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Rozhen Night Plan

Up to ten targets, one night: each gets its good/marginal/poor windows (darkness × altitude × Moon × clouds, as on the single-target page), then the night is handed out five minutes at a time to whichever target is best — with hysteresis, so you get a few solid blocks of at least 30 minutes, not a flicker. Targets that never win a block are listed with the reason.

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Night of Thursday, 24 September 2026 · astronomical night 20:48 → 05:38 (8.84 h) · Moon 96% (waxing gibbous) · weather: ERA5 history

M31M31 19:15–20:00: unusableM31 20:00–21:00: poorM31 21:00–03:55: marginalM31 03:55–04:00: goodM31 04:00–05:00: marginalM31 05:00–07:15: unusableobserve M31 23:40–01:05M42M42 19:15–02:55: unusableM42 02:55–03:50: marginalM42 03:50–04:00: goodM42 04:00–05:00: marginalM42 05:00–07:15: unusableobserve M42 03:55–05:00M45M45 19:15–23:20: unusableM45 23:20–23:30: poorM45 23:30–01:40: marginalM45 01:40–02:00: goodM45 02:00–02:05: marginalM45 02:05–04:00: goodM45 04:00–05:00: marginalM45 05:00–07:15: unusableobserve M45 01:05–02:30NGC 7000NGC 7000 19:15–20:00: unusableNGC 7000 20:00–20:50: poorNGC 7000 20:50–04:00: marginalNGC 7000 04:00–05:00: poorNGC 7000 05:00–07:15: unusableobserve NGC 7000 20:50–22:15V1057 CygV1057 Cyg 19:15–20:00: unusableV1057 Cyg 20:00–20:50: poorV1057 Cyg 20:50–04:00: marginalV1057 Cyg 04:00–05:00: poorV1057 Cyg 05:00–07:15: unusableobserve V1057 Cyg 22:15–23:40M33M33 19:15–20:45: unusableM33 20:45–21:30: poorM33 21:30–03:55: marginalM33 03:55–04:00: goodM33 04:00–05:00: marginalM33 05:00–07:15: unusableobserve M33 02:30–03:55scheduleNGC 7000V1057 CygM31M45M33M4220:0022:0000:0002:0004:0006:00

Faded bands: each target's own windows (green good, amber marginal, pink poor). Dark blue: the schedule. Grey columns: twilight.

Schedule

localtargethoursmean quality
19:15–20:50 — nothing worth pointing at — 1.58
20:50–22:15 NGC 7000 1.42 0.4
22:15–23:40 V1057 Cyg 1.42 0.43
23:40–01:05 M31 1.42 0.5
01:05–02:30 M45 1.42 0.6
02:30–03:55 M33 1.42 0.56
03:55–05:00 M42 1.08 0.42
05:00–07:15 — nothing worth pointing at — 2.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 92 66 03:55–04:00 (good) 89.7° at 01:50 55.2° 1.42
M42 Great Orion Nebula 44 20 03:50–04:00 (good) 42.9° at 06:40 101.8° 1.08
M45 Seven Sisters 100 71 02:05–04:00 (good) 72.5° at 04:55 79.6° 1.42
NGC 7000 North America Nebula 58 49 20:50–04:00 (marginal) 87.2° at 22:05 56.6° 1.42
V1057 Cyg 58 49 20:50–04:00 (marginal) 87.3° at 22:05 56.5° 1.42
M33 Triangulum Pinwheel 96 69 03:55–04:00 (good) 79.1° at 02:40 55.2° 1.42
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-09-24"

targets: names or RA Dec, separated by commas, semicolons or newlines, at most ten. The response carries targets[] (score, verdict, best_window, windows, transit, moon_separation), schedule[] (blocks with target, start/end in UTC and local, hours, mean_quality; target: null is idle time), unscheduled[] with a why, forecast_source, warnings[]. Missing targets → 400 {"error", "code": "targets_missing"}.