Nebulae and How to Observe Them (Astronomers' Observing Guides)
Language: English
Pages: 156
ISBN: 1846284821
Format: PDF / Kindle (mobi) / ePub
This book presents an up-to-date detailed description and categorisation of the large range of astronomical objects that fall under the general heading of nebulae, and then instructs the reader in the best ways to successfully observe and record them. Nebulae and How to Observe Them is a comprehensive mine of information for all levels of amateur observers, from the beginner to the experienced.
Coming of Age in the Milky Way
Getting Started: Long Exposure Astrophotography
Saturn and How to Observe It (Astronomers' Observing Guides)
A Brief History of Time (Updated and Expanded 10th Anniversary Edition)
Are usually on Channel 19, and Channel 9 is for real emergencies, so choose a channel far from those. We generally get on the road early enough in the afternoon so that we are at the site before sunset. This allows for an hour of setup time during twilight. A Fun Night Under the Stars At the Site We generally park the vehicles in a side-by-side configuration; this seems to give the most room for everyone to work from the end of their vehicle. I have a folding table that has proven very handy for.
Helpful to you is acquiring some knowledge about the cardinal directions in the eyepiece of your scope. This way, as you are observing and trying to use a star chart, you will know which directions are which. Just push the scope toward the north (at Polaris) and the side of the field of view where stars are entering the field is north. Those of you who live south of the equator can push the end of the tube toward Octans. OK, underneath the South- Improving your Skills ern Cross will be close.
Harold Corwin’s calculation shows that it has a surface brightness of 16.6 magnitudes per square arc minute. That is a faint object. With a 10 inch f/5 RFT, Jones 1 was just barely seen. On a night I rated at 8/10 for transparency, I could just barely detect this object with a 14 mm Ultra Wide Angle eyepiece and no filter. Adding the UHC filter made a big difference. The contrast of the nebula was increased very much and I could show this object to several other observers. This was before I owned.
Of these objects can be seen at 200X. However, NGC 5461 is difficult and was never held steady. NGC 5462 was seen as the brightest spot in the spiral arms of M 101 on this night. Northern Spring Nebulae NGC 5447 and 5450 are very close together. On a night rated 7/10 for seeing and 9/10 for transparency, the two nebulae are seen as pretty faint, pretty small and much elongated (2.5X1). Averted vision makes them much more easily seen. That observation is with my Nexstar 11 at 200X. Using A.J.
DRKNB CRU CRU CRU CRU CRV CYG 12 12 12 12 12 19 08.4 23.8 28.8 28.7 24.5 59.0 −64 −60 −63 −62 −18 +35 12 14 44 06 47 00 12.4 12.7 11.7 12.9 10.9 none 16 s 30 s 34 s 6s 80 s 360 m B145 B146 LDN 865 LDN 860 DRKNB DRKNB CYG CYG 20 02.8 20 03.5 +37 40 +36 02 none none 35 m 1m B157 LDN 1075 DRKNB CYG 21 33.7 +54 40 none 4m B164 B168 LDN 1070 DRKNB DRKNB CYG CYG 21 46.5 21 53.2 +51 04 +47 12 none none 12 m 100 m 6m 5KG 5 Ir B343 LDN 880 DRKNB CYG 20 13.5 +40 16.