› Forums › Variable Stars › Something interesting by M88 › AL com
6 May 2019 at 8:58 pm
#581039
![](https://britastro.org/wp-content/uploads/2020/08/picture-10338-1596391155-80x80.jpg)
Participant
Repeating this field on May 5th ( following my first observation on 28 April), Al Com is only just detectable with itelescope’s T14 106 mm refractor with a V filter. AstroImageJ gives an magnitude estimate of 15.0 but the S/N and S/B are poor and the reference star is magnitude 11.9 – perhaps too bright to be the best choice.
However, using a Luminance filter it is still easily visible.