Objects in your sky: Deep Sky
by Dominic Ford
Open clusters
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NGC1977 (mag 0.0) is visible from soon after it rises, at 05:45, until soon before it sets at 17:02. Always take extreme caution when trying to make daytime observations of the Moon while the Sun is above the horizon.
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Collinder 50 (mag 1.0) is visible in the dawn sky, rising at 02:44 (CEST) – 2 hours and 45 minutes before the Sun – and reaching an altitude of 13° above the eastern horizon before fading from view as dawn breaks at around 04:24.
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M45 (mag 1.3) is visible in the dawn sky, rising at 01:09 (CEST) and reaching an altitude of 24° above the eastern horizon before fading from view as dawn breaks at around 04:17.
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IC4665 (mag 4.2) is visible all night. It will become visible at around 23:51 (CEST), 43° above your southern horizon, as dusk fades to darkness. It will be lost to dawn twilight at around 03:22, 24° above your south-western horizon.
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Caldwell 14 (mag 4.3) is visible all night because it is circumpolar. It will be highest in the sky shortly before dawn, when it will be lost to twilight at around 03:22, 50° above your north-eastern horizon. At dusk, it will become visible at around 23:51 (CEST), 28° above your north-eastern horizon.
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NGC6633 (mag 4.6) is visible all night. It will become visible at around 23:51 (CEST), 43° above your southern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 00:17, 44° above your southern horizon. It will be lost to dawn twilight at around 03:22, 30° above your south-western horizon.
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IC4756 (mag 4.6) is visible all night. It will become visible at around 23:51 (CEST), 42° above your southern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 00:29, 43° above your southern horizon. It will be lost to dawn twilight at around 03:22, 31° above your south-western horizon.
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Globular clusters
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M5 (mag 5.7) will become visible at around 23:51 (CEST), 28° above your south-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 03:20.
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M13 (mag 5.8) is visible all night. It will become visible at around 23:51 (CEST), 68° above your south-western horizon, as dusk fades to darkness. It will be lost to dawn twilight at around 03:22, 38° above your western horizon.
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M12 (mag 6.1) will become visible at around 23:51 (CEST), 33° above your south-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 04:27.
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M3 (mag 6.3) will become visible at around 23:51 (CEST), 36° above your western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 04:33.
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M15 (mag 6.3) is visible all night. It will become visible at around 23:51 (CEST), 32° above your south-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 03:19, 49° above your southern horizon. It will be lost to dawn twilight at around 03:22, 49° above your southern horizon.
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M92 (mag 6.5) is visible all night. It will become visible at around 23:51 (CEST), 77° above your south-western horizon, as dusk fades to darkness. It will be lost to dawn twilight at around 03:22, 47° above your western horizon.
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M2 (mag 6.6) is visible in the dawn sky, rising at 21:23 (CEST) and reaching an altitude of 36° above the southern horizon before fading from view as dawn breaks at around 03:22.
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M10 (mag 6.6) will become visible at around 23:51 (CEST), 31° above your southern horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 04:26.
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Galaxies
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M31 (mag 3.4) is visible all night. It will become visible at around 23:49 (CEST), 26° above your north-eastern horizon, as dusk fades to darkness. It will be lost to dawn twilight at around 03:23, 56° above your eastern horizon.
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M33 (mag 5.8) is visible in the dawn sky, rising at 21:55 (CEST) and reaching an altitude of 41° above the eastern horizon before fading from view as dawn breaks at around 03:22.
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M81 (mag 6.9) is very well placed – it is close enough to the north celestial pole that it is high above the horizon all night.
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M101 (mag 7.9) is visible all night because it is circumpolar. It will be highest in the sky at dusk, becoming accessible at around 23:51 (CEST), 54° above your north-western horizon. It will be lost to dawn twilight at around 03:22, 30° above your north-western horizon.
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M94 (mag 8.2) will become visible at around 23:51 (CEST), 37° above your western horizon, as dusk fades to darkness. It will then sink towards the horizon, becoming tricky to observe after 01:52 when it dips 21° above your north-western horizon.
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M51 (mag 8.4) will become visible at around 23:51 (CEST), 46° above your western horizon, as dusk fades to darkness. It will then sink towards the horizon, becoming tricky to observe after 03:16 when it dips 21° above your north-western horizon.
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NGC2403 (mag 8.9) is very well placed – it is close enough to the north celestial pole that it is high above the horizon all night.
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Nebulae
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Caldwell 49 (mag 0.0) is visible from soon after it rises, at 05:50, until soon before it sets at 18:50. Always take extreme caution when trying to make daytime observations of the Moon while the Sun is above the horizon.
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