obrazell
October 20th, 2019, 08:21 AM
Arp 223
NGC 7585
Galaxy
Aquarius
R.A.: 23h18m01.2s
Dec.: -04°39'01" (2000)
Magnitude: 12.40 B
Size: 2.6'x 2.0'
In some ways I am surprised this object has not made it to the OOTW already given the focus on interacting galaxies.
This nice pair of galaxies NGC 7585 and 7576 in Aquarius was first discovered by William Herschel. He found NGC 7585
in September 1784 and NGC 7576 a year later in October 1785. The Arp designation only applies to NGC 7585 where
he included it in his class of galaxies with amorphous spiral arms. The galaxy is classified as a lenticular but deep images
suggest to me that it shows shells of material suggestive of a collision with another galaxy, although there is no obvious
candidate for this so must have been a long time ago and the colliding galaxy must been completely absorbed. NGC 7585
is classified as S0-a. NGC 7576 is also interesting is it appears to be a ring galaxy although the pair are not suggested to
have interacted despite lying at a similar distance of 151 million light years as there are no tidal features associated with
either galaxy. NGC 7576 is also classified as a lenticular but with a ring (SA0 +r). Using the near Infra-Red NIC camera on
Hubble appears to a show a strong bar in NGC 7585. For those looking for something more challenging there is the faint
galaxy NGC 7592 a short distance away, although this is also a William Herschel discovery in the same sweep he found
NGC 7585 so it cannot be that faint. There is also a quasar listed as 2315-049, also known as VCV 2001 or NGC 7585 UB1
with a redshift of 1.4, listed on Megastar about 1.4’ SE of the NGC 7585. It has a listed magnitude of18.7 but maybe fainter.
This may be a target for some of the larger scopes on this forum. None of these objects is exciting enough to make any of
the AL’s Herschel 400 lists.
3667
And as always,
give it a go and let us know!
NGC 7585
Galaxy
Aquarius
R.A.: 23h18m01.2s
Dec.: -04°39'01" (2000)
Magnitude: 12.40 B
Size: 2.6'x 2.0'
In some ways I am surprised this object has not made it to the OOTW already given the focus on interacting galaxies.
This nice pair of galaxies NGC 7585 and 7576 in Aquarius was first discovered by William Herschel. He found NGC 7585
in September 1784 and NGC 7576 a year later in October 1785. The Arp designation only applies to NGC 7585 where
he included it in his class of galaxies with amorphous spiral arms. The galaxy is classified as a lenticular but deep images
suggest to me that it shows shells of material suggestive of a collision with another galaxy, although there is no obvious
candidate for this so must have been a long time ago and the colliding galaxy must been completely absorbed. NGC 7585
is classified as S0-a. NGC 7576 is also interesting is it appears to be a ring galaxy although the pair are not suggested to
have interacted despite lying at a similar distance of 151 million light years as there are no tidal features associated with
either galaxy. NGC 7576 is also classified as a lenticular but with a ring (SA0 +r). Using the near Infra-Red NIC camera on
Hubble appears to a show a strong bar in NGC 7585. For those looking for something more challenging there is the faint
galaxy NGC 7592 a short distance away, although this is also a William Herschel discovery in the same sweep he found
NGC 7585 so it cannot be that faint. There is also a quasar listed as 2315-049, also known as VCV 2001 or NGC 7585 UB1
with a redshift of 1.4, listed on Megastar about 1.4’ SE of the NGC 7585. It has a listed magnitude of18.7 but maybe fainter.
This may be a target for some of the larger scopes on this forum. None of these objects is exciting enough to make any of
the AL’s Herschel 400 lists.
3667
And as always,
give it a go and let us know!