The Cave Nebula (Sharpless 155)

From South El Monte , the Cave Nebula is visible all night. It will become visible at around 19:16 (PDT), 50° above your north-eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 22:09, 61° above your northern horizon. It will continue to be observable until around 05:24, when it sinks below 21° above your north-western horizon.
Name
The Cave Nebula (Sharpless 155)
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Object type
HII region
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All times shown in South El Monte local time.