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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, 14 September 2026 · astronomical night 21:07 → 05:26 (8.32 h) · Moon 15% (waxing crescent) · weather: ERA5 history

M31M31 19:30–20:05: unusableM31 20:05–21:10: poorM31 21:10–22:00: marginalM31 22:00–23:00: unusableM31 23:00–00:00: poorM31 00:00–03:00: goodM31 03:00–07:05: unusableobserve M31 00:00–00:55M42M42 19:30–07:05: unusableM45M45 19:30–00:00: unusableM45 00:00–00:35: marginalM45 00:35–02:00: goodM45 02:00–02:15: marginalM45 02:15–03:00: goodM45 03:00–07:05: unusableobserve M45 02:50–03:00NGC 7000NGC 7000 19:30–20:05: unusableNGC 7000 20:05–20:35: poorNGC 7000 20:35–21:00: marginalNGC 7000 21:00–21:10: poorNGC 7000 21:10–22:00: marginalNGC 7000 22:00–23:00: unusableNGC 7000 23:00–00:00: poorNGC 7000 00:00–03:00: goodNGC 7000 03:00–07:05: unusableobserve NGC 7000 21:10–22:00observe NGC 7000 00:55–01:25V1057 CygV1057 Cyg 19:30–20:05: unusableV1057 Cyg 20:05–20:35: poorV1057 Cyg 20:35–21:00: marginalV1057 Cyg 21:00–21:10: poorV1057 Cyg 21:10–22:00: marginalV1057 Cyg 22:00–23:00: unusableV1057 Cyg 23:00–00:00: poorV1057 Cyg 00:00–03:00: goodV1057 Cyg 03:00–07:05: unusableobserve V1057 Cyg 20:35–21:00observe V1057 Cyg 01:25–01:55M33M33 19:30–21:25: unusableM33 21:25–22:00: poorM33 22:00–23:00: unusableM33 23:00–00:00: poorM33 00:00–03:00: goodM33 03:00–07:05: unusableobserve M33 01:55–02:50scheduleNGC 7000M31M3320:0022:0000:0002:0004:0006:00

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

Schedule

localtargethoursmean quality
19:30–20:35 — nothing worth pointing at — 1.08
20:35–21:00 V1057 Cyg 0.42 0.37
21:00–21:10 — nothing worth pointing at — 0.17
21:10–22:00 NGC 7000 0.83 0.46
22:00–00:00 — nothing worth pointing at — 2.0
00:00–00:55 M31 0.92 0.89
00:55–01:25 NGC 7000 0.5 0.9
01:25–01:55 V1057 Cyg 0.5 0.89
01:55–02:50 M33 0.92 0.69
02:50–03:00 M45 0.17 0.63
03:00–07:05 — nothing worth pointing at — 4.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 37 00:00–03:00 (good) 89.7° at 02:30 149.9° 0.92
M42 Great Orion Nebula 35 0 — 42.9° at 07:20 125.4° 0.0
M45 Seven Sisters 100 37 00:35–02:00 (good) 72.5° at 05:35 158.5° 0.17
NGC 7000 North America Nebula 100 41 00:00–03:00 (good) 87.3° at 22:45 110.4° 1.33
V1057 Cyg 100 41 00:00–03:00 (good) 87.3° at 22:45 110.5° 0.92
M33 Triangulum Pinwheel 100 36 00:00–03:00 (good) 79.1° at 03:20 164.7° 0.92

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-09-14"

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"}.