FaintFuzzies
April 30th, 2019, 06:50 AM
Object of the Week - Arp 105 – NGC 3561B and 3561A
RA: 11 11 13.3 Dec: +28 41 46
Size: 0.7 x 0.7’ Mag: 14.7
Decided to go for one of my old favorites. This complex has a lot of fun stuff to see, depending on your scope.
For 16” or smaller telescopes, you can probably see both components of NGC 3561A and B (labeled as A and B).
If you have a 20-30”, you can start picking off some galaxies in the field.
Now, if you have access to a 40” or larger scope, give the knot, bridge and plume a shot!
However, this is one of the AINTNO #22 objects from Barbara Wilson’s list. See https://www.astronomy-mall.com/Adventures.In.Deep.Space/aintno.htm . One note: We are not sure if the “knot” noted by Barbara is the “plume” to the north or the “knot” to the south.
Jimi and I had a lot of fun observing this object and some really dim stuff. Below are some notes of this object
48” (488 and 813x) - Ambartsumian's knot (labeled as “knot”) was detected as a “stellaring” within a very small glow just off the southern edge of NGC 3561B. The “plume” north of NGC 3561A was detected fairly easily about 3’ north. It appeared as an irregular knotted glow with a very faint, but obvious “bridge” connecting it to the north edge of NGC 3561A. MAC 1111+2843A, a knot just off the NE edge of NGC 3561A was a very faint 2:1 elongated glow pointed away from the center. MCG+5-27-12 was a considerably bright 3:2 elongated glow located 1.5’ SE of NGC 3561B. MAC 1111+2840 was a faint 2:1 elongated patch located 45” SE of MCG+5-27-12. MCG+5-27-15 (located 2.8’ NE of NGC 3561A) was a bright round glow with defined edges. MAC 1111+2844 was an extremely faint round glow and lies just east of the bridge. Another extremely faint glow (unlabeled galaxy) was detected on the other side of the bridge.
I could not believe that the bridge and plume was “blazing” in Jimi’s scope!
3522
So Give it a go and let us know!
RA: 11 11 13.3 Dec: +28 41 46
Size: 0.7 x 0.7’ Mag: 14.7
Decided to go for one of my old favorites. This complex has a lot of fun stuff to see, depending on your scope.
For 16” or smaller telescopes, you can probably see both components of NGC 3561A and B (labeled as A and B).
If you have a 20-30”, you can start picking off some galaxies in the field.
Now, if you have access to a 40” or larger scope, give the knot, bridge and plume a shot!
However, this is one of the AINTNO #22 objects from Barbara Wilson’s list. See https://www.astronomy-mall.com/Adventures.In.Deep.Space/aintno.htm . One note: We are not sure if the “knot” noted by Barbara is the “plume” to the north or the “knot” to the south.
Jimi and I had a lot of fun observing this object and some really dim stuff. Below are some notes of this object
48” (488 and 813x) - Ambartsumian's knot (labeled as “knot”) was detected as a “stellaring” within a very small glow just off the southern edge of NGC 3561B. The “plume” north of NGC 3561A was detected fairly easily about 3’ north. It appeared as an irregular knotted glow with a very faint, but obvious “bridge” connecting it to the north edge of NGC 3561A. MAC 1111+2843A, a knot just off the NE edge of NGC 3561A was a very faint 2:1 elongated glow pointed away from the center. MCG+5-27-12 was a considerably bright 3:2 elongated glow located 1.5’ SE of NGC 3561B. MAC 1111+2840 was a faint 2:1 elongated patch located 45” SE of MCG+5-27-12. MCG+5-27-15 (located 2.8’ NE of NGC 3561A) was a bright round glow with defined edges. MAC 1111+2844 was an extremely faint round glow and lies just east of the bridge. Another extremely faint glow (unlabeled galaxy) was detected on the other side of the bridge.
I could not believe that the bridge and plume was “blazing” in Jimi’s scope!
3522
So Give it a go and let us know!