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Comet 21P/Giacobini-Zinner Visits the Heart And Soul Nebulae | by TransientAstronomer
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Comet 21P/Giacobini-Zinner Visits the Heart And Soul Nebulae

In this two-panel mosaic image from Aug. 17, 2018 (comet stack from 1:08 to 2:27 a.m. PDT), the aquamarine Comet 21P/Giacobini-Zinner passes by the Heart and Soul Nebulae on its most recent trip into the inner solar system.

 

A periodic comet, 21P was first discovered by Michel Giacobini of Nice, France, in December 1900 and was later recovered by Ernst Zinner in October 1913. It now bears their names. It has a period of about 6.6 years and is responsible for the Draconids Meteor Shower, which occurs every October, peaking on or around Oct. 8. As a lucky coincidence, on its current journey towards perihelion (Sept. 10), the closest point in its orbit to the sun, it passed by the Heart and Soul Nebulae in Earth's night sky. The Heart and Soul Nebulae glow red due to ionized hydrogen excited by very bright nearby stars. Both the Heart and the Soul Nebula are around 7,500 light-years distant, while 21P is much closer, around 71.5 million km or 3.97 light-minutes form Earth.

 

21P/Giacobini-Zinner: en.wikipedia.org/wiki/21P/Giacobini%E2%80%93Zinner

 

21P via The Sky Live: theskylive.com/21p-info

 

Heart Nebula: en.wikipedia.org/wiki/Heart_Nebula

 

Soul Nebula: en.wikipedia.org/wiki/Westerhout_5

 

Technical Info:

 

~20x240" two-panel mosaic at 1600ISO

15x Dark

20x Bias

 

Camera: Canon 6D Hutech UV/IR Mod

Telescope: William Optics Star 71 Astrograph

Reveal Focus Filter by David Lane

Mount: Celestron Advanced VX

Guide Scope: Orion Mag Mini With SSAG

 

Capture Software: Backyard EOS

Stacking: Deep Sky Stacker

Processing: Photoshop CC, PixInsight

 

Date: 8/17/2018 1:08-2:27am PDT for the comet stack

Location: Los Padres National Forest, CA

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Uploaded on August 17, 2018