Celestial hemisphere:  Northern  ·  Constellation: Virgo (Vir)  ·  Contains:  NGC 4535
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NGC4535 (Lost Galaxy of Copeland), Ben Hayes
NGC4535 (Lost Galaxy of Copeland), Ben Hayes

NGC4535 (Lost Galaxy of Copeland)

Getting plate-solving status, please wait...
NGC4535 (Lost Galaxy of Copeland), Ben Hayes
NGC4535 (Lost Galaxy of Copeland), Ben Hayes

NGC4535 (Lost Galaxy of Copeland)

Equipment

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Acquisition details

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Description

By the time I read about this "lost" galaxy in Charles Bracken's book "The Astrophotography Planner," it was much too late in the 2023 galaxy season for me to start collecting 10-15 hours worth of data on such a hazy, dim target.  In May it was raining much of the time, but I got lucky in mid-June - we had two clear nights with no moon and no Canadian wildfire smoke!  At the last minute, I decided to set up the old LX200 SCT and go for it.   My heart sank when I realized how short a window of time I had to image it.  By the time the sky became dark enough to start collecting data (≈10:30 pm), I had only 2 hours before it dropped below the trees along on the western horizon.   In the end, all I could collect was 32 decent frames the first night and 41 the next, all at 180sec exposure. 

Data were collected using a ZWO ASI294MC camera (pixel size = 4.63µm) and UV-IR Cut filter.  The camera was rotated -60° (CCW) to frame the galaxy horizontally.  When coupled with an LX200 scope with focal reducer (focal length 1426.6mm), the ASI294 camera produces images with a resolution of 0.669 arcsec/px.  Not very good, but good enough for this beginner.  With a pitifully short integration time of only 3½ hours, I thought the results would be terrible.   But the data looked somewhat decent in their raw linear state (see below).   After stretching and increasing contrast and color saturation, I was excited to see the barred spiral arms and little galaxies in the margins. This image needs 20-24 more hours of data, but I thought I'd share it anyway.  I hope you image this galaxy too!

 NGC4525_PixInsight_linear_state.png

Figure 1.  Image in its linear state, after using GraXpertAI to remove background gradients and the BlurXTerminator deconvolution tool (settings: 0% sharpening 0%halos, 5.76PSF, correct first) to improve star shape and galaxy details.  73 frames x 180s (3 hrs 39 mins integration time).  FWHM: 5.765px    Ec: 53.1%.

Comments

Revisions

  • NGC4535 (Lost Galaxy of Copeland), Ben Hayes
    Original
  • NGC4535 (Lost Galaxy of Copeland), Ben Hayes
    B
  • Final
    NGC4535 (Lost Galaxy of Copeland), Ben Hayes
    C

B

Description: Full-frame version, which is how it looked through the 8" Meade LX200 "classic" telescope.

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C

Description: Close-up version of Copeland's "Lost" Galaxy (NGC4535). Same as Revision A, but without the acquisition details.

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Sky plot

Sky plot

Histogram

NGC4535 (Lost Galaxy of Copeland), Ben Hayes

In these public groups

Cloudy Nights