A set of 7  Reference Line Maps, charts and DSS photos of M52 & NGC 7635, Caldwell Object C11 (Bubble Nebula) .  This series of maps has been developed for use with the Reference Line Method.  This method adapts well to both binoculars and telescopes.

Observing Notes:

1.  The reference line from Cassiopeia to Cepheus is all you need to find M52.

2.  Smyth’s description of M52  (References)  is very accurate:  “An irregular cluster of stars…the field is one of singular beauty.”

3.  If you don’t see the Bubble Nebula, it may be because your eye is not a camera.   The Bubble Nebula surrounds an 8.5 mag. star.  It  is difficult to see because of its low surface brightness.

How to Use Reference Line Maps to locate deep sky objects.
Credits, Links & Resources:

1. The images of galactic position of eemission nebulae, star clusters and planetary nebulae relative to our own Sun are provided courtesy of thinkastronomy.com.
2. A complete online resource for distances, sizes and locations of deep sky objects is available at seds.org.
3. Sky and Tleescope’s This Week’s Sky At A Glance is worth checking before every stargazing session.
4. Danko’s Clear Sky Chart provides a 48 hour forecast of observing conditions for every location in North America.
5. Reference Line Maps are produced by Project DeepSkyMap, a collaborative venture of observers who enjoy knowing the heavens and locating objects for themselves.


Click on Cover of Field Guide to download free trial at Amazon

Fall Nights Deep Sky Field Guide for the Backyard

Get three for the price of one at Amazon. Each guide can be used simultaneously on a laptop, cell phone and the Kindle. Although these field guides are designed for the liquid ink technology used on the Kindle, you need not own a Kindle to use them. The free “Kindle for PC” from Amazon allows these maps to be used with no glare from a laptop. Additionally, the iPhone and iPad versions, also available at Amazon,are fantastic. Get FREE Samples of these field guides at Amazon: Fall Nights Deep Sky Field Guide or Deep Sky Naked Eye Field Guide