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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 Wednesday, 10 February 2027 · astronomical night 19:21 → 05:48 (10.45 h) · Moon 17% (waxing crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 18:20–18:50: quality 0.1M31 18:50–19:25: quality 0.4M31 19:25–21:10: quality 0.8M31 21:10–21:35: quality 0.7M31 21:35–22:00: quality 0.6M31 22:00–22:15: quality 0.5M31 22:15–22:25: quality 0.4observe M31 21:10–22:15M42M42 18:20–18:50: quality 0.1M42 18:50–19:25: quality 0.4M42 19:25–21:50: quality 0.8M42 21:50–22:20: quality 0.9M42 22:20–23:30: quality 0.8M42 23:30–23:45: quality 0.7M42 23:45–00:00: quality 0.6M42 00:00–00:20: quality 0.5M42 00:20–00:25: quality 0.4observe M42 22:15–00:25M45M45 18:20–18:50: quality 0.1M45 18:50–19:25: quality 0.5M45 19:25–22:50: quality 0.9M45 22:50–23:35: quality 0.8M45 23:35–23:50: quality 0.7M45 23:50–00:05: quality 0.6M45 00:05–00:20: quality 0.5M45 00:20–00:25: quality 0.4observe M45 20:00–21:10NGC 7000NGC 7000 18:20–18:50: quality 0.1NGC 7000 18:50–18:55: quality 0.2NGC 7000 05:05–05:15: quality 0.4NGC 7000 05:15–05:30: quality 0.5NGC 7000 05:30–05:50: quality 0.6NGC 7000 05:50–06:00: quality 0.3NGC 7000 06:00–06:25: quality 0.4NGC 7000 06:25–06:55: quality 0.1observe NGC 7000 05:05–06:15V1057 CygV1057 Cyg 18:20–18:50: quality 0.1V1057 Cyg 18:50–18:55: quality 0.2V1057 Cyg 05:05–05:15: quality 0.4V1057 Cyg 05:15–05:35: quality 0.5V1057 Cyg 05:35–05:50: quality 0.6V1057 Cyg 05:50–06:00: quality 0.3V1057 Cyg 06:00–06:25: quality 0.4V1057 Cyg 06:25–06:55: quality 0.1observe V1057 Cyg 06:15–06:25M33M33 18:20–18:50: quality 0.1M33 18:50–19:25: quality 0.4M33 19:25–19:50: quality 0.9M33 19:50–21:35: quality 0.8M33 21:35–22:00: quality 0.7M33 22:00–22:15: quality 0.6M33 22:15–22:30: quality 0.5M33 22:30–22:35: quality 0.4observe M33 18:50–20:00scheduleM33M45M31M42NGC 700018:0020:0022:0000:0002:0004:0006:00

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
17:45–18:50 — nothing worth pointing at — 1.08
18:50–20:00 M33 1.17 0.65
20:00–21:10 M45 1.17 0.93
21:10–22:15 M31 1.08 0.63
22:15–00:25 M42 2.17 0.72
00:25–05:05 — nothing worth pointing at — 4.67
05:05–06:15 NGC 7000 1.17 0.47
06:15–06:25 V1057 Cyg 0.17 0.4
06:25–07:25 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 52 unknown 19:25–21:45 (good) 89.6° at 15:45 33.5° 1.08
M42 Great Orion Nebula 87 unknown 19:25–23:55 (good) 42.9° at 20:35 76.8° 2.17
M45 Seven Sisters 93 unknown 19:25–00:00 (good) 72.5° at 18:45 49.2° 1.17
NGC 7000 North America Nebula 12 unknown 05:40–05:50 (good) 87.3° at 12:00 58.7° 1.17
V1057 Cyg 12 unknown 05:40–05:50 (good) 87.3° at 12:00 58.7° 0.17
M33 Triangulum Pinwheel 58 unknown 19:25–22:05 (good) 79.1° at 16:35 27.0° 1.17
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-02-10"

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"}.