Deep Sky Object in Summer
Around Sh2-123 (Diffused Nebula in Cygnus)
Click on image to enlarge
| Date & Time: | Sep 21 2025, from 20:38 to 22:27 JST(+0900) |
| Mosaic of 2 flames of 8min.×6shots |
| Optical: | TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3) |
| with IDAS LPS-D1 light-pollution suppression filter |
| Auto-guided with TAKAHASHI EM-200 Equatorial+Lacerta M-GEN |
| CMOS Camera: | ZWO ASI2600MC Pro (Cooled temp.: -10°C) |
| Location: | Furudono town, Fukushima pref. |
| Camera Settings: | Recording format...16bit FITS, converted to 16bit TIFF(6248×4176) |
| Device Size...23.5×15.7mm, Gain...100 |
Objects around Sh2-123
|
This image captures faint Hα emission nebulae and dark nebulae in the eastern part of Cygnus, about 7.7 degrees east of the North America Nebula (NGC 7000).
The red emission nebula visible on the left, with an apparent diameter of 13 arcminutes, is Sh2-123. Located roughly 12,000 light-years away,
it lies on the eastern outskirts of the red nebula complex that extends across northern Cygnus.
A very faint Hα nebula, LBN 407, stretches north-south across the center of the frame, spanning about 2 degrees in length.
Between the southern end of LBN 407 and 75 Cygni lies a diffuse dark nebula. Several catalog IDs are assigned to it, the most prominent being B159, which spans approximately 25 arcminutes.
|
| Sh2-123 / Diffused Nebula, type 5 E |
|---|
| R.A. | 21h 42m 23.0s (2000.0) |
|---|
| Dec. | +44°28' 04" (2000.0) |
|---|
| Apparent Size | 13.0' |
|---|
| Real Size | 47 light yrs. |
|---|
| Magnitude | - |
|---|
| Distance | 12400 light yrs. |
|---|
| Other IDs | LBN 414 |
|---|
|
| LBN 407 / Diffused Nebula, type 6 E |
|---|
| R.A. | 21h 36m 00.0s (2000.0) |
|---|
| Dec. | +44°12' 00" (2000.0) |
|---|
| Apparent Size | 120×20' |
|---|
| Real Size | N/A |
|---|
| Magnitude | - |
|---|
| Distance | N/A |
|---|
|
| B159 / Dark Nebula, type 5 Ir |
|---|
| R.A. | 21h 38m 24.0s (2000.0) |
|---|
| Dec. | +43°14' 00" (2000.0) |
|---|
| Apparent Size | 25.0' |
|---|
| Real Size | N/A |
|---|
| Magnitude | - |
|---|
| Distance | N/A |
|---|
|
