Observation by Paul Leyland: 2MFGC 2808: a galaxy in the field of SV ...
Uploaded by
Dr Paul Leyland
Observer
Paul Leyland
Observed
2019 Nov 30 - 01:28
Uploaded
2019 Dec 05 - 14:10
Equipment
- 0.4m Dilworth-Relay
- SX Trius Pro 814
- Johnson-V filter
Exposure
1210 s (43 subs, average-stacked)
Location
Tacande Observatory, MPC J22
Target name
2MFGC 2808
Title
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.
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Comments
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.
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