ASASSN-18jh: deeply eclipsing SU UMa star currently in superoutburst, but almost ending
Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021) I obtained a period of 0.0783463(1) d. Eclipses were 1.3 mag deep in quiescence + orbital hump. ATLAS Intranight variations during the current long outburst suggest superhumps. A high inclination is suspected.
YYYYMMDD(UT) mag observer 20230129.1119 18.114o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230129.1150 18.108o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230129.1204 18.087o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230129.1302 18.188o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230130.1257 17.909o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230130.1284 17.905o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230130.1343 17.980o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230130.1453 17.700o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230130.8592 16.147o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230130.8625 16.206o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230130.8689 16.159o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230130.8787 16.176o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230131.1667 16.12C (Eddy Muyllaert) 20230131.8574 15.498o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230131.8606 15.430o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230131.8660 15.537o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230131.8773 15.756o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230202.1097 15.587o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230202.1128 15.595o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230202.1189 15.658o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230202.1289 15.762o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230203.0826 15.454o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230203.0951 16.216o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230203.0987 16.498o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230203.1063 15.491o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230203.8551 15.566o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230203.8587 15.597o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230203.8642 15.560o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230203.8770 15.685o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230204.8578 15.678o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230204.8615 15.757o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230204.8683 15.784o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230204.8820 15.868o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230206.0995 15.970o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230206.1028 15.985o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230206.1086 16.099o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230206.1187 16.084o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230207.0951 17.311o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230207.0988 16.387o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230207.1052 16.114o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230207.1172 15.824o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230207.8592 16.112o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230207.8625 16.120o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230207.8699 16.268o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230208.8294 16.347o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230208.8326 16.436o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230208.8400 16.564o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230208.8500 16.517o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.8397 16.955o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.8433 17.073o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.8487 17.087o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.8599 16.957o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230211.1383 170C (Masao Funada) 20230212.0855 17.473c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230212.0894 17.460c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230212.0952 17.599c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))