Dear friends, Using my private system scraping MARS ( https://mars.lco.global ), I've just found ZTF21aceijig out as a CV candidate from the public ZTF data. It's amplitude is > ~ 6.0 mag (assuming the limiting mag of PS1-g is 21.6). (I'm sorry if someone has already discovered and reported it elsewhere.) Lasair: https://lasair.roe.ac.uk/object/ZTF21aceijig ALeRCE: https://lasair.roe.ac.uk/object/ZTF21aceijig MARS: https://mars.lco.global/?objectId=ZTF21aceijig According to ALeRCE, the position is (RA, Dec) = (01:49:59.397, +54:39:27.24) Last non-detections by ZTF: g > 19.6426 on 2021-09-23.40 (ZTF, 'difference mag' via ALeRCE) r > 19.9288 on 2021-09-23.44 (ZTF, 'difference mag' via ALeRCE) Last non-detection by ASAS-SN: g > 17.124 on 2021-09-27.5628629 First detections by ZTF: g = 15.694 +/- 0.036 on 2021-09-28.33 (ZTF, 'difference mag' via ALeRCE) r = 15.865 +/- 0.032 on 2021-09-28.41 (ZTF, 'difference mag' via ALeRCE) The result of ASAS-SN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/2f155ab7-61ac-4b06-9fb7-68d40f... There are no possible counterparts recorded in the PS1 mean object catalog. No known minor planets are found by the Minor Planet Checker ( https://www.minorplanetcenter.net/cgi-bin/checkmp.cgi ). Best Regards and Clear Skies, Kenta -- ________________________________________________________________  田口 健太　(TAGUCHI, Kenta)  京都大学大学院理学研究科宇宙物理学教室  (Department of Astronomy, Graduate School of Science, Kyoto University) kentagch@kusastro.kyoto-u.ac.jp <mailto:kentagch@kusastro.kyoto-u.ac.jp>  09090536980