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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 Saturday, 19 September 2026 · astronomical night 20:57 → 05:32 (8.58 h) · Moon 60% (waxing gibbous) · weather: ERA5 history

M31M31 19:20–19:55: unusableM31 19:55–20:30: poorM31 20:30–21:00: marginalM31 21:00–03:00: goodM31 03:00–04:00: marginalM31 04:00–05:35: goodM31 05:35–06:00: marginalM31 06:00–06:40: poorM31 06:40–07:10: unusableobserve M31 23:45–01:25M42M42 19:20–03:15: unusableM42 03:15–04:00: poorM42 04:00–04:05: marginalM42 04:05–05:35: goodM42 05:35–06:00: marginalM42 06:00–06:40: poorM42 06:40–07:10: unusableobserve M42 04:45–06:00M45M45 19:20–23:40: unusableM45 23:40–00:10: marginalM45 00:10–02:00: goodM45 02:00–02:05: marginalM45 02:05–03:00: goodM45 03:00–04:00: marginalM45 04:00–05:35: goodM45 05:35–06:00: marginalM45 06:00–06:40: poorM45 06:40–07:10: unusableobserve M45 03:05–04:45NGC 7000NGC 7000 19:20–19:55: unusableNGC 7000 19:55–20:25: poorNGC 7000 20:25–21:00: marginalNGC 7000 21:00–02:25: goodNGC 7000 02:25–04:00: marginalNGC 7000 04:00–04:25: goodNGC 7000 04:25–05:20: marginalNGC 7000 05:20–07:10: unusableobserve NGC 7000 20:25–22:05V1057 CygV1057 Cyg 19:20–19:55: unusableV1057 Cyg 19:55–20:25: poorV1057 Cyg 20:25–21:00: marginalV1057 Cyg 21:00–02:25: goodV1057 Cyg 02:25–04:00: marginalV1057 Cyg 04:00–04:25: goodV1057 Cyg 04:25–05:20: marginalV1057 Cyg 05:20–07:10: unusableobserve V1057 Cyg 22:05–23:45M33M33 19:20–21:05: unusableM33 21:05–21:50: marginalM33 21:50–03:00: goodM33 03:00–04:00: marginalM33 04:00–05:35: goodM33 05:35–06:00: marginalM33 06:00–06:40: poorM33 06:40–07:10: unusableobserve M33 01:25–03:05scheduleNGC 7000V1057 CygM31M33M45M4220:0022:0000:0002:0004:0006:00

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

Schedule

localtargethoursmean quality
19:20–20:25 — nothing worth pointing at — 1.08
20:25–22:05 NGC 7000 1.67 0.61
22:05–23:45 V1057 Cyg 1.67 0.82
23:45–01:25 M31 1.67 0.97
01:25–03:05 M33 1.67 0.76
03:05–04:45 M45 1.67 0.59
04:45–06:00 M42 1.25 0.6
06:00–07:10 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 83 21:00–03:00 (good) 89.7° at 02:10 108.3° 1.67
M42 Great Orion Nebula 43 31 04:05–05:35 (good) 42.9° at 07:00 144.0° 1.25
M45 Seven Sisters 100 76 00:10–02:00 (good) 72.5° at 05:15 141.3° 1.67
NGC 7000 North America Nebula 100 84 21:00–02:25 (good) 87.3° at 22:25 78.4° 1.67
V1057 Cyg 100 84 21:00–02:25 (good) 87.3° at 22:25 78.4° 1.67
M33 Triangulum Pinwheel 100 82 21:50–03:00 (good) 79.1° at 03:00 114.6° 1.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-09-19"

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"}.