Nebulae and How to Observe Them

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Northern Winter Nebulae 80 This image of NGC 2467 was taken by Chris Schur with a 12.5 inch f/5 Newtonian. Pyxis Nebulosity NGC 2818 OPNCL PYX 09 16.0 -36 38 NGC 2818A PLNNB PYX 09 16.0 -36 36 The NGC number 2818 was associated with both this open cluster and the planetary nebula at the edge of it. Someone added the suffix “A” to the nebula so that they would have separate numbers. Regardless of human record keeping, the two objects are associated in the sky and are about 10,000 light years away. This is a very nice rich area of the Milky Way and this cluster and planetary stand out pretty well. They are certainly worth chasing on a sharp night. In the 13 inch scope, this cluster is pretty faint, pretty large, somewhat elongated and 16 stars were counted across a hazy background of very faint stars at 135X on a 5/10 night. On a much better night (7/10) this cluster was seen as pretty bright and I could resolve 34 members at 150X. The planetary nebula is pretty bright, pretty large, a little brighter in the middle and has fuzzy edges at 150X. It is located on the eastern edge of the open cluster. A few dark lanes are seen in the planetary at 285X; it is light green in color. From Australia, this object really shines (sorry about that). In the 5 inch refractor with an 18mm Ultrascopic eyepiece and no filter, the cluster resolves into 10 stars of magnitudes 10 and fainter. It is pretty faint, pretty large and has two double stars involved. The nebula is pretty large, faint, round, shows no central star and averted vision makes it larger. The OIII filter makes a big difference and now the planetary really stands out and it easy to see, pretty large and round. Moving up to the 12 inch Cassegrain with no filter gives a great view of the cluster; 42 stars are resolved and it is pretty bright, pretty large, pretty rich, compressed and shows many pairs within the cluster with a 40mm eyepiece. Going to the 30mm eyepiece the planetary is obvious, pretty bright, pretty large, a little elongated 1.2X1 and a hint of a dumbbell shape is seen. The UHC filter makes the contrast much better. The central star of the planetary was never seen.
This image of NGC 2818 is by Jim Barclay with a 14 inch SCT. Taurus Nebulosity M 1 SNREM TAU 05 34.5 +22 01 The Crab Nebula is one of the most studied objects in the sky. Once scientists realized that this little glowing cloud was the remains of a star that exploded in the year 1054, they really went all out to explain the inner workings and chemical makeup of this nebula. And the Crab did not disappoint them. There are a wide variety of atoms and molecules within the nebula.A fascinating neutron star beams out huge amounts of energy from the center of this growing cloud. With the 4 inch scope and a 22mm eyepiece it is pretty bright, pretty small, elongated 2X1 and shows off a pretty high surface brightness. Moving up to the Nexstar 11 and a 35mm eyepiece it is bright, pretty large and much elongated 2.5X1. There are no stars involved within the Crab Nebula at low magnification. Raising the power with a 14mm Ultra Wide eyepiece shows off a fascinating grey-green color. There are four stars involved, all at the edges; none of these stars is the central pulsar, which is 16th magnitude. High power does show a hint of the brighter “crablike appendages” that gave this object its nickname. The most prominent of these is a thin S-shape that runs from one end of the nebula to the other. These brightenings within the Crab Nebula are low surface brightness details that are helped by averted vision. This image of the Crab Nebula is by Chris Schur with a 12.5 inch f/5 Newtonian. It is taken in the wavelength of Hydrogen Alpha emission. Northern Winter Nebulae 81
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Astronomers’ Observing Guides
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Steven Coe Phoenix, AZ 85022 Stevec
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Contents Acknowledgments . . . . .
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Sagittarius Nebulosity . . . . . .
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Viewing the Sky 2 First is ease of
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Viewing the Sky 4 My large telescop
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Viewing the Sky 6 Those two telesco
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Viewing the Sky 8 • Ghost images
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Viewing the Sky 10 Along with eyepi
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Viewing the Sky 12 Fredericksen, an
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Becoming a Deep Sky Observer 14 Cha
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Becoming a Deep Sky Observer 16 Jim
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Becoming a Deep Sky Observer 18 era
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Using a Computer 20 Chapter 3 Using
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Using a Computer 22 Web Sites It is
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A Fun Night Under the Stars 24 Afte
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A Fun Night Under the Stars 26 As w
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Improving your Skills 28 the comple
Page 38 and 39: Improving your Skills 30 Knowing th
Page 40 and 41: Nebula Knowledge 32 Chapter 6 Nebul
Page 42 and 43: Nebula Knowledge 34 and a small, ho
Page 44 and 45: Nebula Knowledge 36 than iron deman
Page 46 and 47: Nebula Knowledge 38 that there are
Page 48 and 49: Nebula Knowledge 40 from the outer
Page 50 and 51: Northern Autumn Nebulae 42 Chapter
Page 52 and 53: Northern Autumn Nebulae 44 Here is
Page 54 and 55: Northern Autumn Nebulae 46 This ima
Page 56 and 57: Northern Autumn Nebulae 48 This ima
Page 58 and 59: Northern Autumn Nebulae 50 Image of
Page 60 and 61: Northern Autumn Nebulae 52 Grus Neb
Page 62 and 63: Northern Autumn Nebulae 54 This is
Page 64 and 65: Northern Autumn Nebulae 56 NGC 1624
Page 66 and 67: Northern Winter Nebulae 58 Chapter
Page 68 and 69: Northern Winter Nebulae 60 IC 2149
Page 70 and 71: Northern Winter Nebulae 62 This ima
Page 72 and 73: Northern Winter Nebulae 64 discover
Page 76 and 77: Northern Winter Nebulae 68 IC 443 S
Page 78 and 79: Northern Winter Nebulae 70 Monocero
Page 80 and 81: Northern Winter Nebulae 72 NGC 2261
Page 82 and 83: Northern Winter Nebulae 74 the sky
Page 90 and 91: Northern Winter Nebulae 82 M 45 CL+
Page 92 and 93: Northern Winter Nebulae 84 NGC 3132
Page 94 and 95: Northern Spring Nebulae 86 Chapter
Page 96 and 97: Northern Spring Nebulae 88 Using th
Page 98 and 99: Northern Spring Nebulae 90 tary neb
Page 100 and 101: Northern Spring Nebulae 92 they cou
Page 102 and 103: Northern Spring Nebulae 94 lished a
Page 104 and 105: Northern Spring Nebulae 96 This dar
Page 106 and 107: Northern Spring Nebulae 98 With A.J
Page 108 and 109: Northern Summer Nebulae 100 This im
Page 110 and 111: Northern Summer Nebulae 102 Ara Neb
Page 112 and 113: Northern Summer Nebulae 104 IC 1396
Page 114 and 115: Northern Summer Nebulae 106 Cygnus
Page 118 and 119: Northern Summer Nebulae 110 With th
Page 120 and 121: Northern Summer Nebulae 112 Ophiuch
Page 126 and 127: Northern Summer Nebulae 118 area is
Page 128 and 129: Northern Summer Nebulae 120 Vulpecu
Page 130 and 131: Nebulae are Just the Start 122 Chap
Page 132 and 133: 124 Appendix Object Other Type Con
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130 Appendix Object Other Type Con
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Index Abell 21 69 Abell 31 61 Abell
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Nebulae and How to Observe Them

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