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Thread: An Hour of H2 Galaxies Before Moonrise

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    Arctic's Avatar
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    Default An Hour of H2 Galaxies Before Moonrise



    I took out the 8-inch last night to take advantage of the coincidence of clear, smoke-free skies to add to my H2 observations. The sky was excellent and transparent, but moonrise would occur only an hour after the end of twilight. Being late summer, the mosquitoes were pretty scarce--soon to be gone until next June.

    With Canes Venatici sliding down into the northwest, soon to be out of reach until spring, I observed the following galaxies:

    NGC 5023 (mag 12.3, Surface Brightness 13.5-14.0). Surprisingly, this one is not shown in the Interstellarum Deep Sky Atlas. But no matter. It would be a tough one to find anyway without a deeper chart due to the scarcity of field stars. I printed off a chart from the online Dreistein Deep Sky Atlas, which at the scale I chose showed stars to mag 11, and found the field in the scope. There was no sign go the galaxy until the sky was completely dark, when a very dim, thin streak of fuzz appeared at 182X. The best view was at 100x. The low surface brightness of this object is its main challenge.

    NGC 5103 (12.6/12.7) and 5383 (11.4/13.4) were found fairly easily--smudges of light with reasonably bright surface brightness. While in the neighborhood, I snapped up NGC 5362 (12.3/12.9), which is not an H2 object. Not difficult.

    Moving to Draco I viewed the following galaxies:

    NGC 6015 (11.1/13.8). This one was easy to find and pretty easy to see. NGC 6340 (11.0/13.2) was bright (relatively speaking) and also easy to find. Plenty of field stars in this region make star-hopping with the finder very enjoyable.

    Lastly, I viewed NGC 6324 (12.8/11.8), another featureless, faint fuzzy that is not part of the H2 list. By now the eastern sky was rapidly brightening from the impending moonrise, and I called it a night.
    Gordon
    Scopes: Meade LX10 8" SCT, Explore Scientific AR102 Refractor on ES Twilight 1 Mount, Oberwerks 15X70 Binos, Orion 10X50 Binos.
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    2017 Total Solar Eclipse

  2. The Following 4 Users Say Thank You to Arctic For This Useful Post:

    bladekeeper (08-22-2019),j.gardavsky (08-21-2019),John Baars (08-22-2019),Makuser (08-22-2019)

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    Default Re: An Hour of H2 Galaxies Before Moonrise

    Hi Gordon. A very nice report from you here. You caught some nice NGC objects before the moon rose and hampered everything. Thanks for your excellent report Gordon, and keep looking up.
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    Default Re: An Hour of H2 Galaxies Before Moonrise

    Thanks for your nice report. NGC 5023 mut have been quite a victory!
    Arctic likes this.
    Telescopes in Schiedam : SW 150 F/5 Achromat, SW Evostar 120ED F/7.5, Vixen 102ED F/9, OMC140 maksutov F/14.3, SW 102MAK F/13 on Vixen GPDX.
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