| ACQUISITION | PARAMETRES ACQUISITION | |||||
| Objet | Filtres | Bin | Temps Pose | Nombres Poses | Temps Total | |
| Nom | Sh2 274 | Luminance | 1 x 1 | |||
| Constellation | Gémeaux | Rouge | 1 x 1 | 300” | 45 | 3H75 |
| Distance | 1500 al | Vert | 1 x 1 | 300” | 44 | 3H75 |
| Détail prise de vue | Bleu | 1 x 1 | 300” | 45 | 3H75 | |
| Lieu | Portugal Sud | S2 | 1 x 1 | 600” | 79 | 13H16 |
| Date acquisition | 12/01/23 au 19/03/23 | Hα | 1 x 1 | 600” | 207 | 34h5 |
| Setup | O3 | 1 x 1 | 600” | 82 | 13H66 | |
| Instrument | Astrosib 400 | Totaux | 502 | 72H56 | ||
| Diamètre | 400 mm | Bias | 1X1 | 99 | ||
| Focale | 3200 mm | Dark | 1X1 | 51 | ||
| Rapport F/D | 8 | Flat | 1X1 | 11 | ||
| Monture | ASA DDM 85 | Acquisition faite par | Team ARO | |||
| Caméra acquisition | Moravian C4 36×36 | Traitement fait par | Team ARO | |||
| Caméra de guidage | Atik 314 L | Logiciels utilisés | ||||
| Montage de guidage | DO Skymeca | Acquisition | TheSkyX , Focusmax, Maxpilote | |||
| Echantillonage | 0,58 arcs | Traitement | Pixinsight, Photoshop | |||
COMMENTS ON THE PHOTO:
The Medusa Nebula, also known as Abell 21 and Sharpless 274, is a large planetary nebula located in the constellation Gemini, near the border with the constellation Little Dog. It was discovered in 1955 by George Abell. It is named after the luminous filaments of gas, reminiscent of Medusa’s ‘hair’ from Greek mythology.
The nebula was thought to be a supernova aftermath until the early 1970s. In 1971, Soviet astronomers determined that it is actually a planetary nebula.
ASCENSION DROITE: 07h29’02,69s
DÉCLINAISON: 13°14′ 48,4”