BD+40°4124

Constellation: Cygnus

DB+40°4124 is a young Herbig Ae/Be star in the constellation of Cygnus. This massive pre-main-sequence star is deeply embedded in an active star-forming region alongside other massive young objects like V1318 Cyg and V1686 Cyg. Both are Hebig Ae/Be stars. Its distance from Earth is about 3200 Ly. It is believed that the stellar cluster surrounding BD+40°4124 was triggered into existence by a massive collision of giant molecular clouds [1]. Both V1686 [2] and V1318 (South) [3] have outbursts (both are eruptive young stars) that are visible on the emission line images below. The open cluster to the NE is Collinder 421. Link to interactive sky chart.

1. Looney LW et al., Colliding Clouds: The Star Formation Trigger of the Stellar Cluster around BD +40 4124. AJ, 642:330-338, 2006 (link)
2. Andreasyan H et al., Simultaneous photometric and spectral analysis of a new outburst of V1686 Cyg. RAA, 20:53, 2020 (link)
3. Magakian TY et al., New powerful outburst of the unusual young star V1318 Cygni S (LkHα 225). A&A, 625:A13, 2019 (link)

Telescope & Mount:

656 14″ Corrected Newtonian on a ASA DDM100 mount.

Imaging:

Camera: PlayerOne Zeus Mono (bin 1×1)

Data:
Hα: 104x300s
[O III]: 119x300s
[S II]: 110x300s

Total integration time: 27h 45′

Legend for image on the left:
Stars:
Black: DB+40 4124
Orange: V1686 Cyg
Red: V1318 Cyg (South)
Arrows:
Blue: V1318 Cyg outburst
Green: V1686 Cyg outburst

Left:
[O III] image