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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 Monday, 07 September 2026 · astronomical night 21:20 → 05:17 (7.94 h) · Moon 13% (waning crescent) · weather: ERA5 history

M31M31 19:40–20:20: unusableM31 20:20–20:55: poorM31 20:55–21:25: marginalM31 21:25–05:20: goodM31 05:20–05:55: marginalM31 05:55–06:30: poorM31 06:30–06:55: unusableobserve M31 00:00–01:35M42M42 19:40–04:05: unusableM42 04:05–04:40: marginalM42 04:40–05:20: goodM42 05:20–05:55: marginalM42 05:55–06:30: poorM42 06:30–06:55: unusableobserve M42 04:45–05:55M45M45 19:40–00:25: unusableM45 00:25–00:55: marginalM45 00:55–05:20: goodM45 05:20–05:55: marginalM45 05:55–06:30: poorM45 06:30–06:55: unusableobserve M45 03:10–04:45NGC 7000NGC 7000 19:40–20:15: unusableNGC 7000 20:15–20:50: poorNGC 7000 20:50–21:25: marginalNGC 7000 21:25–05:20: goodNGC 7000 05:20–05:30: marginalNGC 7000 05:30–06:10: poorNGC 7000 06:10–06:55: unusableobserve NGC 7000 20:50–22:25V1057 CygV1057 Cyg 19:40–20:15: unusableV1057 Cyg 20:15–20:50: poorV1057 Cyg 20:50–21:25: marginalV1057 Cyg 21:25–05:20: goodV1057 Cyg 05:20–05:30: marginalV1057 Cyg 05:30–06:10: poorV1057 Cyg 06:10–06:55: unusableobserve V1057 Cyg 22:25–00:00M33M33 19:40–21:50: unusableM33 21:50–22:20: marginalM33 22:20–05:20: goodM33 05:20–05:55: marginalM33 05:55–06:30: poorM33 06:30–06:55: unusableobserve M33 01:35–03:10scheduleNGC 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
19:40–20:50 — nothing worth pointing at — 1.17
20:50–22:25 NGC 7000 1.58 0.82
22:25–00:00 V1057 Cyg 1.58 1.0
00:00–01:35 M31 1.58 1.0
01:35–03:10 M33 1.58 1.0
03:10–04:45 M45 1.58 0.95
04:45–05:55 M42 1.17 0.55
05:55–06:55 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 100 21:25–05:20 (good) 89.5° at 02:55 93.2° 1.58
M42 Great Orion Nebula 20 20 04:40–05:20 (good) 42.9° at 07:50 49.5° 1.17
M45 Seven Sisters 96 96 00:55–05:20 (good) 72.5° at 06:00 63.4° 1.58
NGC 7000 North America Nebula 100 100 21:25–05:20 (good) 87.2° at 23:15 113.5° 1.58
V1057 Cyg 100 100 21:25–05:20 (good) 87.3° at 23:15 113.5° 1.58
M33 Triangulum Pinwheel 100 100 22:20–05:20 (good) 79.1° at 03:50 89.2° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-09-07"

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"}.