I've found the following eclipse elements for AY Psc :- HJD 2447623.3463 P = 0.2173209 days Usually eclipse elements for CVs are fairly stable, except for the occasional UGSU object (eg HT Cas) where they can change between/at outbursts. So, are these elements still current? Below are mideclipse prediction times in GJD based on the above for comparison with any other tables that may be doing the rounds. John Greaves > Mideclipse Ephemeris for the UGZ Star AY PSC > > JD 2452619.3333 Tue 10.8333 (19h 60m GMT) Dec 2002 > JD 2452619.5506 Wed 11.0506 ( 1h 13m GMT) Dec 2002 > JD 2452619.7680 Wed 11.2680 ( 6h 26m GMT) Dec 2002 > JD 2452619.9853 Wed 11.4853 (11h 39m GMT) Dec 2002 > JD 2452620.2027 Wed 11.7027 (16h 52m GMT) Dec 2002 > JD 2452620.4200 Wed 11.9200 (22h 5m GMT) Dec 2002 > JD 2452620.6373 Thu 12.1373 ( 3h 18m GMT) Dec 2002 > JD 2452620.8547 Thu 12.3547 ( 8h 31m GMT) Dec 2002 > JD 2452621.0720 Thu 12.5720 (13h 44m GMT) Dec 2002 > JD 2452621.2894 Thu 12.7894 (18h 57m GMT) Dec 2002 > JD 2452621.5067 Fri 13.0067 ( 0h 10m GMT) Dec 2002 > JD 2452621.7240 Fri 13.2240 ( 5h 23m GMT) Dec 2002 > JD 2452621.9414 Fri 13.4414 (10h 36m GMT) Dec 2002 > JD 2452622.1587 Fri 13.6587 (15h 49m GMT) Dec 2002 > JD 2452622.3761 Fri 13.8761 (21h 2m GMT) Dec 2002 > JD 2452622.5934 Sat 14.0934 ( 2h 14m GMT) Dec 2002 > JD 2452622.8107 Sat 14.3107 ( 7h 27m GMT) Dec 2002 > JD 2452623.0281 Sat 14.5281 (12h 40m GMT) Dec 2002 > JD 2452623.2454 Sat 14.7454 (17h 53m GMT) Dec 2002 > JD 2452623.4628 Sat 14.9628 (23h 6m GMT) Dec 2002 > JD 2452623.6801 Sun 15.1801 ( 4h 19m GMT) Dec 2002 > JD 2452623.8974 Sun 15.3974 ( 9h 32m GMT) Dec 2002 > JD 2452624.1148 Sun 15.6148 (14h 45m GMT) Dec 2002 > JD 2452624.3321 Sun 15.8321 (19h 58m GMT) Dec 2002 > JD 2452624.5495 Mon 16.0495 ( 1h 11m GMT) Dec 2002 > JD 2452624.7668 Mon 16.2668 ( 6h 24m GMT) Dec 2002 > JD 2452624.9841 Mon 16.4841 (11h 37m GMT) Dec 2002 > JD 2452625.2015 Mon 16.7015 (16h 50m GMT) Dec 2002 > JD 2452625.4188 Mon 16.9188 (22h 3m GMT) Dec 2002 > JD 2452625.6362 Tue 17.1362 ( 3h 16m GMT) Dec 2002 > JD 2452625.8535 Tue 17.3535 ( 8h 29m GMT) Dec 2002 > JD 2452626.0708 Tue 17.5708 (13h 42m GMT) Dec 2002 > JD 2452626.2882 Tue 17.7882 (18h 55m GMT) Dec 2002 > JD 2452626.5055 Wed 18.0055 ( 0h 8m GMT) Dec 2002 > JD 2452626.7229 Wed 18.2229 ( 5h 21m GMT) Dec 2002 > JD 2452626.9402 Wed 18.4402 (10h 34m GMT) Dec 2002 > JD 2452627.1575 Wed 18.6575 (15h 47m GMT) Dec 2002 > JD 2452627.3749 Wed 18.8749 (20h 60m GMT) Dec 2002 > JD 2452627.5922 Thu 19.0922 ( 2h 13m GMT) Dec 2002 > JD 2452627.8096 Thu 19.3096 ( 7h 26m GMT) Dec 2002 > JD 2452628.0269 Thu 19.5269 (12h 39m GMT) Dec 2002 > JD 2452628.2443 Thu 19.7443 (17h 52m GMT) Dec 2002 > JD 2452628.4616 Thu 19.9616 (23h 5m GMT) Dec 2002 > JD 2452628.6789 Fri 20.1789 ( 4h 18m GMT) Dec 2002 > JD 2452628.8963 Fri 20.3963 ( 9h 31m GMT) Dec 2002 > JD 2452629.1136 Fri 20.6136 (14h 44m GMT) Dec 2002 > JD 2452629.3310 Fri 20.8310 (19h 57m GMT) Dec 2002 > JD 2452629.5483 Sat 21.0483 ( 1h 10m GMT) Dec 2002 > JD 2452629.7656 Sat 21.2656 ( 6h 23m GMT) Dec 2002 > JD 2452629.9830 Sat 21.4830 (11h 35m GMT) Dec 2002 > JD 2452630.2003 Sat 21.7003 (16h 48m GMT) Dec 2002 > JD 2452630.4177 Sat 21.9177 (22h 1m GMT) Dec 2002 > JD 2452630.6350 Sun 22.1350 ( 3h 14m GMT) Dec 2002 > JD 2452630.8523 Sun 22.3523 ( 8h 27m GMT) Dec 2002 > JD 2452631.0697 Sun 22.5697 (13h 40m GMT) Dec 2002 > JD 2452631.2870 Sun 22.7870 (18h 53m GMT) Dec 2002 > JD 2452631.5044 Mon 23.0044 ( 0h 6m GMT) Dec 2002 > JD 2452631.7217 Mon 23.2217 ( 5h 19m GMT) Dec 2002 > JD 2452631.9391 Mon 23.4391 (10h 32m GMT) Dec 2002 > JD 2452632.1564 Mon 23.6564 (15h 45m GMT) Dec 2002 > JD 2452632.3737 Mon 23.8737 (20h 58m GMT) Dec 2002 > JD 2452632.5911 Tue 24.0911 ( 2h 11m GMT) Dec 2002 > JD 2452632.8084 Tue 24.3084 ( 7h 24m GMT) Dec 2002 > JD 2452633.0258 Tue 24.5258 (12h 37m GMT) Dec 2002 > JD 2452633.2431 Tue 24.7431 (17h 50m GMT) Dec 2002 > JD 2452633.4604 Tue 24.9604 (23h 3m GMT) Dec 2002 > JD 2452633.6778 Wed 25.1778 ( 4h 16m GMT) Dec 2002 > JD 2452633.8951 Wed 25.3951 ( 9h 29m GMT) Dec 2002 > JD 2452634.1125 Wed 25.6125 (14h 42m GMT) Dec 2002 > JD 2452634.3298 Wed 25.8298 (19h 55m GMT) Dec 2002 > JD 2452634.5472 Thu 26.0472 ( 1h 8m GMT) Dec 2002 > JD 2452634.7645 Thu 26.2645 ( 6h 21m GMT) Dec 2002 > JD 2452634.9818 Thu 26.4818 (11h 34m GMT) Dec 2002 > JD 2452635.1992 Thu 26.6992 (16h 47m GMT) Dec 2002 > JD 2452635.4165 Thu 26.9165 (21h 60m GMT) Dec 2002 > JD 2452635.6339 Fri 27.1339 ( 3h 13m GMT) Dec 2002 > JD 2452635.8512 Fri 27.3512 ( 8h 26m GMT) Dec 2002 > JD 2452636.0685 Fri 27.5685 (13h 39m GMT) Dec 2002 > JD 2452636.2859 Fri 27.7859 (18h 52m GMT) Dec 2002 > JD 2452636.5032 Sat 28.0032 ( 0h 5m GMT) Dec 2002 > JD 2452636.7206 Sat 28.2206 ( 5h 18m GMT) Dec 2002 > JD 2452636.9379 Sat 28.4379 (10h 31m GMT) Dec 2002 > JD 2452637.1553 Sat 28.6553 (15h 44m GMT) Dec 2002 > JD 2452637.3726 Sat 28.8726 (20h 57m GMT) Dec 2002 > JD 2452637.5899 Sun 29.0899 ( 2h 10m GMT) Dec 2002 > JD 2452637.8073 Sun 29.3073 ( 7h 22m GMT) Dec 2002 > JD 2452638.0246 Sun 29.5246 (12h 35m GMT) Dec 2002 > JD 2452638.2420 Sun 29.7420 (17h 48m GMT) Dec 2002 > JD 2452638.4593 Sun 29.9593 (23h 1m GMT) Dec 2002 > JD 2452638.6766 Mon 30.1766 ( 4h 14m GMT) Dec 2002 > JD 2452638.8940 Mon 30.3940 ( 9h 27m GMT) Dec 2002 > JD 2452639.1113 Mon 30.6113 (14h 40m GMT) Dec 2002 > JD 2452639.3287 Mon 30.8287 (19h 53m GMT) Dec 2002 > JD 2452639.5460 Tue 31.0460 ( 1h 6m GMT) Dec 2002 > JD 2452639.7634 Tue 31.2634 ( 6h 19m GMT) Dec 2002 > JD 2452639.9807 Tue 31.4807 (11h 32m GMT) Dec 2002 > JD 2452640.1980 Tue 31.6980 (16h 45m GMT) Dec 2002 > JD 2452640.4154 Tue 31.9154 (21h 58m GMT) Dec 2002 > JD 2452640.6327 Wed 1.1327 ( 3h 11m GMT) Jan 2003