OF THE ROGER N. CLARK

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VISUAL ASTRONOMY OF THE DEEP SKY A VISUAL ATLAS OF DEEP-SKY OBJECTS -- . . • • ---10' -- Photograph of M42 and M43. South is up . (Courtesy Mount Wilson and Las Campanas Observatories, Carnegie Institution of Washington.) 100 101
--- --- --- VISUAL ASTRONOMY OF THE DEEP SKY A VISUAL ATLAS OF DEEP-SKY OBJECTS Drawing of M42 and M43 made in January, 1983 on previous page. The main loops oj M42 and detail in the Trapezium region were best seen at 188x . The fa int outer loop was first detected at 82X, then seen better at 117X, and could also be made out at 188x . Thefinal drawing took aboutfour hours. Scale: 2.5 arc-min/cm 8-inch fil1.5 Cassegrain 28mm Kellner (82X) 20mm Erfle (117 x) 12.4mm Erfle (188x) Viewing Distance (cm) 25X:55 50x:28 100x: 14 200X:7 300X:5 400x:3 Drawing Method 2 (see Chapter 5) on two nights: air mass: 1.12, faintest star: 14.0 at zenith, 188X, no tracking 1/16/83 8:00-8:40 UT at Barbers Point, Hawaii - Drawing oj M42 and M43 made inJanuary, 1982 on next page. Compare this drawing with the one made in January, 1983. The great,!r detail in the latter is due to the use oj several magnifications and more time at the telescope. Scale: 2.5 arc-min/cm 8-inch fil1.5 Cassegrain 28mm Kellner (82 X ) 20mm Erfle (117 x) Viewing Distance (cm) 25 X:55 50 x:28 100x: 14 200X :7 300X :5 400X :3 air mass: 1.24, faintest star: 13.4 at zenith " lJ 7x· no tracking 1/24/82 9:07-9:55 UT at Ewa Beach, Hawaii' ' R. Clark .. • • • air mass: 1.12, faintest star: 13.8 at zenith, 188X, no tracking 1/18/83 8:40-9:48 UT at Hawaii Kai, Hawaii; R. Clark • • • • • • • • 10' 102 103
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OF THE ROGER N. CLARK
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Published by Sky Publishing Corpora
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CONTENTS M78 (NGC 2068) NGC 207 1,
Page 7 and 8: PREFACE During research for this bo
Page 9 and 10: VISUAL ASTRONOMY OF THE DEEP SKY AB
Page 11 and 12: VISUAL ASTRONOMY OF THE DEEP SKY TH
Page 13 and 14: .. .. .. .. VISUAL ASTRONOMY OF THE
Page 17 and 18: e viewed with enough magnification
Page 21 and 22: lens and a piano-convex eye lens. A
Page 25 and 26: controlled depends on how many laye
Page 27 and 28: The Lumicon H-Beta Filter (Figure 3
Page 29 and 30: every 1 ° in declination and 4 min
Page 31 and 32: error of only one quarter the field
Page 33 and 34: Table 4.1. Ideal limiting magnitude
Page 35 and 36: 5 Making drawings and keeping recor
Page 37 and 38: more detail in the future. They add
Page 39 and 40: .. .. .. ... Contrast (C) C Log(C)
Page 41 and 42: VISUAL ASTRONOMY OF THE DEEP SKY A
Page 47 and 48: --- VISUAL ASTRONOMY OF THE DEEP SK
Page 49 and 50: --- M76 (NGC 650-651), PLANETARY NE
Page 53 and 54: -- -- M45, THE PLEIADES OPEN CLUSTE
Page 55 and 56: -- Brightest stars of the Pleiades
Page 57: M42 (NGC 1976), M43 (NGC 1982), THE
Page 61 and 62: -- --- NGC 2023 NGC 2024, IC 434 (T
Page 63 and 64: --- --- M78 (NGC 2068), NGC 2071, D
Page 65 and 66: VISUAL ASTRONOMY OF THE DEEP SKY --
Page 67 and 68: --- M67 (NGC 2682), OPEN CLUSTER IN
Page 69 and 70: -- VISUAL ASTRONOMY OF THE DEEP SKY
Page 71 and 72: --- -- M82 (NGC 3034), PECULIAR GAL
Page 73 and 74: -- --- --- MI05 (NGe 3379) NGe 3384
Page 77 and 78: MI09 (NGe 3992), GALAXY IN URSA MAJ
Page 79 and 80: -- --- M99 (NGC 4254), GALAXY IN CO
Page 81 and 82: == -- VISUAL ASTRONOMY OF THE DEEP
Page 83 and 84: --- --- -- NGC 4449, GALAXY IN CANE
Page 85 and 86: -- -- --- VISUAL ASTRONOMY OF THE D
Page 87 and 88: --- -- M90 (NGC 4569), GALAXY IN VI
Page 89 and 90: --- -- M94 (NGC 4736), GALAXY IN CA
Page 93 and 94: -- VISUAL ASTRON0MY OF THE DEEP SKY
Page 95 and 96: -- --- -- VISUAL ASTRONOMY OF THE D
Page 97 and 98: -- -- VISUAL ASTRONOMY OF THE DEEP
Page 99 and 100: --- -- M83 (NGC 5236), GALAXY IN HY
Page 107 and 108: --- VISUAL ASTRONOMY OF THE DEEP SK
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--- -- VISUAL ASTRONOMY OF THE DEEP
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---------------- 5 / --------______
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VISUAL ASTRONOMY OF THE DEEP SKY --
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-- VISUAL ASTRONOMY OF THE DEEP SKY
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-- -- VISUAL ASTRONOMY OF THE DEEP
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VISUAL ASTRONOMY OF THE DEEP SKY A
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-- MI5 (NGC 7078), GLOBULAR CLUSTER
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--- VISUAL ASTRONOMY OF THE DEEP SK
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-- VISUAL ASTRONOMY OF THE DEEP SKY
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-- ·rl E I u L ro 5 +J Q) (f) 0 Y
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-- --- VISUAL ASTRONOMY OF THE DEEP
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VISUAL ASTRONOMY OF THE DEEP SKY NG
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'2 5 -rl E I U L CO '---' -t-J ill
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VISUAL ASTRONOMY OF THE DEEP SKY AP
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VISUAL ASTRONOMY OF THE DEEP SKY Ta
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-- Appendix E A catalog of deep-sky
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-- -- --- VISUAL ASTRONOMY OF THE D
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--- --- VISUAL ASTRONOMY OF THE DEE
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-- -- VISUAL ASTRONOMY OF THE DEEP
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-- APPENDIX F: OPTIMUM DETECTION MA
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------- VISUAL ASTRONOMY OF THE DEE
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--- VISUAL ASTRONOMY OF THE DEEP SK
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VISUAL ASTRONOMY OF THE DEEP SKY -
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VISUAL ASTRONOMY OF THE DEEP SKY -
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G VISUAL ASTRONOMY OF THE DEEP SKY
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INDEX INDEX M70 (NGC 6681), 312, 31
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OF THE ROGER N. CLARK

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