British Astronomical Association
Supporting amateur astronomers since 1890

BAA Images Paul Leyland

Observation by Paul Leyland: 2MFGC 2808: a galaxy in the field of SV ...

Uploaded by

Paul Leyland


Paul Leyland


2019 Nov 30 - 01:28


2019 Dec 05 - 14:10

  • 0.4m Dilworth-Relay
  • SX Trius Pro 814
  • Johnson-V filter

1210 s (43 subs, average-stacked)


Tacande Observatory, MPC J22

Target name

2MFGC 2808


2MFGC 2808: a galaxy in the field of SV Ari

About this image

I've often noticed a background galaxy in the field of SV Ari but never paid it much attention.  A week or so ago the VS was too faint to be detected --- below 19.9 in V.  This time, though, I looked at the galaxy properly.  As can be seen, it's a nice edge-on spiral with a prominent equatorial dust band and a nuclear bulge.  Not much has been found about it on the web, other than its position, catalogue number and near-IR magnitudes.  A fairly poor image appears in the DSS2 and shows the galaxy to be rather red.  I used  APT with a 23x6 arcsec aperture to measure its integrated brightness at V=16.46 +/- 0.05.  The catalogued magnitudes are J=12.947, H=12.060 and K=11.690, in line with its apparent redness.

The red shift seems not to have been measured.  It may be a little too faint for the spectroscopists here but it would be a worthy challenge in my opinion.  At least it is high in the sky for a good number of hours each night for UK observers.  Assuming it is about the same size as M31, M51 and the MW, which have absolute magnitudes of -21.5, -21.1 and -20.9 respectively, its distance modulus becomes around 37.5 which suggests a distance of around 300 Mpc.  Assuming my arithmetic is correct, z should be around 0.09.

Files associated with this observation
Like this image
Paul Leyland
Paul Leyland, 2019 Dec 18 - 10:37 UTC

The subs were averaged-stacked to preserve photometric accuracy.  Median stacking would have removed the hot pixels and the cosmic ray hit south-west of comparison 165 but I wasn't interested in making a pretty picture at the time.

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of work by third parties is expressly forbidden without the consent of the copyright holder. By submitting images to this online gallery, you grant the BAA permission to reproduce them in any of our publications.