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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, 01 February 2027 · astronomical night 19:11 → 05:57 (10.77 h) · Moon 19% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 18:10–18:40: quality 0.2M31 18:40–19:15: quality 0.5M31 19:15–19:45: quality 1.0M31 19:45–21:10: quality 0.9M31 21:10–22:05: quality 0.8M31 22:05–22:20: quality 0.7M31 22:20–22:35: quality 0.6M31 22:35–22:50: quality 0.5M31 22:50–23:00: quality 0.4observe M31 18:40–19:50M42M42 18:10–18:40: quality 0.1M42 18:40–19:15: quality 0.4M42 19:15–19:30: quality 0.8M42 19:30–22:55: quality 0.9M42 22:55–00:05: quality 0.8M42 00:05–00:20: quality 0.7M42 00:20–00:40: quality 0.6M42 00:40–00:55: quality 0.5M42 00:55–01:00: quality 0.4observe M42 22:10–01:00M45M45 18:10–18:40: quality 0.2M45 18:40–19:15: quality 0.5M45 19:15–22:05: quality 1.0M45 22:05–23:25: quality 0.9M45 23:25–00:15: quality 0.8M45 00:15–00:25: quality 0.7M45 00:25–00:40: quality 0.6M45 00:40–00:55: quality 0.5M45 00:55–01:00: quality 0.4observe M45 21:00–22:10NGC 7000NGC 7000 18:10–18:40: quality 0.1NGC 7000 18:40–19:10: quality 0.3NGC 7000 19:10–19:15: quality 0.2NGC 7000 19:15–19:20: quality 0.5NGC 7000 19:20–19:30: quality 0.4NGC 7000 05:40–05:55: quality 0.4NGC 7000 05:55–06:00: quality 0.5NGC 7000 06:00–06:05: quality 0.2NGC 7000 06:05–06:30: quality 0.3NGC 7000 06:30–07:05: quality 0.1observe NGC 7000 05:40–06:00observe NGC 7000 06:20–06:30V1057 CygV1057 Cyg 18:10–18:40: quality 0.1V1057 Cyg 18:40–19:10: quality 0.3V1057 Cyg 19:10–19:15: quality 0.2V1057 Cyg 19:15–19:20: quality 0.5V1057 Cyg 19:20–19:30: quality 0.4V1057 Cyg 05:40–05:55: quality 0.4V1057 Cyg 05:55–06:00: quality 0.5V1057 Cyg 06:00–06:05: quality 0.2V1057 Cyg 06:05–06:30: quality 0.3V1057 Cyg 06:30–07:05: quality 0.1M33M33 18:10–18:40: quality 0.2M33 18:40–19:15: quality 0.5M33 19:15–20:10: quality 1.0M33 20:10–21:35: quality 0.9M33 21:35–22:20: quality 0.8M33 22:20–22:35: quality 0.7M33 22:35–22:50: quality 0.6M33 22:50–23:05: quality 0.5M33 23:05–23:10: quality 0.4observe M33 19:50–21:00scheduleM31M33M45M4218:0020:0022:0000:0002:0004:0006:00

Each row is the target's quality through the night, white → amber → green for 0 → 0.3 → 0.6 → 1 (the same thresholds as poor / marginal / good). Dark blue: the schedule. Grey columns: twilight.  Download: schedule CSV · targets CSV · JSON

Schedule

localtargethoursmean quality
17:35–18:40 — nothing worth pointing at — 1.08
18:40–19:50 M31 1.17 0.73
19:50–21:00 M33 1.17 0.93
21:00–22:10 M45 1.17 0.98
22:10–01:00 M42 2.83 0.75
01:00–05:40 — nothing worth pointing at — 4.67
05:40–06:00 NGC 7000 0.33 0.43
06:00–06:20 — nothing worth pointing at — 0.33
06:20–06:30 NGC 7000 0.17 0.31
06:30–07:35 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 83 unknown 19:15–22:30 (good) 89.7° at 16:20 122.4° 1.17
M42 Great Orion Nebula 89 unknown 19:15–00:30 (good) 42.9° at 21:10 146.8° 2.83
M45 Seven Sisters 100 unknown 19:15–00:35 (good) 72.5° at 19:20 158.2° 1.17
NGC 7000 North America Nebula 8 unknown 05:40–06:00 (marginal) 87.3° at 12:35 87.3° 0.5
V1057 Cyg 8 unknown 05:40–06:00 (marginal) 87.3° at 12:35 87.3° 0.0
M33 Triangulum Pinwheel 91 unknown 19:15–22:40 (good) 79.1° at 17:10 130.6° 1.17

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-02-01"

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"}; an unreadable date → 400 {"error", "code": "invalid_date"}.