Barnard 33

ObjetFiltresBinTemps PoseNombres PosesTemps Total
NomBarnard 33Luminance1 x 1
ConstellationOrionRouge G75 O151 x 1150”733.2 H
Distance1500 AlVert G75 O151 x 1120”923.4 H
Détail prise de vueBleu G75 O151 x 1120 ”943.6 H
LieuAmeiria Portugal
S2 G200 O601 x 1
Date acquisition30/12/20 au 15/03/21Hα G200 O601 x 1180”20110.3 H
SetupO3 G200 O601 X 1
InstrumentTakahashi FSQ 106 EDTotaux45919H15
Diamètre106 mmBias1 X 199
Focale530 mmDark1 X 151
Rapport F/D5Flat1 X 111
MontureSkywatcher AZ EQ6 Pierro AstroAcquisition faite parTeam ARO
Caméra acquisitionASI 1600 MM CooledTraitement fait parTeam ARO
Caméra de guidageStarlight-X Press Lodestar X2Logiciels utilisés
Montage de guidageDO Starlight X pressAcquisitionTheSkyX , Focusmax, Maxpilote
Echantillonage1,48 arc/sTraitementPixinsight, Photoshop


This image of Barnard 33, is our third shot, on our Portuguese site. We prefer to have a large number of hours of acquisition, in order to obtain a high quality image, rather than a large number of objects.

This is still the case for this photo, which is very rich in signal, due to the exceptional quality of the site.

We take great pleasure in processing these photos, where we have exploited all the signal that our camera has captured.


One of the most recognisable nebulae in the sky, the Orion Horsehead Nebula, is part of a large, dark molecular cloud. Also known as Barnard 33, the unusual shape was first discovered on a photographic plate in the late 1800s. The red glow comes from the hydrogen gas mainly behind the nebula, ionised by the nearby bright star Sigma Orionis .

Slightly below, to the left of the horse’s head, is the blue reflection nebula NGC 2023. The darkness of the Horsehead is mainly caused by thick dust. The gas streams leaving the nebula are channelled by a strong magnetic field. Light takes about 1500 years to reach us from the Horsehead Nebula.

Below Ngc 2023 we find the tiny reflection nebula Ic 435.

Further to the left is the Flame Nebula, which extends over about 12 light years. The nebula is energised by Alnitak (Zeta Orionis), the easternmost bright star in Orion’s belt. The intense ultraviolet radiation from this blue supergiant ionises the hydrogen atoms in the nebula. The ions thus created emit a red glow when they capture a free electron.
Gas and especially dust in front of NGC 2024 absorb the light from the nebula and form the dark ribbon seen in the visible light images.

To the left of the Flame Nebula we find Ic 432 and Ic 431, two reflection nebulae.

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DÉCLINAISON:-02°27′ 30s