Objects: Vdb141 And Ngc7023 - Ghost And Iris Nebulae In Cepheus

Άλλη μία φωτογραφία μου από τις φετινές αστροβραδιές στον Πάρνωνα. Τα fits ήταν αρκετά καλά και η επεξεργασία ολοκληρώθηκε πολύ ποιό αβασάνιστα από ότι περίμενα Την αφιερώνω στην Χριστίνα που άντεξε να μου κάνει παρέα μέχρι το ξημέρωμα όταν πήρα το RGB (και περίμενε να πάρω και flats)!

Objects: VDB 141 and NGC 7023 - Ghost and Iris Nebulae in Cepheus

Type: Reflection

Constellation : Cepheus

Distance: ~1200 Light years

Tech Specs:

Location: Mount Parnonas - Greece

Date: 11-12 July 2012

Scope: Officina Stellare Hyper APO 80 @ f4.8

FF/FR: Televue 0.8x Photo Reducer/Flattener

Camera: QHY9 KAF8300 Mono

Chip Temperature: -20 C

Filters: Astronomik L-R-G-B

Mount: Skywatcher NEQ6 PRO + EQMOD

Guiding: QHY5 + Baader UV/IR Cut + PHD

Capture: Nebulocity 3

Light Frames:

L: 40x600sec Bin1x1

RGB: 12x600sec Bin2x2

Total: 9.5h

Calibration Frames:

20x[Darks,Flats,Dark Flats,Bias] per channel

Description:

The Ghost Nebula, also Sh2-136 and VDB 141, is a reflection nebula at the edge of the Cepheus Flare molecular cloud complex in the constellation Cepheus.It is around 2 light years across.

The Iris Nebula, also NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula.

In Greek mythology, Iris is the personification of the rainbow and messenger of the gods. She is also known as one of the goddesses of the sea and the sky. Iris links the gods to humanity. She travels with the speed of wind from one end of the world to the other, and into the depths of the sea and the underworld.Iris is represented either as a rainbow, or as a young maiden with wings on her shoulders.