TCP J20002413+1959394: possible WZ Sge-type dwarf nova Large amplitude outburst of 7 mag. Possible WZ Sge-type dwarf nova. TCP J20002413+1959394 2023 02 20.8278* 20 00 24.13 +19 59 39.4 12.9 U Sge 9 0 http://www.cbat.eps.harvard.edu/unconf/followups/J20002413+1959394.html 2023 02 20.82785 Discovered by Hideo Nishimura, Kakegawa, Shizuoka, Japan on three frames (30-s exp. limiting mag 15) taken by Canon EOS 6D digital camera + 200-mm F/3.2 lens. On 2023 Feb. 19.81791 UT, mag=12.8 (limiting mag 15), 21.82700 UT, mag=13. Nothing is visible at this location on the frames taken on 2023 Feb. 17.83795 UT (limiting mag 15) by same instrument. --- Seiichiro Naito and Isao Endoh (NAOJ) IDs: 200024.105 +195939.939 Gaia_DR2_1823298696167827200 Plx=2.3425(0.9314) dismod=8.2 pmRA=-2.23(1.102) pmDE=-0.2(1.188) G=20.5707(0.0095) BP-RP=0.3392 E(g-r)=0.032 E(B-V)=0.028 Ag=0.113 Ar=0.084 Ai=0.063 200024.106 +195939.925 Gaia_EDR3_1823298696167827200 Plx=2.2632(0.7637) dismod=8.2 PM=1.398 pmRA=-1.07(0.729) pmDE=0.9(0.727) G=20.50371(0.008507) BP-RP=0.592648 E(g-r)=0.038 E(B-V)=0.034 Ag=0.134 Ar=0.100 Ai=0.075 200024.106 +195939.951 PS1_DR1_131993001004563865 g=20.9059(0.0725) r=20.6909(0.0366) i=20.6181(0.0451) z=20.1438(0.0897) y=19.9086(0.1157) 200024.103 +195940.056 PS1_DR2_131993001004563865 g=20.8611(0.017786) r=20.6897(0.016649) i=20.5832(0.022164) z=20.1729(0.033345) y=19.8057(0.052282) 200024.103 +195940.056 PS1_DR2_131993001004563865 g=20.8637(0.017634) r=20.6718(0.016989) i=20.564(0.022398) z=20.1733(0.034204) y=19.7821(0.051221) 200024.103 +195940.056 PS1_DR2_131993001004563865 g=20.872(0.017211) r=20.6751(0.016226) i=20.5458(0.0215) z=20.2063(0.034408) y=19.811(0.052392) ASAS-SN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/7badee06-5665-437e-9451-b5db49... ZTF alerts: https://alerce.online/object/ZTF23aacteoa MPChecker: NO DATA TCPJ20002413+1959394 20230217.83795 <150C (Hideo Nishimura) TCPJ20002413+1959394 20230219.555 14.037zr ZAD TCPJ20002413+1959394 20230219.555 14.038zr ZAL TCPJ20002413+1959394 20230219.81791 12.8C (Hideo Nishimura) TCPJ20002413+1959394 20230220.8278 12.9C (Hideo Nishimura) TCPJ20002413+1959394 20230221.553 13.905zr ZAL TCPJ20002413+1959394 20230221.553 14.211zr ZAD TCPJ20002413+1959394 20230221.555 13.918zr ZAL TCPJ20002413+1959394 20230221.555 14.290zr ZAD TCPJ20002413+1959394 20230221.558 13.864zr ZAL TCPJ20002413+1959394 20230221.558 14.237zr ZAD TCPJ20002413+1959394 20230221.560 13.860zr ZAL TCPJ20002413+1959394 20230221.560 13.995zr ZAD TCPJ20002413+1959394 20230221.82700 13.0C (Hideo Nishimura)