An Atlas of Stellar Spectra with an Outline of Spectral Classification

W.W. Morgan, Philip C. Keenan and Edith Kellman

The University of Chicago Press
1943

Star Index | Atlas Booklet | Home Page

Plate Index

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48  49  50  51  52  53  54  55 

On this page you will find links to scans made of all 55 plates from the MKK Atlas. In each case, both the full plate and the central spectral area are available. Below you will find links to all of the files available. By clicking on the plate title or thumbnail you will be taken to a plate's individual page.

Individual pages show a 72dpi image of the full plate on which the spectral region can be clicked for a 200dpi enlargement or the rest of the plate clicked for a full plate enlargement at 150dpi. In addition, 300dpi versions of the full image and 600dpi versions of the spectral region only are available from links below the main image. Image files can be large and in each case the file size is indicated.

If you are looking for a specific star then consult the Star Index which lists all the plates on which a particular star appears. All star names are written as in the Atlas, but with Greek letters transliterated. This index can be cross–referenced with that found at the back of the Atlas Booklet.

Thumbnail of plate 1
Plate 1: 05 - B0 Standards
mkatlas_01_centre_at_600dpi.jpg (3 Mb)
mkatlas_01_full_at_300dpi.jpg (1 Mb)
mkatlas_01_full_at_072dpi.jpg (78 kb)
mkatlas_01_full_at_150dpi.jpg (378 kb)
mkatlas_01_centre_at_200dpi.jpg (288 kb)
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Plate 2: Two Wolf - Rayet Stars
mkatlas_02_centre_at_600dpi.jpg (2 Mb)
mkatlas_02_full_at_300dpi.jpg (950 kb)
mkatlas_02_full_at_072dpi.jpg (58 kb)
mkatlas_02_full_at_150dpi.jpg (335 kb)
mkatlas_02_centre_at_200dpi.jpg (229 kb)
Thumbnail of plate 3
Plate 3: Main Sequence 09 - B9
mkatlas_03_centre_at_600dpi.jpg (3 Mb)
mkatlas_03_full_at_072dpi.jpg (63 kb)
mkatlas_03_full_at_300dpi.jpg (1 Mb)
mkatlas_03_full_at_150dpi.jpg (348 kb)
mkatlas_03_centre_at_200dpi.jpg (355 kb)
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Plate 4: Supergiants O9.5 - A0
mkatlas_04_centre_at_600dpi.jpg (4 Mb)
mkatlas_04_full_at_072dpi.jpg (66 kb)
mkatlas_04_full_at_300dpi.jpg (1 Mb)
mkatlas_04_full_at_150dpi.jpg (344 kb)
mkatlas_04_centre_at_200dpi.jpg (383 kb)
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Plate 5: Luminosity Effects at O9
mkatlas_05_centre_at_600dpi.jpg (1 Mb)
mkatlas_05_full_at_072dpi.jpg (48 kb)
mkatlas_05_full_at_300dpi.jpg (754 kb)
mkatlas_05_full_at_150dpi.jpg (279 kb)
mkatlas_05_centre_at_200dpi.jpg (152 kb)
Thumbnail of plate 6
Plate 6: Luminosity Effects at O9.5
mkatlas_06_centre_at_600dpi.jpg (2 Mb)
mkatlas_06_full_at_072dpi.jpg (72 kb)
mkatlas_06_full_at_300dpi.jpg (955 kb)
mkatlas_06_full_at_150dpi.jpg (362 kb)
mkatlas_06_centre_at_200dpi.jpg (193 kb)
Thumbnail of plate 7
Plate 7: Luminosity Effects at B0
mkatlas_07_centre_at_600dpi.jpg (1 Mb)
mkatlas_07_full_at_072dpi.jpg (71 kb)
mkatlas_07_full_at_300dpi.jpg (871 kb)
mkatlas_07_full_at_150dpi.jpg (304 kb)
mkatlas_07_centre_at_200dpi.jpg (149 kb)
Thumbnail of plate 8
Plate 8: AG Pegasi = BD + 11° 4673
mkatlas_08_centre_at_600dpi.jpg (1 Mb)
mkatlas_08_full_at_072dpi.jpg (49 kb)
mkatlas_08_full_at_300dpi.jpg (647 kb)
mkatlas_08_full_at_150dpi.jpg (295 kb)
mkatlas_08_centre_at_200dpi.jpg (138 kb)
Thumbnail of plate 9
Plate 9: Luminosity Effects at B0.5
mkatlas_09_centre_at_600dpi.jpg (2 Mb)
mkatlas_09_full_at_072dpi.jpg (71 kb)
mkatlas_09_full_at_300dpi.jpg (864 kb)
mkatlas_09_full_at_150dpi.jpg (299 kb)
mkatlas_09_centre_at_200dpi.jpg (159 kb)
Thumbnail of plate 10
Plate 10: Luminosity Effects at B1
mkatlas_10_centre_at_600dpi.jpg (2 Mb)
mkatlas_10_full_at_072dpi.jpg (76 kb)
mkatlas_10_full_at_300dpi.jpg (1 Mb)
mkatlas_10_full_at_150dpi.jpg (358 kb)
mkatlas_10_centre_at_200dpi.jpg (196 kb)
Thumbnail of plate 11
Plate 11: Luminosity Effects at B2
mkatlas_11_centre_at_600dpi.jpg (1 Mb)
mkatlas_11_full_at_072dpi.jpg (62 kb)
mkatlas_11_full_at_300dpi.jpg (854 kb)
mkatlas_11_full_at_150dpi.jpg (276 kb)
mkatlas_11_centre_at_200dpi.jpg (149 kb)
Thumbnail of plate 12
Plate 12: The Be Star phi Persei
mkatlas_12_centre_at_600dpi.jpg (940 kb)
mkatlas_12_full_at_072dpi.jpg (43 kb)
mkatlas_12_full_at_300dpi.jpg (606 kb)
mkatlas_12_full_at_150dpi.jpg (189 kb)
mkatlas_12_centre_at_200dpi.jpg (78 kb)
Thumbnail of plate 13
Plate 13: The Bnn Stars
mkatlas_13_centre_at_600dpi.jpg (1 Mb)
mkatlas_13_full_at_072dpi.jpg (51 kb)
mkatlas_13_full_at_300dpi.jpg (662 kb)
mkatlas_13_full_at_150dpi.jpg (318 kb)
mkatlas_13_centre_at_200dpi.jpg (222 kb)
Thumbnail of plate 14
Plate 14: P Cygni
mkatlas_14_centre_at_600dpi.jpg (907 kb)
mkatlas_14_full_at_072dpi.jpg (42 kb)
mkatlas_14_full_at_300dpi.jpg (578 kb)
mkatlas_14_full_at_150dpi.jpg (211 kb)
mkatlas_14_centre_at_200dpi.jpg (117 kb)
Thumbnail of plate 15
Plate 15: Luminosity Effects at B3
mkatlas_15_centre_at_600dpi.jpg (1 Mb)
mkatlas_15_full_at_072dpi.jpg (45 kb)
mkatlas_15_full_at_300dpi.jpg (596 kb)
mkatlas_15_full_at_150dpi.jpg (207 kb)
mkatlas_15_centre_at_200dpi.jpg (112 kb)
Thumbnail of plate 16
Plate 16: Luminosity Effects at B5
mkatlas_16_centre_at_600dpi.jpg (1 Mb)
mkatlas_16_full_at_072dpi.jpg (52 kb)
mkatlas_16_full_at_300dpi.jpg (709 kb)
mkatlas_16_full_at_150dpi.jpg (224 kb)
mkatlas_16_centre_at_200dpi.jpg (126 kb)
Thumbnail of plate 17
Plate 17: Luminosity Effects at B8
mkatlas_17_centre_at_600dpi.jpg (959 kb)
mkatlas_17_full_at_072dpi.jpg (57 kb)
mkatlas_17_full_at_300dpi.jpg (687 kb)
mkatlas_17_full_at_150dpi.jpg (232 kb)
mkatlas_17_centre_at_200dpi.jpg (98 kb)
Thumbnail of plate 18
Plate 18: The Peculiar Stars beta Lyr and upsilon Sgr
mkatlas_18_centre_at_600dpi.jpg (1 Mb)
mkatlas_18_full_at_072dpi.jpg (53 kb)
mkatlas_18_full_at_300dpi.jpg (651 kb)
mkatlas_18_full_at_150dpi.jpg (233 kb)
mkatlas_18_centre_at_200dpi.jpg (146 kb)
Thumbnail of plate 19
Plate 19: Main Sequence B8—A2
mkatlas_19_centre_at_600dpi.jpg (2 Mb)
mkatlas_19_full_at_072dpi.jpg (78 kb)
mkatlas_19_full_at_300dpi.jpg (960 kb)
mkatlas_19_full_at_150dpi.jpg (329 kb)
mkatlas_19_centre_at_200dpi.jpg (239 kb)
Thumbnail of plate 20
Plate 20: Supergiants A0—F0
mkatlas_20_centre_at_600dpi.jpg (1 Mb)
mkatlas_20_full_at_072dpi.jpg (78 kb)
mkatlas_20_full_at_300dpi.jpg (888 kb)
mkatlas_20_full_at_150dpi.jpg (293 kb)
mkatlas_20_centre_at_200dpi.jpg (146 kb)
Thumbnail of plate 21
Plate 21: Luminosity Effects at A0
mkatlas_21_centre_at_600dpi.jpg (965 kb)
mkatlas_21_full_at_072dpi.jpg (45 kb)
mkatlas_21_full_at_300dpi.jpg (611 kb)
mkatlas_21_full_at_150dpi.jpg (212 kb)
mkatlas_21_centre_at_200dpi.jpg (121 kb)
Thumbnail of plate 22
Plate 22: Main Sequence A2—F0
mkatlas_22_centre_at_600dpi.jpg (1 Mb)
mkatlas_22_full_at_072dpi.jpg (49 kb)
mkatlas_22_full_at_300dpi.jpg (734 kb)
mkatlas_22_full_at_150dpi.jpg (259 kb)
mkatlas_22_centre_at_200dpi.jpg (189 kb)
Thumbnail of plate 23
Plate 23: The “Metallic—Line Star” 63 Tauri
mkatlas_23_centre_at_600dpi.jpg (1 Mb)
mkatlas_23_full_at_072dpi.jpg (58 kb)
mkatlas_23_full_at_300dpi.jpg (809 kb)
mkatlas_23_full_at_150dpi.jpg (290 kb)
mkatlas_23_centre_at_200dpi.jpg (201 kb)
Thumbnail of plate 24
Plate 24: Two Peculiar A Stars
mkatlas_24_centre_at_600dpi.jpg (2 Mb)
mkatlas_24_full_at_072dpi.jpg (84 kb)
mkatlas_24_full_at_300dpi.jpg (994 kb)
mkatlas_24_full_at_150dpi.jpg (342 kb)
mkatlas_24_centre_at_200dpi.jpg (198 kb)
Thumbnail of plate 25
Plate 25: Luminosity Effects at A3
mkatlas_25_centre_at_600dpi.jpg (901 kb)
mkatlas_25_full_at_072dpi.jpg (44 kb)
mkatlas_25_full_at_300dpi.jpg (635 kb)
mkatlas_25_full_at_150dpi.jpg (272 kb)
mkatlas_25_centre_at_200dpi.jpg (105 kb)
Thumbnail of plate 26
Plate 26: Luminosity Effects at A5
mkatlas_26_centre_at_600dpi.jpg (1 Mb)
mkatlas_26_full_at_072dpi.jpg (44 kb)
mkatlas_26_full_at_300dpi.jpg (641 kb)
mkatlas_26_full_at_150dpi.jpg (277 kb)
mkatlas_26_centre_at_200dpi.jpg (135 kb)
Thumbnail of plate 27
Plate 27: The Spectrum of 17 Leporis
mkatlas_27_centre_at_600dpi.jpg (1 Mb)
mkatlas_27_full_at_072dpi.jpg (67 kb)
mkatlas_27_full_at_300dpi.jpg (917 kb)
mkatlas_27_full_at_150dpi.jpg (339 kb)
mkatlas_27_centre_at_200dpi.jpg (112 kb)
Thumbnail of plate 28
Plate 28: Luminosity Effects at A7
mkatlas_28_centre_at_600dpi.jpg (710 kb)
mkatlas_28_full_at_072dpi.jpg (43 kb)
mkatlas_28_full_at_300dpi.jpg (502 kb)
mkatlas_28_full_at_150dpi.jpg (232 kb)
mkatlas_28_centre_at_200dpi.jpg (89 kb)
Thumbnail of plate 29
Plate 29: Main Sequence F0—M2
mkatlas_29_centre_at_600dpi.jpg (2 Mb)
mkatlas_29_full_at_072dpi.jpg (49 kb)
mkatlas_29_full_at_300dpi.jpg (722 kb)
mkatlas_29_full_at_150dpi.jpg (475 kb)
mkatlas_29_centre_at_200dpi.jpg (453 kb)
Thumbnail of plate 30
Plate 30: Supergiants F0—K5
mkatlas_30_centre_at_600dpi.jpg (2 Mb)
mkatlas_30_full_at_072dpi.jpg (86 kb)
mkatlas_30_full_at_300dpi.jpg (1 Mb)
mkatlas_30_full_at_150dpi.jpg (405 kb)
mkatlas_30_centre_at_200dpi.jpg (387 kb)
Thumbnail of plate 31
Plate 31: Luminosity Effects at F0
mkatlas_31_centre_at_600dpi.jpg (1 Mb)
mkatlas_31_full_at_072dpi.jpg (63 kb)
mkatlas_31_full_at_300dpi.jpg (745 kb)
mkatlas_31_full_at_150dpi.jpg (249 kb)
mkatlas_31_centre_at_200dpi.jpg (115 kb)
Thumbnail of plate 32
Plate 32: The Peculiar F Stars beta CrB and gamma Equ
mkatlas_32_centre_at_600dpi.jpg (1 Mb)
mkatlas_32_full_at_072dpi.jpg (89 kb)
mkatlas_32_full_at_300dpi.jpg (1000 kb)
mkatlas_32_full_at_150dpi.jpg (365 kb)
mkatlas_32_centre_at_200dpi.jpg (173 kb)
Thumbnail of plate 33
Plate 33: The Cluster Type Variable RR Lyr
mkatlas_33_centre_at_600dpi.jpg (1 Mb)
mkatlas_33_full_at_072dpi.jpg (87 kb)
mkatlas_33_full_at_300dpi.jpg (1 Mb)
mkatlas_33_full_at_150dpi.jpg (376 kb)
mkatlas_33_centre_at_200dpi.jpg (138 kb)
Thumbnail of plate 34
Plate 34: The Variable Star SU Tau
mkatlas_34_centre_at_600dpi.jpg (754 kb)
mkatlas_34_full_at_072dpi.jpg (62 kb)
mkatlas_34_full_at_300dpi.jpg (780 kb)
mkatlas_34_full_at_150dpi.jpg (291 kb)
mkatlas_34_centre_at_200dpi.jpg (103 kb)
Thumbnail of plate 35
Plate 35: Luminosity Effects at F6
mkatlas_35_centre_at_600dpi.jpg (825 kb)
mkatlas_35_full_at_072dpi.jpg (57 kb)
mkatlas_35_full_at_300dpi.jpg (892 kb)
mkatlas_35_full_at_150dpi.jpg (376 kb)
mkatlas_35_centre_at_200dpi.jpg (166 kb)
Thumbnail of plate 36
Plate 36: Normal Giants F8—K5
mkatlas_36_centre_at_600dpi.jpg (2 Mb)
mkatlas_36_full_at_072dpi.jpg (66 kb)
mkatlas_36_full_at_300dpi.jpg (947 kb)
mkatlas_36_full_at_150dpi.jpg (347 kb)
mkatlas_36_centre_at_200dpi.jpg (328 kb)
Thumbnail of plate 37
Plate 37: Luminosity Effects at F8
mkatlas_37_centre_at_600dpi.jpg (842 kb)
mkatlas_37_full_at_072dpi.jpg (61 kb)
mkatlas_37_full_at_300dpi.jpg (802 kb)
mkatlas_37_full_at_150dpi.jpg (300 kb)
mkatlas_37_centre_at_200dpi.jpg (172 kb)
Thumbnail of plate 38
Plate 38: High Luminosity Stars at F8
mkatlas_38_centre_at_600dpi.jpg (903 kb)
mkatlas_38_full_at_072dpi.jpg (75 kb)
mkatlas_38_full_at_300dpi.jpg (948 kb)
mkatlas_38_full_at_150dpi.jpg (333 kb)
mkatlas_38_centre_at_200dpi.jpg (218 kb)
Thumbnail of plate 39
Plate 39: The Cepheid Variable X Cygni
mkatlas_39_centre_at_600dpi.jpg (1 Mb)
mkatlas_39_full_at_072dpi.jpg (66 kb)
mkatlas_39_full_at_300dpi.jpg (868 kb)
mkatlas_39_full_at_150dpi.jpg (304 kb)
mkatlas_39_centre_at_200dpi.jpg (214 kb)
Thumbnail of plate 40
Plate 40: Luminosity Effects at G0
mkatlas_40_centre_at_600dpi.jpg (668 kb)
mkatlas_40_full_at_072dpi.jpg (56 kb)
mkatlas_40_full_at_300dpi.jpg (801 kb)
mkatlas_40_full_at_150dpi.jpg (287 kb)
mkatlas_40_centre_at_200dpi.jpg (151 kb)
Thumbnail of plate 41
Plate 41: Luminosity Effects at G5
mkatlas_41_centre_at_600dpi.jpg (795 kb)
mkatlas_41_full_at_072dpi.jpg (86 kb)
mkatlas_41_full_at_300dpi.jpg (1 Mb)
mkatlas_41_full_at_150dpi.jpg (383 kb)
mkatlas_41_centre_at_200dpi.jpg (186 kb)
Thumbnail of plate 42
Plate 42: The High—Velocity Star Boss 2527
mkatlas_42_centre_at_600dpi.jpg (702 kb)
mkatlas_42_full_at_072dpi.jpg (75 kb)
mkatlas_42_full_at_300dpi.jpg (920 kb)
mkatlas_42_full_at_150dpi.jpg (332 kb)
mkatlas_42_centre_at_200dpi.jpg (170 kb)
Thumbnail of plate 43
Plate 43: The Variable Star V Vul
mkatlas_43_centre_at_600dpi.jpg (564 kb)
mkatlas_43_full_at_072dpi.jpg (58 kb)
mkatlas_43_full_at_300dpi.jpg (882 kb)
mkatlas_43_full_at_150dpi.jpg (312 kb)
mkatlas_43_centre_at_200dpi.jpg (144 kb)
Thumbnail of plate 44
Plate 44: Luminosity Effects at G8
mkatlas_44_centre_at_600dpi.jpg (867 kb)
mkatlas_44_full_at_072dpi.jpg (76 kb)
mkatlas_44_full_at_300dpi.jpg (989 kb)
mkatlas_44_full_at_150dpi.jpg (377 kb)
mkatlas_44_centre_at_200dpi.jpg (186 kb)
Thumbnail of plate 45
Plate 45: The High—Velocity Star delta Leporis
mkatlas_45_centre_at_600dpi.jpg (614 kb)
mkatlas_45_full_at_072dpi.jpg (81 kb)
mkatlas_45_full_at_300dpi.jpg (1 Mb)
mkatlas_45_full_at_150dpi.jpg (384 kb)
mkatlas_45_centre_at_200dpi.jpg (169 kb)
Thumbnail of plate 46
Plate 46: Luminosity Effects at K0
mkatlas_46_centre_at_600dpi.jpg (1 Mb)
mkatlas_46_full_at_072dpi.jpg (84 kb)
mkatlas_46_full_at_300dpi.jpg (1 Mb)
mkatlas_46_full_at_150dpi.jpg (376 kb)
mkatlas_46_centre_at_200dpi.jpg (260 kb)
Thumbnail of plate 47
Plate 47: High Luminosity Stars at K1
mkatlas_47_centre_at_600dpi.jpg (734 kb)
mkatlas_47_full_at_072dpi.jpg (66 kb)
mkatlas_47_full_at_300dpi.jpg (917 kb)
mkatlas_47_full_at_150dpi.jpg (341 kb)
mkatlas_47_centre_at_200dpi.jpg (193 kb)
Thumbnail of plate 48
Plate 48: Liminosity Effects at K3
mkatlas_48_centre_at_600dpi.jpg (714 kb)
mkatlas_48_full_at_072dpi.jpg (58 kb)
mkatlas_48_full_at_300dpi.jpg (764 kb)
mkatlas_48_full_at_150dpi.jpg (274 kb)
mkatlas_48_centre_at_200dpi.jpg (163 kb)
Thumbnail of plate 49
Plate 49: High Luminosity Stars at K3
mkatlas_49_centre_at_600dpi.jpg (985 kb)
mkatlas_49_full_at_072dpi.jpg (69 kb)
mkatlas_49_full_at_300dpi.jpg (952 kb)
mkatlas_49_centre_at_200dpi.jpg (223 kb)
mkatlas_49_full_at_150dpi.jpg (329 kb)
Thumbnail of plate 50
Plate 50: Luminosity Effects at K5
mkatlas_50_centre_at_600dpi.jpg (991 kb)
mkatlas_50_full_at_072dpi.jpg (55 kb)
mkatlas_50_full_at_300dpi.jpg (677 kb)
mkatlas_50_full_at_150dpi.jpg (261 kb)
mkatlas_50_centre_at_200dpi.jpg (143 kb)
Thumbnail of plate 51
Plate 51: The M Giant Sequence
mkatlas_51_centre_at_600dpi.jpg (1 Mb)
mkatlas_51_full_at_072dpi.jpg (69 kb)
mkatlas_51_full_at_300dpi.jpg (887 kb)
mkatlas_51_full_at_150dpi.jpg (335 kb)
mkatlas_51_centre_at_200dpi.jpg (183 kb)
Thumbnail of plate 52
Plate 52: The M Sequence is a Temperature Sequence
mkatlas_52_centre_at_600dpi.jpg (1 Mb)
mkatlas_52_full_at_072dpi.jpg (94 kb)
mkatlas_52_full_at_300dpi.jpg (1 Mb)
mkatlas_52_full_at_150dpi.jpg (400 kb)
mkatlas_52_centre_at_200dpi.jpg (154 kb)
Thumbnail of plate 53
Plate 53: Luminosity Effects in the Early M Giants
mkatlas_53_centre_at_600dpi.jpg (609 kb)
mkatlas_53_full_at_072dpi.jpg (70 kb)
mkatlas_53_full_at_300dpi.jpg (858 kb)
mkatlas_53_full_at_150dpi.jpg (307 kb)
mkatlas_53_centre_at_200dpi.jpg (210 kb)
Thumbnail of plate 54
Plate 54: A Carbon Star and a Long Period Variable
mkatlas_54_centre_at_600dpi.jpg (1 Mb)
mkatlas_54_full_at_300dpi.jpg (881 kb)
mkatlas_54_full_at_072dpi.jpg (77 kb)
mkatlas_54_full_at_150dpi.jpg (346 kb)
mkatlas_54_centre_at_200dpi.jpg (145 kb)
Thumbnail of plate 55
Plate 55: The Banded Stars in the Visual Region
mkatlas_55_centre_at_600dpi.jpg (703 kb)
mkatlas_55_full_at_300dpi.jpg (971 kb)
mkatlas_55_full_at_072dpi.jpg (78 kb)
mkatlas_55_full_at_150dpi.jpg (348 kb)
mkatlas_55_centre_at_200dpi.jpg (251 kb)

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