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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, 05 September 2026 · astronomical night 21:24 → 05:14 (7.83 h) · Moon 32% (waning crescent) · weather: ERA5 history

M31M31 19:45–20:30: unusableM31 20:30–21:00: poorM31 21:00–21:25: marginalM31 21:25–05:15: goodM31 05:15–05:50: marginalM31 05:50–06:25: poorM31 06:25–06:55: unusableobserve M31 23:50–01:20M42M42 19:45–04:10: unusableM42 04:10–05:10: marginalM42 05:10–05:15: goodM42 05:15–05:50: marginalM42 05:50–06:25: poorM42 06:25–06:55: unusableobserve M42 04:20–05:50M45M45 19:45–00:35: unusableM45 00:35–01:15: marginalM45 01:15–05:15: goodM45 05:15–05:50: marginalM45 05:50–06:25: poorM45 06:25–06:55: unusableobserve M45 02:50–04:20NGC 7000NGC 7000 19:45–20:20: unusableNGC 7000 20:20–20:50: poorNGC 7000 20:50–21:25: marginalNGC 7000 21:25–05:15: goodNGC 7000 05:15–05:30: marginalNGC 7000 05:30–06:15: poorNGC 7000 06:15–06:55: unusableobserve NGC 7000 20:50–22:20V1057 CygV1057 Cyg 19:45–20:20: unusableV1057 Cyg 20:20–20:50: poorV1057 Cyg 20:50–21:25: marginalV1057 Cyg 21:25–05:15: goodV1057 Cyg 05:15–05:30: marginalV1057 Cyg 05:30–06:15: poorV1057 Cyg 06:15–06:55: unusableobserve V1057 Cyg 22:20–23:50M33M33 19:45–22:00: unusableM33 22:00–22:30: marginalM33 22:30–05:15: goodM33 05:15–05:50: marginalM33 05:50–06:25: poorM33 06:25–06:55: unusableobserve M33 01:20–02:50scheduleNGC 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
19:45–20:50 — nothing worth pointing at — 1.08
20:50–22:20 NGC 7000 1.5 0.81
22:20–23:50 V1057 Cyg 1.5 1.0
23:50–01:20 M31 1.5 0.97
01:20–02:50 M33 1.5 0.89
02:50–04:20 M45 1.5 0.79
04:20–05:50 M42 1.5 0.43
05:50–06:55 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 100 21:25–05:15 (good) 89.7° at 03:05 68.3° 1.5
M42 Great Orion Nebula 12 12 05:10–05:15 (good) 42.9° at 07:55 34.9° 1.5
M45 Seven Sisters 75 75 01:15–05:15 (good) 72.5° at 06:10 34.8° 1.5
NGC 7000 North America Nebula 100 100 21:25–05:15 (good) 87.3° at 23:20 99.5° 1.5
V1057 Cyg 100 100 21:25–05:15 (good) 87.3° at 23:20 99.5° 1.5
M33 Triangulum Pinwheel 95 95 22:30–05:15 (good) 79.1° at 03:55 61.6° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-09-05"

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"}.