Celestial hemisphere:  Northern  ·  Constellation: Aquila (Aql)  ·  Contains:  50 gam Aql  ·  B142  ·  B143  ·  LDN 687  ·  LDN 688  ·  LDN 689  ·  LDN 690  ·  LDN 694  ·  LDN 695  ·  LDN 700  ·  Tarazed  ·  The star Tarazed (γAql)
LDN 688 & 694 (B142 & B143)  - LRGB, Michael J. Mangieri
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LDN 688 & 694 (B142 & B143) - LRGB

LDN 688 & 694 (B142 & B143)  - LRGB, Michael J. Mangieri
Powered byPixInsight

LDN 688 & 694 (B142 & B143) - LRGB

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Description

LDN 688 & 694 (B142 & B143), collectively known as Barnard's 'E' nebula, gets it's name from the distinctive 'E' shape of the dark nebula that obscures the dense background of stars. The pair is also known as the Triple Cave Nebula. Although it appears that the two nebula are part of the same structure, they are, in fact, two distinct objects. It is our brain that wants to combine them into a familiar symbol, and so it appears as a single object.

The bright star to the left is Gamma Aquilae (Tarazed). Gamma Aquilae is a relatively young star with an age of about 270 million years, estimated to be 3.5 times the mass of the Sun and about 92 times the Sun's radius. Shining at over 2100 times the luminosity of the Sun this K-type star glows with an orange hue.

Comments

Revisions

  • LDN 688 & 694 (B142 & B143)  - LRGB, Michael J. Mangieri
    Original
  • Final
    LDN 688 & 694 (B142 & B143)  - LRGB, Michael J. Mangieri
    B

B

Description: After uploading the initial image I realized that Tarazed wasn't showing orange. Oops. I messed up the color calibration. This revision fixes that.

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Sky plot

Sky plot

Histogram

LDN 688 & 694 (B142 & B143)  - LRGB, Michael J. Mangieri