› Forums › Spectroscopy › PSN at2017gjn in NGC1067 confirmed using ALPY 200 › distance to ngc4964
![](https://britastro.org/wp-content/uploads/2016/11/picture-146-1478110706-80x80.jpg)
Nice image David. Photometry could be useful. Do you plan to submit it to David Bishop’s website? there are no measurements or images for this SNe there yet.
http://www.rochesterastronomy.org/snimages/
Only clouds and bands of rain on this side of the country tonight unfortunately.
I suspect it is close to maximum now and since it is a type 1a I had a go at estimating how bright it should get to at maximum.
According to NED http://ned.ipac.caltech.edu there are no redshift independent distance measurements for ngc4964 but based on the redshift the distance would be ~36Mpc. (Though for a relatively nearby target like this the errors could be high)
Using 36Mpc and an absolute V mag of -19.3 at maximum for type 1a SNe gives an apparent V mag at maximum of ~13.5 (not taking into account any extinction) so your mag 14 guestimate seems reasonable.
Robin