25 50609 37 9000 I and II 1 0 40 Eridani B B4 11 01 9 52 0 003 17000 wd 11 Sadalmelik G2 3 08 2 96 1459 3 6000 I and II 1 2 Unukalhai K2 0 82 2 60 40 19 4900 III 1 3 Beta Persei A B9 0 19 2 12 101 88 10795 07 V 1 4 Beta Persei B K5 2 90 5 21 5 92 4471 94 I and II Star 1 Epsilon Tauri s spectral class and luminosity class K3 III Sirius B s spectral class and luminosity class B9 V WORKSHEET 4 The HR Diagram 10 9 8 7 6 5 4 3 2 1 0 Absolute Magnitude 1 2 3 4 5 6 7 8 w 9 10 w 11 w 12 w w w w 13 w w w 14 w 15 w 16 17 18 19 w w V III I and II White Dwarfs w 20 O0 B0 A0 F0 G0 Spectral Class K0 M0