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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 Wednesday, 09 September 2026 · astronomical night 21:16 → 05:20 (8.05 h) · Moon 2% (new moon) · weather: ERA5 history

M31M31 19:40–20:10: unusableM31 20:10–21:00: poorM31 21:00–21:20: marginalM31 21:20–05:00: goodM31 05:00–06:00: poorM31 06:00–07:00: unusableobserve M31 23:35–01:00M42M42 19:40–03:55: unusableM42 03:55–04:30: marginalM42 04:30–05:00: goodM42 05:00–06:00: poorM42 06:00–07:00: unusableobserve M42 03:55–05:00M45M45 19:40–00:20: unusableM45 00:20–00:50: marginalM45 00:50–05:00: goodM45 05:00–06:00: poorM45 06:00–07:00: unusableobserve M45 02:25–03:55NGC 7000NGC 7000 19:40–20:10: unusableNGC 7000 20:10–20:45: poorNGC 7000 20:45–21:20: marginalNGC 7000 21:20–05:00: goodNGC 7000 05:00–06:00: poorNGC 7000 06:00–07:00: unusableobserve NGC 7000 20:45–22:10V1057 CygV1057 Cyg 19:40–20:10: unusableV1057 Cyg 20:10–20:45: poorV1057 Cyg 20:45–21:20: marginalV1057 Cyg 21:20–05:00: goodV1057 Cyg 05:00–06:00: poorV1057 Cyg 06:00–07:00: unusableobserve V1057 Cyg 22:10–23:35M33M33 19:40–21:45: unusableM33 21:45–22:20: marginalM33 22:20–05:00: goodM33 05:00–06:00: poorM33 06:00–07:00: unusableobserve M33 01:00–02:25scheduleNGC 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
19:40–20:45 — nothing worth pointing at — 1.08
20:45–22:10 NGC 7000 1.42 0.68
22:10–23:35 V1057 Cyg 1.42 0.93
23:35–01:00 M31 1.42 0.97
01:00–02:25 M33 1.42 0.91
02:25–03:55 M45 1.5 0.78
03:55–05:00 M42 1.08 0.58
05:00–07:00 — nothing worth pointing at — 2.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 85 21:20–05:00 (good) 89.7° at 02:50 117.7° 1.42
M42 Great Orion Nebula 26 16 04:30–05:00 (good) 42.9° at 07:40 71.3° 1.08
M45 Seven Sisters 100 80 00:50–05:00 (good) 72.5° at 05:50 91.8° 1.5
NGC 7000 North America Nebula 100 88 21:20–05:00 (good) 87.3° at 23:05 122.3° 1.42
V1057 Cyg 100 88 21:20–05:00 (good) 87.3° at 23:05 122.4° 1.42
M33 Triangulum Pinwheel 100 85 22:20–05:00 (good) 79.1° at 03:40 116.7° 1.42
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-09-09"

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"}.