OF THE ROGER N. CLARK

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-- VISUAL ASTRONOMY OF THE DEEP SKY A VISUAL ATLAS OF DEEP-SKY OBJECTS -- 20/ -- Photograph oJ M84 (at toP,just lift oJ center) and M86 (the large object 3 centimeters below and slightly to the right oJ M84) . North is to the lower lift. A finder chart Jo r the other galaxies is on page 146, and oneJor the whole inner Virgo Cluster region is on page 147. (Courtesy Akita Fujii.) Drawing oJ M84, M86, and many other galaxies in Virgo. A finder chart is on page 146. Scale: 5.4 arc-min/cm Viewing Distance (cm) 8-inch f/ 1 l.5 Cassegrain 20mm Erfle (117X) IOx:64 25 X:25 50X:13 100X:6 200X:3 300X:2 air mass: 1.14, faintest star: 14.2 at zenith, 188X; no tracking 2/1 2/83 11: 10-1 1:58 UT at Waianae ranch, Hawaii; R. Clark 148 149
--- --- -- NGC 4449, GALAXY IN CANES VENATICI R.A. 12h 28.2m, Dec. 44° 05' (2000.0) Technical. NGC 4449 is an irregular galaxy in the approximate shape of a rectangle. On the northern corner is a small hook that points east, composed mostly ofH II regions. VISUAL ASTRONOMY OF THE DEEP SKY Visual. This galaxy appears 4.2 by 3.0 arc. minutes in size and has a total magnitude of 10.5. The mean surface brightness is 21.9 magnitudes per square arc-second. Through the 8-inch, the galaxy appeared as an elon. gated glow with a faint extension on the north side that corresponds to the hook in the photograph. Under some conditions at low powers with medium size telescopes, the galaxy may appear more rectangular. A VISUAL ATLAS OF DEEP-SKY OBJECTS • -- 5' --- Photograph of NGC 4449. South is up . (Courtesy of K.A. Brownlee and Deep Sky Magazine.) Scale: 1.0 arc-min/cm 8-inch flll.5 Cassegrain 12.4mm Erfle (188X) Drawing of NGC 4449. Viewing Distance (Cr.1) 25 X:138 200x:17 50 X: 68 300 X : I I lOOx: 34 400 x: 9 air mass: l.16, faintest star: 14.3 at zenith 188x· " no tracking 5/ 1 1/83 9: 17-9:30 UT at Waianae ranch ' Hawaii· , R. Clark 150 151
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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,
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PREFACE During research for this bo
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VISUAL ASTRONOMY OF THE DEEP SKY AB
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VISUAL ASTRONOMY OF THE DEEP SKY TH
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.. .. .. .. VISUAL ASTRONOMY OF THE
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e viewed with enough magnification
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lens and a piano-convex eye lens. A
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controlled depends on how many laye
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The Lumicon H-Beta Filter (Figure 3
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every 1 ° in declination and 4 min
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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 and 58: M42 (NGC 1976), M43 (NGC 1982), THE
Page 59 and 60: --- --- --- VISUAL ASTRONOMY OF THE
Page 61 and 62: -- --- NGC 2023 NGC 2024, IC 434 (T
Page 63 and 64: --- --- M78 (NGC 2068), NGC 2071, D
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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: == -- VISUAL ASTRONOMY OF THE DEEP
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 109 and 110: --- -- VISUAL ASTRONOMY OF THE DEEP
Page 111 and 112: ---------------- 5 / --------______
Page 113 and 114: --- -- VISUAL ASTRONOMY OF THE DEEP
Page 115 and 116: VISUAL ASTRONOMY OF THE DEEP SKY --
Page 119 and 120: -- -- VISUAL ASTRONOMY OF THE DEEP
Page 123 and 124: -- MI5 (NGC 7078), GLOBULAR CLUSTER
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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 DEEP
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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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