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Contains:  IC 310, IC 312, IC 313, IC1907, IC308, IC310, IC312, IC313, IC316, NGC 1250, NGC 1260, NGC 1265, NGC 1267, NGC 1268, NGC 1272, NGC 1273, NGC 1275, NGC 1278, NGC 1282, NGC 1283, NGC1250, NGC1257, NGC1259, NGC1260, NGC1264, NGC1265, NGC1267, NGC1268, NGC1270, NGC1271, NGC1272, NGC1273, NGC1274, NGC1275, NGC1276, NGC1277, NGC1278, NGC1279, NGC1281, NGC1282, NGC1283, PGC12089, PGC12097, PGC12103, PGC12119, PGC12126, PGC12157, PGC12160, PGC12185, PGC12193, PGC12203, PGC12206, PGC12221, PGC12222, PGC12223, PGC12230, PGC12236, PGC12253, PGC12254, PGC12263, PGC12267, PGC12271, PGC12288, PGC12290, PGC12292, PGC12293, PGC12294, PGC12295, PGC12296, PGC12306, PGC12315, PGC12316, PGC12319, PGC12320, PGC12336, PGC12338, PGC12347, PGC12349, PGC12353, PGC12355, PGC12356, PGC12358, PGC12360, PGC12361, PGC12371, PGC12378, PGC12381, PGC12386, PGC12397, PGC12405, PGC12408, PGC12409, PGC12411, PGC12414, PGC12416, PGC12417, PGC12423, PGC12428, PGC12430, PGC12433, PGC12436, PGC12437, PGC12441, PGC12448, PGC12451, PGC12452, PGC12459, PGC12468, PGC12474, PGC12485, PGC12490, PGC12497, PGC12505, PGC12507, PGC12511, PGC12513, PGC12519, PGC12520, PGC12528, PGC12537, PGC12544, PGC12546, PGC12556, PGC12562, PGC12565, PGC12568, PGC12570, PGC12576, PGC12578, PGC12580, PGC12588, PGC213181, PGC213183, PGC213187, PGC215033, PGC2175539, PGC2175641, PGC2175744, PGC2176245, PGC2176360, PGC2176431, PGC2176730, PGC2176811, PGC2176828, PGC2177293, PGC2177592, PGC2177710, PGC2177985, PGC2178136, PGC2178465, PGC2178867, PGC2178928, PGC2178960, PGC2179112, PGC2179260, PGC2179280, PGC2179284, PGC2179363, PGC2179385, PGC2180221, PGC2180266, PGC2180406, PGC2180847, PGC2181110, PGC2181301, PGC2181376, PGC2181416, PGC2181565, PGC2182068, PGC2182115, PGC2182199, PGC2182223, PGC2182340, PGC2182454, PGC2183270, PGC2183354, PGC2183357, PGC2183589, PGC2183808, PGC2183996, PGC2184558, PGC2185151, PGC2185245, PGC2185472, PGC2186860, PGC2186889, PGC2186995, PGC2187025, PGC2187293, PGC2187553, PGC2187952, PGC2188742, PGC2189097, PGC2189439, PGC2190206, PGC2190255, PGC3084798, PGC3084851
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Fireflies in Perseus, 


            Glenn Diekmann
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Fireflies in Perseus

Technical card

Dates:Dec. 7, 2018Dec. 8, 2018Dec. 11, 2018

Astrodon Blue Tru-Balance E-Series Gen 2: 49x120" (gain: 76.00) -10C bin 1x1
Astrodon Green Tru-Balance E-Series Gen 2: 44x120" (gain: 76.00) -10C bin 1x1
Astrodon Luminance E-Series Gen 2: 270x60" (gain: 76.00) -10C bin 1x1
Astrodon Red Tru-Balance E-Series Gen 2: 48x120" (gain: 76.00) -10C bin 1x1

Integration: 9.2 hours

Darks: ~50

Flats: ~16

Bias: ~200

Avg. Moon age: 1.71 days

Avg. Moon phase: 5.74%

Bortle Dark-Sky Scale: 7.00

Mean SQM: 18.50 job: 3248691

RA center: 3h 18' 13"

DEC center: +41° 32' 3"

Pixel scale: 1.301 arcsec/pixel

Orientation: -179.504 degrees

Field radius: 0.768 degrees

Resolution: 3389x2568

Data source: Backyard


I don't know what possessed me to image a bunch of tiny, super-dim, wide-band objects from my light polluted back yard, but I'm glad I did. As is usually the case with my back yard projects, the processing of this image was an exercise in pulling useful signal out of the copious noise. I made heavy use of masks and different noise reduction techniques. The result, I think, is pretty good. If I were to do it again, I would double the focal length to get more resolution in the heart of this galaxy cluster.



Glenn Diekmann
License: None (All rights reserved)

Sky plot

Sky plot


Fireflies in Perseus, 


            Glenn Diekmann