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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, 10 September 2026 · astronomical night 21:14 → 05:21 (8.11 h) · Moon 0% (new moon) · weather: ERA5 history

M31M31 19:35–20:10: unusableM31 20:10–20:45: poorM31 20:45–21:15: marginalM31 21:15–05:25: goodM31 05:25–06:00: marginalM31 06:00–06:30: poorM31 06:30–07:00: unusableobserve M31 23:55–01:30M42M42 19:35–03:50: unusableM42 03:50–04:25: marginalM42 04:25–05:25: goodM42 05:25–06:00: marginalM42 06:00–06:30: poorM42 06:30–07:00: unusableobserve M42 04:40–06:00M45M45 19:35–00:15: unusableM45 00:15–00:45: marginalM45 00:45–05:25: goodM45 05:25–06:00: marginalM45 06:00–06:30: poorM45 06:30–07:00: unusableobserve M45 03:05–04:40NGC 7000NGC 7000 19:35–20:10: unusableNGC 7000 20:10–20:45: poorNGC 7000 20:45–21:15: marginalNGC 7000 21:15–05:20: goodNGC 7000 05:20–05:25: marginalNGC 7000 05:25–05:55: poorNGC 7000 05:55–07:00: unusableobserve NGC 7000 20:45–22:20V1057 CygV1057 Cyg 19:35–20:10: unusableV1057 Cyg 20:10–20:45: poorV1057 Cyg 20:45–21:15: marginalV1057 Cyg 21:15–05:20: goodV1057 Cyg 05:20–05:25: marginalV1057 Cyg 05:25–05:55: poorV1057 Cyg 05:55–07:00: unusableobserve V1057 Cyg 22:20–23:55M33M33 19:35–21:40: unusableM33 21:40–22:10: marginalM33 22:10–05:25: goodM33 05:25–06:00: marginalM33 06:00–06:30: poorM33 06:30–07:00: unusableobserve M33 01:30–03:05scheduleNGC 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
19:35–20:45 — nothing worth pointing at — 1.17
20:45–22:20 NGC 7000 1.58 0.83
22:20–23:55 V1057 Cyg 1.58 0.99
23:55–01:30 M31 1.58 0.99
01:30–03:05 M33 1.58 1.0
03:05–04:40 M45 1.58 0.99
04:40–06:00 M42 1.33 0.63
06:00–07:00 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 100 21:15–05:25 (good) 89.7° at 02:45 129.1° 1.58
M42 Great Orion Nebula 28 28 04:25–05:25 (good) 42.9° at 07:35 82.7° 1.33
M45 Seven Sisters 100 100 00:45–05:25 (good) 72.5° at 05:50 105.8° 1.58
NGC 7000 North America Nebula 100 99 21:15–05:20 (good) 87.2° at 23:00 123.7° 1.58
V1057 Cyg 100 99 21:15–05:20 (good) 87.3° at 23:00 123.8° 1.58
M33 Triangulum Pinwheel 100 100 22:10–05:25 (good) 79.1° at 03:35 129.9° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-09-10"

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"}.