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This page and subpages are part of an experiment on incorporating real-time data in a learning resource. A bot automatically updates the subpages which include new measurements from a sensor once per hour. The image and image caption are usually updated once per day. See SkyCam for more info.

The data is collected from Ladd Observatory in Providence (Lua error: callParserFunction: function "#coordinates" was not found.)

A recent image of the sky above Providence from Ladd Observatory. A new image dynamically appears here each day. The timestamp below shows when the current version of the image was taken.
Last image filename: 00002725.FIT
Exposure started: 2019-02-16T07:13:46.825 UTC
Exposure time: 10 seconds

Archived example images[edit]

Depending on the local weather the image might be completely blank due to thick cloud cover or it might show an image of stars. A complete list of uploaded images can be found in the image file history. Here are explanations of a few selected images.

Overexposed image taken during bright twilight.

Overcast with raindrops on camera window.

Mostly cloudy.

Clear with stars but hazy.

Sky Camera image info[edit]

Key to User:Mu301Bot/nelm/image

  • Last image filename = the raw FITS data file name
  • Exposure started = timestamp of raw data file (UTC)
  • Image updated = timestamp of upload to webserver (Eastern Time Zone EST/EDT)
  • Image source: Sky Camera

Zenith Sky Brightness data[edit]

Graph of sky brightness in Providence, RI. (Jan. 27-28, 2016)

Key to User:Mu301Bot/nelm/data

  • mpsas = visual magnitude per square arc second [1]
  • nelm = approximate naked eye limiting magnitude [2] (unused)
  • source = Sky Brightness Meter
  • date and time = timestamp of data point (Eastern Time Zone EST/EDT)
  • temperature = internal temperature of sensor

Note: new data is only collected when the sky is dark enough.

  1. w:Background (astronomy)
  2. w:Bortle scale

Zenith Sky Brightness data[edit]

date      time      mpsas    temperature
20181230  16:00:03  06.57m  019.3C
20181230  17:00:03  14.94m  016.1C
20181230  18:00:03  18.73m  015.4C
20181230  19:00:03  18.75m  015.4C
20181230  20:00:03  18.78m  015.1C
20181230  21:00:03  18.79m  014.5C
20181230  22:00:03  16.91m  014.8C
20181230  23:00:03  16.58m  016.4C
20181231  00:00:03  17.26m  017.0C
20181231  01:00:03  17.01m  016.7C
20181231  02:00:03  18.95m  015.4C
20181231  03:00:03  18.91m  015.1C
20181231  04:00:03  18.75m  014.8C
20181231  05:00:03  18.59m  014.5C
20181231  06:00:03  18.43m  014.8C
20181231  07:00:03  09.92m  014.8C
20181231  16:00:04  07.18m  020.6C
20181231  17:00:04  14.72m  020.3C
20181231  18:00:04  15.45m  020.3C
20181231  19:00:04  15.77m  018.6C
20181231  20:00:04  15.50m  017.7C
20181231  21:00:04  15.45m  017.7C
20181231  22:00:04  15.58m  018.0C
20181231  23:00:04  15.57m  018.0C