TCP J23580961+5502508
Large outburst amplitude of 8.7 mag. Possible WZ Sge-type dwarf nova.
TCP J23580961+5502508 2022 09 30.4363* 23 58 09.61 +55 02 50.8 12.0 U Cas 9 0 http://www.cbat.eps.harvard.edu/unconf/followups/J23580961+5502508.html
2022 09 30.436 Discovered by Tadashi Kojima, Tsumagoi,Gunma-ken, Japan, on three frames(5_s exp) under limiting mag.= 13.5 taken by Canon EOS 6D digital camera + 135mm f/3.5 lens. Nothing is visible at this location taken on 2022 Sep29.601 UT under limiting mag.= 14.2, Mag=13.5 taken by Canon EOS 6D digital camera +200mm f3.2lens.
2022 09 30.549 Mag.= 12.0, position end figures 09s.58, 50".3 observed by T. Noguchi, Katori, Japan, using 0.23-m f/10 Schmidt-Cassegrain + unfiltered CCD (KAF-0261E), An image at http://park8.wakwak.com/~ngc/images/TCPinCas_20220930.jpg.
2022 09 30.4435 Yuji Nakamura, Kameyama, Mie, Japan, found this TCP on two frames (6 sec exp. limiting mag 13.5) taken by 135mm/F4.0 lens and CMOS camera. Mag.= 12.2, position end figures 09s.54, 49".9. Nothing is visible at this location on the frames taken on 2022 Sep. 26.4587 UT (6 sec exp. limiting mag 13.5) by same instrument. --- Isao Endoh (NAOJ)
IDs: 235809.604 +550250.329 Gaia_DR2_1993876650919517440 Plx=-1.3305(1.2667) dismod=-- pmRA=-6.965(2.818) pmDE=-26.213(1.222) G=20.6889(0.0112) BP-RP=0.5106 E(g-r)=-- E(B-V)=-- Ag=-- Ar=-- Ai=-- 235809.629 +550250.684 Gaia_EDR3_1993876650919517440 Plx=2.4918(0.8465) dismod=8.0 PM=26.721 pmRA=-13.58(1.081) pmDE=-23.013(0.697) G=20.611666(0.008471) BP-RP=0.426098 E(g-r)=0.110 E(B-V)=0.097 Ag=0.387 Ar=0.288 Ai=0.217 235809.572 +550248.802 PS1_DR1_174053595400396965 g=--(--) r=--(--) i=--(--) z=20.6374(0.0806) y=--(--) 235809.610 +550250.321 PS1_DR1_174053595401147507 g=20.7349(0.0215) r=20.7017(0.0399) i=20.7022(0.0305) z=20.6861(0.0456) y=--(--)
ASAS-SN Sky Patrol: https://asas-sn.osu.edu/sky-patrol/coordinate/2cea05a1-2534-4aae-9a9e-6cc267...
MPChecker: NO DATA
YYYYMMDD(UT) mag code 20220926.4587 <13.5C (Yuji Nakamura) 20220927.609 20.539cy ATF 20220928.343 <17.329g ASN 20220928.344 <17.398g ASN 20220928.346 <17.327g ASN 20220929.430 19.115o ATF 20220929.434 19.325o ATF 20220929.439 19.241o ATF 20220929.601 <14.2C (Tadashi Kojima) 20220930.436 12.0C (Tadashi Kojima) 20220930.4435 12.2C (Yuji Nakamura) 20220930.549 12.0C (Toshihide Noguchi)