This nebula may be associated with the Scutum supershell in the Centaurus arm.
Avedisova places it in star formation region SFR 16.65-0.34
along with the molecular clouds SYCSW 164, SYCSW 164A and SRBY 52. She concludes that Sh 2-48 is ionised by the O8 V multiple star ADS 11285
The newly discovered dense star cluster Kronberger 25
appears in the same direction as Sh 2-48, although a tentative distance estimate for this cluster of about 2000 parsecs suggests that it may be a foreground object.
Describes Kronberger 25.[1
This region may be associated with the Scutum supershell.[2
1. ^ Kronberger, M., Teutsch, P., Alessi, B., et al. (2006). "New galactic open
cluster candidates from DSS and 2MASS imagery", Astronomy and Astrophysics,
Vol. 447, 921-928. [2006A&A...447..921K]
2. ^ Callaway, Matthew B., Savage, Blair D., Benjamin, Robert A., et al.
(2000). "Observational Evidence of Supershell Blowout in GS 018-04+44: The
Scutum Supershell", The Astrophysical Journal, Vol. 532, 943-969.