I used standard VPhot procedure and got brightness of ZTF J225339.32+585101.2 (it is placed near V730 Cep) 14.55TG. The star magnitude by VSX is about 18.3r, ZTF data shows the same values.
#NAME,DATE,MAG,MERR,FILT,TRANS,MTYPE,CNAME,CMAG,KNAME,KMAG,AMASS,GROUP,CHART,NOTES
WISE J225308.9+585331,2460516.44225,14.778,0.058,TG,NO,STD,ENSEMBLE,na,137,13.736,1.0497,na,X37285AEY,75x8s|KDEC=58.8926944444444|KMAGINS=-4.264|KMAGSTD=13.736|KRA=343.4835|KREFERR=0.032|KREFMAG=13.749|VMAGINS=-3.222
V0730 Cep,2460516.44225,14.929,0.059,TG,NO,STD,ENSEMBLE,na,137,13.736,1.0497,na,X37285AEY,75x8s|KDEC=58.8926944444444|KMAGINS=-4.264|KMAGSTD=13.736|KRA=343.4835|KREFERR=0.032|KREFMAG=13.749|VMAGINS=-3.071
#ZTF J225339.32+585101.2,2460516.44225,14.551,0.057,TG,NO,STD,ENSEMBLE,na,137,13.736,1.0497,na,X37285AEY,75x8s|KDEC=58.8926944444444|KMAGINS=-4.264|KMAGSTD=13.736|KRA=343.4835|KREFERR=0.032|KREFMAG=13.749|VMAGINS=-3.448
The star is really bright, if VPhot identification is correct. I tried to share VPhot image to Sebastian, but sharing does not work.
I do not know how important is the info, but I have to inform.
Sorry, ZTF J225339.32+585101.2 is faint star near brightr other one - SIMBAD image shows it clear.
You requested an AUID and I assigned it trusting you were able to observe it.
Can you get good photometry of it? If not, just ignore it.
Thanks,
Sebastian