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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, 17 February 2027 · astronomical night 19:29 → 05:39 (10.18 h) · Moon 87% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 18:25–19:00: quality 0.1M31 19:00–19:30: quality 0.3M31 19:30–19:50: quality 0.6M31 19:50–21:05: quality 0.5M31 21:05–21:30: quality 0.4M31 21:30–21:55: quality 0.3M31 21:55–22:00: quality 0.2observe M31 19:30–20:25M42M42 18:25–19:00: quality 0.1M42 19:00–19:30: quality 0.2M42 19:30–19:50: quality 0.4M42 19:50–23:20: quality 0.3M42 23:20–00:00: quality 0.2observe M42 22:15–22:55M45M45 18:25–19:00: quality 0.1M45 19:00–19:30: quality 0.2M45 19:30–19:35: quality 0.5M45 19:35–22:55: quality 0.4M45 22:55–23:35: quality 0.3M45 23:35–00:00: quality 0.2observe M45 21:20–22:15observe M45 22:55–23:20NGC 7000NGC 7000 04:40–05:00: quality 0.4NGC 7000 05:00–05:15: quality 0.5NGC 7000 05:15–05:30: quality 0.6NGC 7000 05:30–05:40: quality 0.7NGC 7000 05:40–06:15: quality 0.4NGC 7000 06:15–06:45: quality 0.1observe NGC 7000 04:40–05:35V1057 CygV1057 Cyg 04:40–05:00: quality 0.4V1057 Cyg 05:00–05:15: quality 0.5V1057 Cyg 05:15–05:30: quality 0.6V1057 Cyg 05:30–05:40: quality 0.7V1057 Cyg 05:40–06:15: quality 0.4V1057 Cyg 06:15–06:45: quality 0.1observe V1057 Cyg 05:35–06:15M33M33 18:25–19:00: quality 0.1M33 19:00–19:30: quality 0.3M33 19:30–19:40: quality 0.6M33 19:40–21:15: quality 0.5M33 21:15–21:40: quality 0.4M33 21:40–22:05: quality 0.3M33 22:05–22:10: quality 0.2observe M33 20:25–21:20scheduleM31M33M45NGC 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
17:55–19:30 — nothing worth pointing at — 1.58
19:30–20:25 M31 0.92 0.54
20:25–21:20 M33 0.92 0.48
21:20–22:15 M45 0.92 0.38
22:15–22:55 M42 0.67 0.31
22:55–23:20 M45 0.42 0.33
23:20–04:40 — nothing worth pointing at — 5.33
04:40–05:35 NGC 7000 0.92 0.51
05:35–06:15 V1057 Cyg 0.67 0.45
06:15–07:15 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 19 unknown 19:30–21:45 (marginal) 89.7° at 15:15 79.4° 0.92
M42 Great Orion Nebula 13 unknown 19:30–22:55 (marginal) 42.9° at 20:10 39.1° 0.67
M45 Seven Sisters 20 unknown 19:30–23:20 (marginal) 72.5° at 18:20 47.2° 1.33
NGC 7000 North America Nebula 15 unknown 05:25–05:40 (good) 87.2° at 11:30 106.6° 0.92
V1057 Cyg 15 unknown 05:25–05:40 (good) 87.3° at 11:30 106.6° 0.67
M33 Triangulum Pinwheel 19 unknown 19:30–21:50 (marginal) 79.1° at 16:05 73.8° 0.92
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-02-17"

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"}.