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NGC 225

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#1 cildarith



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Posted 14 December 2009 - 11:20 AM

Object Name: NGC 225
Also Known As: H.VIII.78, Cr 7, Lund 25, OCl 305, C 0040+615, [KPR2004b] 10, Sailboat Cluster, Broken Heart Cluster
Object Type: Open Cluster
Constellation: Cassiopeia
Right Ascension (2000.0): 00h 43m 36.4s
Declination (2000.0): +61° 46' 01"
Magnitude: 7.0
Diameter: 12'-15'
Trumpler Type: III 1 p n
Distance: 2,000 light years
Discovery: Caroline Herschel, September 27, 1783 (4.2" reflector)
NGC Description: Cl, L, lC, st 9…10

Telescope: Parks Astrolight EQ6 • 6" f/6 Newtonian Reflector
Eyepiece/Magnification: 20mm Parks Gold Series Plössl + 2x Barlow • 90x • 35' FoV
Date/Time: 16 November 2009 • 03:30-04:00 UT
Observing Location: Oakzanita Springs, San Diego Co., CA
Transparency: NELM 6.4, TLM 14.2
Seeing: Pickering 7-8
Conditions: Clear, cold, dry, some wind

Sketching Materials: #2 pencil, artists' chamois, ink, original sketch size 7.5" circle on 100# card stock 8.5" x 11" sheet.

Known as the Sailboat or Broken Heart Cluster, NGC 225 is a sparse young open cluster of moderate brightness (visible in binoculars from a dark sky site) lying halfway between the stars Gamma and Kappa Cassiopeiae. The stars are 9th magnitude and fainter, mostly blue and white with a single reddish specimen on western edge. Published estimates of the clusters apparent diameter range from 12 to 15 minutes of arc; the visual magnitude is consistently listed as 7.0. There is the slightest hint of nebulosity and/or unresolved stardust throughout the cluster. Some of this may be due to a reflection nebula known as van den Berg 4 surrounding an 11th magnitude star on the northern edge of the cluster. A bay of dark nebulosity protrudes from the north toward the heart of the cluster (LDN 1302), and the surrounding star field is somewhat patchy due to the presence of a couple of dark nebulae that lurk to the north and south of the cluster (LDN 1291 and LDN 1300, respectively). Among the two dozen or so stars that make up the cluster you will find the faint double star J Herschel 1046 (10.9, 12.2; 16.3"; 68°), with colors of white and ashen. The nearby star TYC 4016-386-1 is designated h 1046C in the Washington Double Star Catalog (at magnitude 11.2 it lies 53.1" away in position angle 335° - it also appears white). John Herschel's 1046th entry is a member of the star cluster discovered by his aunt, Caroline Herschel in 1784.

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#2 yann pothier

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Posted 14 December 2009 - 11:40 AM

Very pleasant drawing, Eric :)

#3 frank5817



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Posted 14 December 2009 - 11:57 AM


It has been too long since I have seen one of your beautiful sketches. This one is just superb. :bow: :rainbow:

Frank :)

#4 CarlosEH


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Posted 14 December 2009 - 12:28 PM


An excellent observation and report of NGC 225 in Cassiopeia. The cluster appers to shine in your fine rendering. I will have to review this cluster in the future. Thank you for sharing it with us all.

Happy Holidays and a Happy New Year!



#5 JayinUT


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Posted 14 December 2009 - 01:09 PM


Just looked at this OC in November and your rendering is just fantastic. You've captured the western curve wonderfully. Nicely done as always.

#6 Jef De Wit

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Posted 14 December 2009 - 01:47 PM

Nice report and beautiful sketch. I observed the cluster in October and noted "interesting" in my notes. Your work confirms that totaly!

#7 cildarith



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Posted 14 December 2009 - 04:47 PM

Thanks for the kind remarks, everyone! :)

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