CHALLENGE PLANETARY NEBULA
FINDER CHARTS

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Pease1 Page 2 Graphical Home Text Home

Page 2 has observation reports and a
terrific sketch of Pease 1 in M15.

1. Pease 1, near the center of the globular cluster M15 in the constellation Pegasus (This page), or 

2. GJJC 1 In Globular Cluster M22 in Sagittarius


Update 08/12/00: Finder Chart 2 has been updated, and a new Finder Chart 3 has been posted.  This will hopefully help others to find Pease 1 more easily.

UPDATE 11/15/99: A new image (false color) of M15 distinctly showing Pease1 has been sent in by Stan Moore.  This image is about 118KB, so if you desire to view it ,click here.  Includes technical information on the image. UPDATE 8/02/98: Location Chart 2 has been corrected with the kind assistance of  Leos Ondra, who has also provided more interesting information on Pease1.

The following three images should aid in locating this most challenging planetary nebula.  In addition, Dave Jurasevich's recent observation report can be extremely helpful for pinpointing Pease1.

You will need extreme patience, an OIII filter, very dark skies, a 12" telescope at the minimum (clock drive highly recommended), high power eyepieces, and I recommend at least one observing partner to help tackle this one!  Once in the area indicated by the blue circle on the lower images, use the OIII filter to blink the field of view and the object that does not greatly diminish in brightness will be the planetary. GOOD LUCK!

I have located a VERY informative web article on Pease1 written by Leos Ondra and am providing a link to it near the bottom of this page. It is entitled `A Golden Planetary' and provides historical and current information on the research of this obscure, but important and interesting planetary nebula.

Click HERE to view a recent Hubble Space Telescope color image of Pease1 and a good part of M15 (Pease1 is the pinkish object at the upper left). Click HERE to view a Close-Up False Color image of Pease1 (Kustner648, K648) from the HST.  For additional data & information on these images, please visit this STScI web page.  This HST info added on 9/7/00.


Pease 1 Finder Chart 1 of 3
Find the 4 trapezium stars inside the 'box', then proceed to the next finder chart. These stars are only the start of a grand star-hoppin' adventure.  In these images, North is up, and West is to the right.

 

Pease 1 Finder Chart 2 of 3
Use the 4 trapezium stars in the 'box' as starters; first you want to locate star 'D by star-hopping from 'A' to 'B' to 'C' and then to 'D' (green lines). Stars A, B, C, and D have similar magnitudes, although B and C are slightly fainter. Once you have located 'D', then draw an imaginary line between stars 'A' and 'D'. Continue this line through to where star 'E' is (about 20 arc seconds SE).  When you have located star 'E', then use Finder Chart 3 which is a modified Hubble image.

 

Pease 1 Finder Chart 3 of 3
From star 'E' continue the line SE not quite half an arc minute until you can observe a small clump of stars. (I know, everything in the field is a clump of stars!) Notice that of the three stars circled, the PN is the object just slightly to the northwest.
PNe Mag.= 14.9, Surface Brightness = 6, and the angular size of the PN = 1" (arc second). 

 Any observer that takes on this challenge and successfully locates and confirms this planetary nebula will definitely get front page billing on my web site.

mailto: douglas@blackskies.org

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More Pease1 Information (off site)