TABLE 860.— STELLAR TEMPERATURES AND DIAMETERS* 



753 



Main sequence trie 



P Centauri 9 



v Scorpii 4.3 



/3 Aurigae A 2.8 



a Lyrae 1 



o Can Maj A ... — 1.6 



a Aquilae 9 



a Can Min 5 



a Centauri A 1 



70 Ophiuchi A . . 4.3 



61 Cygni A 5.6 



Kruger 60 A ... . 9.8 

 Barnard's Star ... 9.4 



Giants 



a Aungae A 2 



a Bootis 2 



a Tauri 8 



/3 Pegasi 2.2 



o Orionis 9 



a Scorpii A 1.2 



White dwarfs 



a Can Maj B ... 8.5 

 40 Eridani B . . . . 9.4 

 van Maanen's Star. 12.3 



Sp 



B3 



B3 



A0 



A0 



A0 



A4 



dF4 



dG3 



dKO 



dKS 



dM4 



dMS 



gG\ 



gKO 

 gKS 

 gM3 

 cM2 

 cM2 



c 

 '.'036 

 .009 

 .034 

 .122 

 .378 

 .206 

 .294 

 .755 

 .192 

 .298 

 .256 

 .544 



.073 

 .091 

 .058 

 .016 

 .017 

 .0095 



.378 

 .200 

 .245 



Mv 



—1.3 



— .8 

 .6 

 .5 



1.3 

 2.5 

 2.8 

 4.5 

 5.7 

 8.0 

 11.8 

 13.1 



— .5 

 .0 



— .4 

 —1.0 

 -4.0 

 -3.5 



11.4 

 10.9 

 14.2 



T R 



21 ,000° K 11 

 21,000 3.2 



10,700 

 10,700 

 10,700 

 8,800 

 6,100 

 5,850 

 5,740 

 4,300 

 3,180 

 3,020 



5,150 

 4,620 

 3,940 

 3,390 

 3,060 

 3,060 



7,500 



11,000 



7,500 



2.4 



2.4 



1.8 



1.4 



1.9 



1.0 



1.0 

 .7 

 .34 

 .16 



12 



30 



70 



160 



480 



380 



d 



'.'001 



.0003 



.0008 



.003 



.006 



.003 



.006 



.007 



.002 



.003 



.0008 



.0008 



.007 

 .023 

 .034 

 .025 



(25) 



(5.2) 



2.2 



(3.0) 



2.4 



(1.7) 



1.1 



1.1 



.9 



(.45) 



.26 



(.18) 



4.2 

 (8) 

 (5) 

 (6) 



.048 (35) 

 .042 (22) 



p 

 .018 

 .16 

 .13 

 .11 

 .42 

 .6 

 .16 



1.1 

 .9 



1.3 



9. 

 45: 



.0024 



.0003 

 1.4X10- 

 1.5X10- 

 3X10- 7 

 5X10- 7 



.034 

 .018 

 .009: 



.00012 

 .00004 

 .00002 



.96 5X10 4 



.44 7X10 4 



(.14) 10 s — 10 s 



Many of the data were taken from the reference given in footnote 277. The spectra, magni- 

 tudes, radii, parallaxes, and densities have been revised for some of the stars. The letters A and 

 5 denote the brighter and fainter components, respectively, of binary stars. 



Apparent (visual) magnitude is denoted by m v , spectral class by Sp, parallax in seconds of arc, 

 p, absolute (visual) magnitude by M„, radius in terms of the sun by R, apparent diameter in 

 seconds of arc by d, mass in terms of the sun by n, and density by p (in g/cm 8 ). 



* Prepared by Edith J. Tebo, Harvard College Observatory. 



277 Russell, Dugan, and Stewart, Astronomy, p. 740, Ginn & Co., 1926. Used by permission. 



TABLE 861.— SPECTRUM TYPE AND MEAN VISUAL 

 ABSOLUTE MAGNITUDE* 



Prepared by R. E. Wilson, Mount Wilson Observatory. 



SMITHSONIAN PHYSICAL TABLES 



