SUNSET: 
0
Photographer:
massimo.difusco
Location of Photo:
Italy
Date/Time of photo:
30/11/2024 00:00
Equipment:
Konus 200/1000 and Sky-Watcher 200/1000, Player One Poseidon-C and ToupTek 571c, Sky-Watcher Eq6r Pro mount, Optolong L_Ultimate and L-QEF and SvBony SV220 filters
Description:
The objects imaged are located in the constellation Cassiopeia, just above the Heart Nebula, and are cataloged with the acronyms Abell 6 (in the center) and HFG1 (further to the right and lower). HFG1 (Heckathorn-Fesen-Gull 1) and Abell 6 make for an interesting pair of planetary nebulae (PN). Abell 6 has the bubble look of most PNs and it remains quite faint (Mag = 15). It has a blue look from ionization of OIII and has also a fairly strong Ha component as well. Discovered in 1982, HFG1 (PK 136+05) has a more complex structure: it presents an arc of a circle opposite the tail, in the direction of movement of the nebula, which suggests that it is a shock wave front of matter interacting with the interstellar medium.
