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 05:42, until soon before it sets at 17:22. 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 03:36 (PDT) – 2 hours and 7 minutes before the Sun – and reaching an altitude of 16° above the eastern horizon before fading from view as dawn breaks at around 05:02.
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M45 (mag 1.3) is visible in the dawn sky, rising at 02:31 (PDT) – 3 hours and 12 minutes before the Sun – and reaching an altitude of 27° above the eastern horizon before fading from view as dawn breaks at around 04:59.
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M7 (mag 3.3) is visible between 22:00 and 01:37. It will become accessible at around 22:00, when it rises to an altitude of 16° above your south-eastern horizon. It will reach its highest point in the sky at 23:48, 21° above your southern horizon. It will become inaccessible at around 01:37 when it sinks below 16° above your south-western horizon.
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M6 (mag 4.2) is visible between 21:40 and 01:30. It will become accessible at around 21:40, when it rises to an altitude of 18° above your south-eastern horizon. It will reach its highest point in the sky at 23:35, 23° above your southern horizon. It will become inaccessible at around 01:30 when it sinks below 18° above your south-western horizon.
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IC4665 (mag 4.2) is visible in the evening sky, becoming accessible around 21:17 (PDT), 46° above your south-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 23:41, 61° above your southern horizon. It will continue to be observable until around 04:27, when it sinks below 18° above your western horizon.
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Caldwell 14 (mag 4.3) is visible in the dawn sky, becoming accessible around 00:58 (PDT), when it reaches an altitude of 18° above your north-eastern horizon. It will then reach an altitude of 45° before fading from view as dawn breaks at 04:32.
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NGC6633 (mag 4.6) is visible all night. It will become visible at around 21:17 (PDT), 39° above your eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 00:26, 62° above your southern horizon. It will be lost to dawn twilight at around 04:32, 26° above your western horizon.
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IC4756 (mag 4.6) is visible all night. It will become visible at around 21:17 (PDT), 36° above your eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 00:37, 61° above your southern horizon. It will be lost to dawn twilight at around 04:32, 28° above your western horizon.
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Globular clusters
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M22 (mag 5.2) is visible between 21:53 and 03:17. It will become accessible at around 21:53, when it rises to an altitude of 20° above your south-eastern horizon. It will reach its highest point in the sky at 00:35, 32° above your southern horizon. It will become inaccessible at around 03:17 when it sinks below 20° above your south-western horizon.
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M4 (mag 5.4) is visible in the evening sky, becoming accessible around 21:17 (PDT), 27° above your southern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 22:18, 29° above your southern horizon. It will continue to be observable until around 00:40, when it sinks below 20° above your south-western horizon.
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M5 (mag 5.7) will become visible at around 21:17 (PDT), 58° above your southern horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 03:22.
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M13 (mag 5.8) is visible in the evening sky, becoming accessible around 21:17 (PDT), 73° above your eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 22:36, 87° above your northern horizon. It will continue to be observable until around 04:24, when it sinks below 21° above your north-western horizon.
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M12 (mag 6.1) is visible in the evening sky, becoming accessible around 21:17 (PDT), 48° above your south-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 22:42, 54° above your southern horizon. It will continue to be observable until around 02:48, when it sinks below 21° above your western horizon.
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M3 (mag 6.3) will become visible at around 21:17 (PDT), 67° above your western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 03:06.
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M15 (mag 6.3) is visible in the morning sky, becoming accessible around 22:42, when it reaches an altitude of 21° above your eastern horizon. It will then reach its highest point in the sky at 03:28, 68° above your southern horizon. It will be lost to dawn twilight around 04:32, 63° above your south-western horizon.
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M55 (mag 6.3) is visible between 00:14 and 03:03. It will become accessible at around 00:14, when it rises to an altitude of 21° above your southern horizon. It will reach its highest point in the sky at 01:38, 24° above your southern horizon. It will become inaccessible at around 03:03 when it sinks below 21° above your southern horizon.
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M62 (mag 6.4) is visible between 21:21 and 00:31. It will become accessible at around 21:21, when it rises to an altitude of 21° above your south-eastern horizon. It will reach its highest point in the sky at 22:56, 25° above your southern horizon. It will become inaccessible at around 00:31 when it sinks below 21° above your southern horizon.
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M92 (mag 6.5) is visible all night. It will become visible at around 21:17 (PDT), 65° above your north-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 23:12, 80° above your northern horizon. It will be lost to dawn twilight at around 04:32, 29° above your north-western horizon.
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M2 (mag 6.6) is visible in the morning sky, becoming accessible around 23:21, when it reaches an altitude of 21° above your eastern horizon. It will then reach its highest point in the sky at 03:31, 55° above your southern horizon. It will be lost to dawn twilight around 04:32, 52° above your south-western horizon.
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M10 (mag 6.6) is visible in the evening sky, becoming accessible around 21:17 (PDT), 45° above your south-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 22:52, 51° above your southern horizon. It will continue to be observable until around 02:51, when it sinks below 21° above your western horizon.
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Galaxies
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M31 (mag 3.4) is visible in the dawn sky, rising at 22:10 (PDT) and reaching an altitude of 63° above the north-eastern horizon before fading from view as dawn breaks at around 04:33.
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M33 (mag 5.8) is visible in the dawn sky, rising at 23:53 (PDT) and reaching an altitude of 52° above the eastern horizon before fading from view as dawn breaks at around 04:32.
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M81 (mag 6.9) is visible all night because it is circumpolar. It will be highest in the sky at dusk, becoming accessible at around 21:17 (PDT), 34° above your north-western horizon. It will be lost to dawn twilight at around 04:32, 13° above your northern horizon.
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NGC253 (mag 7.1) is visible in the dawn sky, rising at 01:56 (PDT) – 3 hours and 47 minutes before the Sun – and reaching an altitude of 22° above the south-eastern horizon before fading from view as dawn breaks at around 04:32.
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M101 (mag 7.9) will become visible at around 21:17 (PDT), 65° above your north-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 06:56.
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M94 (mag 8.2) will become visible at around 21:17 (PDT), 59° above your north-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 03:15.
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M51 (mag 8.4) will become visible at around 21:17 (PDT), 65° above your north-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 04:39.
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M104 (mag 8.6) will become visible at around 21:17 (PDT), 30° above your south-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting at 00:06.
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Nebulae
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Caldwell 49 (mag 0.0) is visible from soon after it rises, at 06:12, until soon before it sets at 18:45. Always take extreme caution when trying to make daytime observations of the Moon while the Sun is above the horizon.
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M8 (mag 5.8) is visible between 21:32 and 02:32. It will become accessible at around 21:32, when it rises to an altitude of 21° above your south-eastern horizon. It will reach its highest point in the sky at 00:02, 31° above your southern horizon. It will become inaccessible at around 02:32 when it sinks below 21° above your south-western horizon.
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