A Visual Astronomer's Photographic Guide to the Deep Sky: A by Stefan Rumistrzewicz

By Stefan Rumistrzewicz

How again and again have you ever ‘found’ a deep sky item (DSO), ticked it off the checklist, and moved on, or used the ‘Tour’ functionality in your GO-TO ‘scope and acknowledged, ‘Oh that’s a only a smudge’ or ‘Can’t see it – I’ll circulation directly to the subsequent one.’ If this has occurred to you, then this publication is for you. it is going to problem you to return to the ‘smudge’ and very glance. are you able to see the faint wisp or the aspect within the southeastern nook? are you able to see the small cluster in the cluster? attempt to classify the open cluster for your self. examine it to the ‘accepted’ Trumpler type. even if you've a GO-TO ‘scope or no longer, this ebook will get you to rediscover one of many good stuff that bought you into this pastime within the first position – searching through the eyepiece of a telescope. So pack away the DSLR, CCD digital camera, the advisor ‘scope, and computing device and open your pencil case! You’re in for a few fun!

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Where practicable, there are comparative photos taken using either an 11” SCT or a 72mm refractor. All the photos show the unfiltered view. The field of view with the 11” SCT is approximately 23’ × 17’, whereas the 72mm refractor is approximately 45’ × 34’. , can you spot the extra detail? Some descriptions also include tips, for example: which is the most appropriate filter to use. Where objects are particularly faint, or difficult to distinguish from the field, white marker lines have been included.

The jury is still out…. ) M 73 11” SCT Constellation Observing Lists and Photos 35 M 73 72mm Refractor NGC 7009 This bright aqua-colored planetary nebula is named the Saturn Nebula, due to its oval shape and faint extensions (ansae). Can you see the faint outer nebulosity surrounding the bright oval shape (use high power)? Can you see the ansae? An UHC or an OIII filter will help. 36 NGC 7009 11” SCT NGC 7009 72mm Refractor Chapter 4 Constellation Observing Lists and Photos 37 NGC 7293 This apparently large planetary, known as the Helix Nebula, has a low surface brightness due to its size.

The stars show a range of brightness, and there are between 50 and 100 cluster members. Shapley–Sawyer Concentration Class for Globular Clusters Although not given in the following pages, this classification system is used for globular clusters (GC). Roman numerals are used, and the GCs are classified according to concentration along a 12-point scale (using Roman numerals) counting downwards. That is to say, XII is the least concentrated and I is the most. Examples would be: M 12 (in Ophiuchus) is IX; M 3 (in Canes Venatici) is VI and M 5 (in Serpens) is V.

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A Visual Astronomer's Photographic Guide to the Deep Sky: A by Stefan Rumistrzewicz
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