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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 Sunday, 27 September 2026 · astronomical night 20:42 → 05:41 (8.98 h) · Moon 98% (full moon) · weather: ERA5 history

M31M31 19:05–19:40: unusableM31 19:40–21:00: poorM31 21:00–22:00: marginalM31 22:00–06:50: poorM31 06:50–07:15: unusableM42M42 19:05–02:45: unusableM42 02:45–06:50: poorM42 06:50–07:15: unusableM45M45 19:05–23:10: unusableM45 23:10–01:35: poorM45 01:35–02:00: marginalM45 02:00–02:25: poorM45 02:25–03:00: marginalM45 03:00–06:50: poorM45 06:50–07:15: unusableobserve M45 01:35–02:00observe M45 02:30–03:00NGC 7000NGC 7000 19:05–19:40: unusableNGC 7000 19:40–20:45: poorNGC 7000 20:45–03:00: marginalNGC 7000 03:00–04:50: poorNGC 7000 04:50–07:15: unusableobserve NGC 7000 20:45–22:20observe NGC 7000 02:00–02:30V1057 CygV1057 Cyg 19:05–19:40: unusableV1057 Cyg 19:40–20:45: poorV1057 Cyg 20:45–03:00: marginalV1057 Cyg 03:00–04:50: poorV1057 Cyg 04:50–07:15: unusableobserve V1057 Cyg 22:20–01:35M33M33 19:05–20:35: unusableM33 20:35–06:50: poorM33 06:50–07:15: unusablescheduleNGC 7000V1057 Cyg20:0022:0000:0002:0004:0006:00

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

Schedule

localtargethoursmean quality
19:05–20:45 — nothing worth pointing at — 1.67
20:45–22:20 NGC 7000 1.58 0.45
22:20–01:35 V1057 Cyg 3.25 0.4
01:35–02:00 M45 0.42 0.3
02:00–02:30 NGC 7000 0.5 0.4
02:30–03:00 M45 0.5 0.31
03:00–07:15 — nothing worth pointing at — 4.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 34 24 21:00–22:00 (marginal) 89.6° at 01:40 30.2° 0.0
M42 Great Orion Nebula 19 9 — 42.9° at 06:30 68.3° 0.0
M45 Seven Sisters 25 17 02:25–03:00 (marginal) 72.5° at 04:40 39.2° 0.92
NGC 7000 North America Nebula 65 50 20:45–03:00 (marginal) 87.3° at 21:55 62.4° 2.08
V1057 Cyg 65 50 20:45–03:00 (marginal) 87.3° at 21:55 62.3° 3.25
M33 Triangulum Pinwheel 26 18 — 79.1° at 02:30 19.8° 0.0

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-09-27"

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"}.