Getting plate-solving status, please wait...
Sh2 172 173 177 (Star formation area including the Phantom), 



    
        

            jerryyyyy
Sh2 172 173 177 (Star formation area including the Phantom), 



    
        

            jerryyyyy

Sh2 172 173 177 (Star formation area including the Phantom)

Getting plate-solving status, please wait...
Sh2 172 173 177 (Star formation area including the Phantom), 



    
        

            jerryyyyy
Sh2 172 173 177 (Star formation area including the Phantom), 



    
        

            jerryyyyy

Sh2 172 173 177 (Star formation area including the Phantom)

Acquisition details

Dates:
Oct. 27, 2022
Frames:
Antlia Blue: 12×45(9′)
Antlia Green: 12×45(9′) ISO0
Antlia Red: 12×45(9′)
Chroma H-alpha 5nm Bandpass 2": 17×450(2h 7′ 30″)
Integration:
2h 34′ 30″
Avg. Moon age:
2.19 days
Avg. Moon phase:
5.31%

Basic astrometry details

Astrometry.net job: 6472242

Resolution: 9406x6290

File size: 44.9 MB

Locations: Stanford Faculty Observatory (Bortle 6 SQM 18.6), Stanford, California, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility

Description

Another set of three Sharpless2 objects that is seen in the context of the surrounding H-alpha clouds thanks to the CMOS chip and stretching optimized with GHS.  Contains the notorious Phantom of the Opera... see the Galaxy Map discussion (below) of this as a star formation area.

Note:  172 is the bright dot upper left; 173 is the Phantom; 177 is the lower right. 

GHS Forum Discussion

The Phantom in a prior CCD version (same scope):


Sh2 173 Phantom of the Opera (and little 172)


From GalaxyMap:

Russeil combines Sh 2-172, Sh 2-173 and Sh 2-177 into one star formation region. All three nebulae lie in the direction of the expanding shell of gas and dust surrounding the Cas OB5 association.

Russeil identifies 7 possible ionising stars for Sh 2-173, the hottest of which is the O9 V star ALS 6151 (BD +60 39).

Avedisova associates Sh 2-173 with the star cluster NGC 103, the radio source KR 98, and the dark nebula LDN 1282.

Sh 2-173 appears to be on the edge of the HI shell GSH 117.8+1.5-35 associated with Cas OB5.

GENERAL NOTE ON SHARPLESS2 OBJECTS>>>>>>>>>>>>>

There are 313 Sh2 objects.  All now imaged.

This is my collection:

Sharpless2

Wide-Angle Hydrogen Alpha Nikon Image Sh2 79-171

Please note there is also a Sharpless2 Group with now more than 2700 examples.

Sharpless2 Group

Other useful links include:

Gary Imm's Collection

GalaxyMap's Collection

The Sharpless Catalog

The MDW H-alpha Sky Survey

Reiner Vogel's detailed observing catalog

Hope you enjoy these obscure but interesting objects...

Comments