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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 Tuesday, 22 September 2026 · astronomical night 20:51 → 05:35 (8.73 h) · Moon 85% (waxing gibbous) · weather: ERA5 history

M31M31 19:15–22:00: unusableM31 22:00–23:00: poorM31 23:00–03:00: unusableM31 03:00–04:00: marginalM31 04:00–05:40: goodM31 05:40–06:10: marginalM31 06:10–06:45: poorM31 06:45–07:10: unusableobserve M31 03:35–04:10M42M42 19:15–03:05: unusableM42 03:05–03:25: poorM42 03:25–04:00: marginalM42 04:00–05:40: goodM42 05:40–06:10: marginalM42 06:10–06:45: poorM42 06:45–07:10: unusableobserve M42 04:45–05:20M45M45 19:15–03:00: unusableM45 03:00–04:00: marginalM45 04:00–05:40: goodM45 05:40–06:10: marginalM45 06:10–06:45: poorM45 06:45–07:10: unusableobserve M45 03:00–03:35observe M45 05:20–06:10NGC 7000NGC 7000 19:15–22:00: unusableNGC 7000 22:00–23:00: poorNGC 7000 23:00–03:00: unusableNGC 7000 03:00–04:00: marginalNGC 7000 04:00–04:25: goodNGC 7000 04:25–05:10: marginalNGC 7000 05:10–07:10: unusableV1057 CygV1057 Cyg 19:15–22:00: unusableV1057 Cyg 22:00–23:00: poorV1057 Cyg 23:00–03:00: unusableV1057 Cyg 03:00–04:00: marginalV1057 Cyg 04:00–04:25: goodV1057 Cyg 04:25–05:10: marginalV1057 Cyg 05:10–07:10: unusableM33M33 19:15–22:00: unusableM33 22:00–23:00: poorM33 23:00–03:00: unusableM33 03:00–04:00: marginalM33 04:00–05:40: goodM33 05:40–06:10: marginalM33 06:10–06:45: poorM33 06:45–07:10: unusableobserve M33 04:10–04:45scheduleM4520:0022:0000:0002:0004:0006:00

Faded bands: each target's own windows (green good, amber marginal, pink poor). Dark blue: the schedule. Grey columns: twilight.

Schedule

localtargethoursmean quality
19:15–03:00 — nothing worth pointing at — 7.75
03:00–03:35 M45 0.58 0.52
03:35–04:10 M31 0.58 0.66
04:10–04:45 M33 0.58 0.92
04:45–05:20 M42 0.58 0.74
05:20–06:10 M45 0.83 0.58
06:10–07:10 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 32 04:00–05:40 (good) 89.5° at 02:00 76.7° 0.58
M42 Great Orion Nebula 48 38 04:00–05:40 (good) 42.9° at 06:50 122.1° 0.58
M45 Seven Sisters 100 42 04:00–05:40 (good) 72.5° at 05:00 105.1° 1.42
NGC 7000 North America Nebula 84 18 04:00–04:25 (good) 87.3° at 22:15 62.1° 0.0
V1057 Cyg 84 18 04:00–04:25 (good) 87.3° at 22:15 62.0° 0.0
M33 Triangulum Pinwheel 100 34 04:00–05:40 (good) 79.1° at 02:50 79.6° 0.58

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-09-22"

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"}.