NGC 1052-DF2

[Sue French]

I almost sent this yesterday, but I'm visiting relatives and haven't had a chance to read the relevant papers. So, I have no idea whether Jimi could see this, but it shows in MegaStar. This gained recent famed as a supNGC 1052-DF2posedly dark-matterless galaxy.

2962

[Jimi Lowrey]

Hi Sue it is already on my list. What I am hopeing for is that I am going to be able to glimpse some of the many globs that are in the galaxy. The SDSS image shows many of them.

Link to paper about object. It has a great map of the GC's.

https://arxiv.org/pdf/1803.10237.pdf

[wvreeven]

Th paper states that the brightest goobular cluster (GC-73) has an absolute magnitude of -10.1 and with a distance of 20 Mpc that gives an apparent magnitude of about 21.4. Unless I make a mistake in my calculations of course. m = M - 5 + 5*log10(d) with d in pc.

[Jimi Lowrey]

Wow 21.4 ! It looks brighter. You can see G on the Poss II image. I am still going to try them it would not be the fist time I have been skunked if I don't see them. LOL

[Sue French]

The paper being submitted to Nature says:
The total magnitude of NGC1052–DF2 is V606 = −15.4, and the total luminosity is Lv = 1.1x10^8 Lsun

[wvreeven]

Indeed and that’s the absolute magnitude of the galaxy. So that should be easy to spot :P

[Uwe Glahn]

Gave it a try yesterday with the 27-inch under very good transparency (NELM 7m0+) of an Alpine observing place.

The galaxy was much easier to see than I expected. I could steadily hold the diffuse and somewhat concentrated glow with averted vision. It was visible already in the finder eyepiece (113x). Best views were around 293x.