Deep Sky Object in Summer
Sh2-75 & Sh2-76 (Diffused Nebulae in Aquila)

Click on image to enlarge

Date & Time: Mar 22 2023, from 26:42 to 27:38 JST(+0900)
Composed 8 shots with 8 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with IDAS LPS-D1 Light-pollution suppression filter
Auto-guided with TAKAHASHI JP Equatorial+SBIG STV
CMOS Camera: ZWO ASI2600MC Pro (Cooled temp.: -20°C)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...16bit FITS, converted to 16bit TIFF(6248×4176)
Device Size...23.5×15.7mm, Gain...100


Sh2-75 / Diffused Nebula, type E
R.A.18h 59m 15.3s (2000.0)
Dec.+07°07' 12" (2000.0)
Apparent Size10.0'
Real Size6.4 light yrs.
Magnitude -
Distance2200 light yrs.
Other IDs -
Sh2-60 / Diffused Nebula, type 4 E
R.A.18h 56m 25.6s (2000.0)
Dec.+07°48' 48" (2000.0)
Apparent Size8.0×5.0''
Real Size13 light yrs.
Magnitude -
Distance5600 light yrs.
Other IDsLBN 110
Sh2-75 and Sh2-76 are extremely faint Hα emission nebulae located near the border to Serpens Cauda in the western part of Aquila. They can be found approximately 13 degrees due west of Altair. The red nebula with a visual diameter of about 10 arc minutes in the lower left of the image is Sh2-75, and the slightly denser red nebula one degree northwest of it is Sh2-76. Although there seems to be an extremely faint molecular cloud distributed between the two nebulae, there is no specific designation for it. Although there is a nearly three-fold difference in distance between the two nebulae, there are reports of some correlation between them.



Sh2-73
Sh2-78

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