› Forums › Variable Stars › IX Dra: observations requested › Spectroscopy and magnitude
7 January 2021 at 1:37 pm
#583667
![](https://britastro.org/wp-content/uploads/2020/08/picture-10338-1596391155-80x80.jpg)
Participant
Robin , How bright does a star need to be to obtain a decent S/N ratio spectrum?
IX Dra is a bit faint perhaps, but ER Uma is brighter (V mag 13 maximum and better placed for observations ) and also approaching a superoutburst. See Discussion Forum on ER Uma and RZ Lmi.
Stewart