IC 1396 e vdB 142 (nebulosa "proboscide d'elefante") - IC 1396 and vbB 142 (Elephant Trunk Nebula)

IC 1396 è un ammasso aperto molto sparso associato a una vasta nebulosa diffusa, visibile nella costellazione boreale di Cefeo; si trova in un tratto di Via Lattea parzialmente oscurato da densi banchi di nebulose oscure, in una regione galattica ricca di polveri e gas con associate stelle giovani e calde.
La nebulosa è di aspetto grossomodo circolare: la combinazione di telescopio e sensore usati per riprendere questa immagine non ha consentito di riprenderla per intero, ma nell’immagine se ne intuisce la forma circolare.
Tutta la nebulosa è attraversata da numerose macchie scure, che ad un'analisi più attenta si rivelano essere dei globuli di Bok, ossia regioni della nebulosa particolarmente concentrate dove avviene la formazione di nuove stelle.
Si tratta dunque di una regione H II, e fa parte di un vasto sistema di nubi molecolari e associazioni OB chiamato Complesso nebuloso di Cefeo.
Una particolare nebulosa oscura che si sovrappone all'oggetto viene chiamata anche Proboscide d'Elefante ed è identificata con la sigla vdb 142. Tutto il complesso nebulare dista dal Sole circa 3000 anni-luce.

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IC 1396 is a very scattered open cluster associated with a large diffuse nebula, visible in the boreal constellation of Cepheus; it is located in a stretch of the Milky Way partially obscured by dense banks of dark nebulae, in a galactic region rich in dust and gas with associated young and hot stars.
The nebula has a roughly circular appearance: the combination of telescope and sensor used to take this image did not allow it to be taken in full, but in the image you can guess its circular shape.
The whole nebula is crossed by numerous dark spots, which on closer analysis turn out to be Bok globules, that is particularly concentrated regions of the nebula where the formation of new stars takes place.
It is therefore an H II region, and is part of a vast system of molecular clouds and OB associations called the Cepheus Cloud Complex.
A particular dark nebula that overlaps the object is also called Elephant's Trunk and is identified with the initials vdb 142.
The whole nebula complex is about 3000 light-years from the Sun.

Technical details
Apo refractor 130/910 with Riccardi 0.75x focal reducer (692mm focal lenght, f/5.2)
Mount EQ8
CCD camera Moravian G3-16200 with filters Baader RGB, Ha 7nm
Exposures details:
R 30x300" bin1 -15C
G 28x300" bin1 -15C
B 25x300" bin1 -15C
Ha 40x600" bin1 -15C
Total integration time 13h35'
Acquisition: Voyager, PHD2
Processing: Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator
SQM-L 18.5 mag/arcsec2
Images obtained through 3 nights in September 2022 from my home terrace

www.robertomarinoni.com

Taken on: November 5, 2022

Tags:

vdB142

cefeo

nebulosa

nebula

IC 1396 « less

Sets appears in: • Astronomy

Groups appears in: • Astrophotography - Astronomy - Astrophysics • Deep Space Astrophotography more » • APOD Submissions « less

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