Nebulae and How to Observe Them

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Northern Winter Nebulae 76 This image of NGC 2024 was taken by Chris Schur with a 12.5 inch f/5 Newtonian. into the nebula on the south side. There are three stars involved within the nebula. Because of the large, parallel dark lanes, Arizona astronomers have taken to calling NGC 2024 the “Tank Track” Nebula. B 33 DRKNB ORI 05 40.9 -02 28 IC 434 BRTNB ORI 05 41.0 -02 24 I have always said that Barnard 33, the Horsehead Nebula, is a photographic object. It just shows up on a good photograph so much better than an observation with the human eye. With the Nexstar 11 and a 14mm eyepiece there is a small notch in the IC 434 nebulous streamer. This nebula is low contrast, so the Horsehead just shows up as a missing section of a very faint glowing band. It can only be seen on nights of excellent contrast. This dark marking has never been easy in any telescope I have owned.
This image of the Horsehead nebula (B 33) is from Chris Schur with a 12.5 inch f/5 Newtonian. Using Ken Reeve’s 20 inch f/5 Newtonian on a night I rated 8 out of 10 for transparency does make some difference. Even without a filter the missing section of the nebula is pretty easy. There is a double star at the “neck” of the Horsehead dark nebula and that points the way to the dark area. It might be easier, but it is still a low-contrast object, even with the big scope and a very good night. Sh2-276 BRTNB ORI 05 48.0 +01 00 This giant-sized nebula is a low surface brightness object and the arc is centered on the Sword of Orion. It was discovered by E.E. Barnard on photographs he took 100 years ago. It is therefore known as Barnard’s Loop. It was created when giant stars in the Sword of Orion spewed out gas and dust by the thousands of billions of tons in the distant past and now you can see that nebula with your naked eye. Yes, I said with your naked eye, and the help of a modern filter. From a very dark location on a great night, just holding the UHC filter up to my eye showed a faint, but not extremely difficult, arc of nebulosity to the east of the Belt of Orion. Make certain that you are well dark-adapted before trying this observation. In the 8X42 binoculars and no filter, seeing Barnard’s Loop is more of a test of the evening than your vision. From a mediocre site on a 5/10 night I could not see any of the nebula. On a much better 8/10 night it was not difficult and about 4 degrees of the arc were seen with averted vision in the binoculars. The Sharpless 2-276 designation seems to cover the entire arc of nebulosity. In the brand new 35 mm Panoptic that I bought just for this type of observation, it is very faint, extremely large and looks like a very, very elongated streamer with the 13 inch. A little cluster, NGC 2112, is a good marker for the nebulosity; it passes right over this clump of a dozen pretty faint stars. Then the streamer of nebulosity extends about 3 degrees on either side of this cluster. The UHC filter helps very much, and so does averted vision: this nebulous streamer shows much better contrast out of the corner of my eye. Northern Winter Nebulae 77
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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
Page 34 and 35: A Fun Night Under the Stars 26 As w
Page 36 and 37: 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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126 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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