What galaxy is this?

[StuartT]

Last night I was imaging the Beehive Cluster and I seem to have got a galaxy too. But I can't find it in any of my atlases.

Anyone know what it is?

 

[paul mc c]

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.thefreelibrary.com/Galaxies%2Bin%2Bthe%2BBeehive%3A%2Ba%2Bsmall%2Bswarm%2Bbuzzes%2Binside%2Bthe%2Bfamous%2Bstar...-a0441765788&ved=2ahUKEwj07Imu-J32AhWBY8AKHSOHARUQFnoECCQQAQ&usg=AOvVaw317SkbJgaRQ9cm0c9IS0Gp

Might get some help here. 

[mdstuart]

Ugc 4526 I think.

[mdstuart]

http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%401110060&Name=UGC 4526&submit=submit

 

[StuartT]

Bingo! That's it. Thanks.

(I don't know my way around the apps, but presumably there is a way to search databases by RA and Dec?)

[mdstuart]

You can just upload your image to https://nova.astrometry.net/ and it will label the objects for you..try it.

Mark

[StuartT]

21 minutes ago, mdstuart said:

You can just upload your image to https://nova.astrometry.net/ and it will label the objects for you..try it.

Mark

thanks. Uploaded it, but it's taking quite a while (about 15 min so far). Is that usual?

[mdstuart]

Yes I think so...Worth the wait.

I might have a look for it with my 20 inch dob tonight!

Mark

[StuartT]

Just now, mdstuart said:

Yes I think so...Worth the wait.

I might have a look for it with my 20 inch dob tonight!

Mark

I'm going to image this galaxy tonight. Though it will still be fairly small in my Esprit 150

[StuartT]

55 minutes ago, mdstuart said:

You can just upload your image to https://nova.astrometry.net/ and it will label the objects for you..try it.

Mark

Ok, it's solved it, but it hasn't identified the galaxy

[Captain Scarlet]

1 hour ago, StuartT said:

(I don't know my way around the apps, but presumably there is a way to search databases by RA and Dec?)

this shoud work? (on a computer rather than phone I think):

http://simbad.u-strasbg.fr/simbad/sim-fcoo

 

[mdstuart]

Oh well at least it solved the image?

Anyway nice image by the way. I am off outside to observe.

Mark

[StuartT]

well... this is what I got after over 3h of data. Not too impressive! But it's only 50 arcsec wide I guess.

Galaxies are hard!

[lukebl]

I'd highly recommend the free stacking and photometry software ASTAP.

Not only does it stack images really well and quickly, it will plate solve and label your image with details such as asteroids, comets, magnitudes, deep sky objects.

Here's your image with all the DSOs labelled. Yours is a lovely image!

[StuartT]

2 hours ago, lukebl said:

I'd highly recommend the free stacking and photometry software ASTAP.

Not only does it stack images really well and quickly, it will plate solve and label your image with details such as asteroids, comets, magnitudes, deep sky objects.

Here's your image with all the DSOs labelled. Yours is a lovely image!

Interesting. Thanks. 

I have ASTAP (it's my blind solver in NINA), but I've never tried stacking with it. I always use APP or Siril

[StuartT]

Can I just check my calculation of the distance of this galaxy?

I understand that the distance of a galaxy (which is outside the local group) is

d = cz/H

where d is the distance in Mpc; c is the speed of light in km/s; z is the redshift and H is the Hubble constant (70 km/s)

According to Simbad UGC4526 has a redshift of 0.0147 so I make the distance to be 0.063 Mpc (or about 205 million light years) 

[scotty38]

did you use 300 or 300,000 for the speed of light?

[Stu]

43 minutes ago, StuartT said:

Can I just check my calculation of the distance of this galaxy?

I understand that the distance of a galaxy (which is outside the local group) is

d = cz/H

where d is the distance in Mpc; c is the speed of light in km/s; z is the redshift and H is the Hubble constant (70 km/s)

According to Simbad UGC4526 has a redshift of 0.0147 so I make the distance to be 0.063 Mpc (or about 205 million light years) 

That seems consistent with SkySafari which has it at 207 million light years. Nice catch 👍

[StuartT]

1 hour ago, scotty38 said:

did you use 300 or 300,000 for the speed of light?

300 (to keep the units in km/s)

[Stu]

Just now, StuartT said:

300 (to keep the units in km/s)

The bit that confused me is that SkySafari says 63 Mpc but the calculation comes out at 0.063 Mpc and the distance in light years agrees. Not sure what’s happened there.

[scotty38]

18 minutes ago, StuartT said:

300 (to keep the units in km/s)

 

16 minutes ago, Stu said:

The bit that confused me is that SkySafari says 63 Mpc but the calculation comes out at 0.063 Mpc and the distance in light years agrees. Not sure what’s happened there.

300,000 should address both these things 🙂

[StuartT]

26 minutes ago, Stu said:

The bit that confused me is that SkySafari says 63 Mpc but the calculation comes out at 0.063 Mpc and the distance in light years agrees. Not sure what’s happened there.

apologies. I mistyped. I used the speed of light in km/s which is 300,000, not 300 as I said.