Sharpless 139 (HII region)
From South El Monte , Sharpless 139 is visible all night. It will become visible at around 17:50 (PST), 63° above your northern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 18:49, 65° above your northern horizon. It will continue to be observable until around 01:43, when it sinks below 21° above your north-western horizon.
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Name
Sharpless 139
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Object type
HII region
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All times shown in South El Monte local time.