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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.

Try: an autumn deep-sky night  ·  ← previous night · next night →

Night of Friday, 04 September 2026 · astronomical night 21:26 → 05:13 (7.78 h) · Moon 43% (waning crescent) · weather: ERA5 history

M31M31 19:45–20:30: unusableM31 20:30–21:15: poorM31 21:15–21:30: marginalM31 21:30–05:15: goodM31 05:15–05:50: marginalM31 05:50–06:25: poorM31 06:25–06:55: unusableobserve M31 23:55–01:25observe M31 05:15–05:50M42M42 19:45–04:15: unusableM42 04:15–04:20: poorM42 04:20–05:15: marginalM42 05:15–06:25: poorM42 06:25–06:55: unusableobserve M42 04:25–05:15M45M45 19:45–00:40: unusableM45 00:40–01:30: marginalM45 01:30–05:15: goodM45 05:15–05:50: marginalM45 05:50–06:25: poorM45 06:25–06:55: unusableobserve M45 02:55–04:25NGC 7000NGC 7000 19:45–20:20: unusableNGC 7000 20:20–20:55: poorNGC 7000 20:55–21:30: marginalNGC 7000 21:30–05:15: goodNGC 7000 05:15–05:30: marginalNGC 7000 05:30–06:20: poorNGC 7000 06:20–06:55: unusableobserve NGC 7000 20:55–22:25V1057 CygV1057 Cyg 19:45–20:20: unusableV1057 Cyg 20:20–20:55: poorV1057 Cyg 20:55–21:30: marginalV1057 Cyg 21:30–05:15: goodV1057 Cyg 05:15–05:30: marginalV1057 Cyg 05:30–06:20: poorV1057 Cyg 06:20–06:55: unusableobserve V1057 Cyg 22:25–23:55M33M33 19:45–22:05: unusableM33 22:05–22:45: marginalM33 22:45–05:15: goodM33 05:15–05:50: marginalM33 05:50–06:25: poorM33 06:25–06:55: unusableobserve M33 01:25–02:55scheduleNGC 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
19:45–20:55 — nothing worth pointing at — 1.17
20:55–22:25 NGC 7000 1.5 0.72
22:25–23:55 V1057 Cyg 1.5 0.94
23:55–01:25 M31 1.5 0.84
01:25–02:55 M33 1.5 0.8
02:55–04:25 M45 1.5 0.69
04:25–05:15 M42 0.83 0.44
05:15–05:50 M31 0.58 0.38
05:50–06:55 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 95 92 21:30–05:15 (good) 89.6° at 03:10 56.4° 2.08
M42 Great Orion Nebula 8 8 04:20–05:15 (marginal) 42.9° at 08:00 33.7° 0.83
M45 Seven Sisters 56 56 01:30–05:15 (good) 72.5° at 06:10 20.6° 1.5
NGC 7000 North America Nebula 100 97 21:30–05:15 (good) 87.3° at 23:25 91.7° 1.5
V1057 Cyg 100 97 21:30–05:15 (good) 87.3° at 23:25 91.7° 1.5
M33 Triangulum Pinwheel 86 85 22:45–05:15 (good) 79.1° at 04:00 48.1° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-09-04"

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"}.