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LBN438 (Lac)
Click on the image for a larger version
| Date/Site: |
1., 2. and 3. September 2021. Remote observatory on the AAR club's site in Presberg |
Exposure/
Filter: |
R: 42 x 300 seconds,
G: 35 x 300 seconds,
B: 35 x 300 seconds,
L: 30 x 300 seconds (-20°C) |
| Camera: |
Moravian G3-16200 with Astronomik Type II-filters |
Optics/
Instrument: |
250mm f/4,7 Newton with VIP-3010 Paracorr on 10Micron GM1000 HPS |
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Guiding: ASI120 attached to a 61mm-finder,
focusing: Microtouch and FocusMax,
data acquired remotely using CCD-Commander, PHD_Broker with PHD2/multistar-guiding and MaximDL 6,
processing: MaximDL 6 and PixInsight 1.8 |
This tube is part of the larger "Lacerta Molecular Cloud". It dimly reflects the light of the surrounding stars. But a faint red glow can be seen at its northern end. This Extended Red Emission (ERE) is caused by photoluminescence of the dust in the cloud. It might be caused by energetic far-ultraviolet photons (FUV) absorbed by the dust which emits the energy in the red spectral region.
The cloud reminds me of CG4 in Puppis.
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© Friedhelm Hübner, last revision: 03.12.2023