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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 Thursday, 18 February 2027 · astronomical night 19:30 → 05:38 (10.13 h) · Moon 94% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 18:30–19:00: quality 0.1M31 19:00–19:35: quality 0.3M31 19:35–20:50: quality 0.6M31 20:50–21:10: quality 0.5M31 21:10–21:35: quality 0.4M31 21:35–21:55: quality 0.3observe M31 19:00–20:05M42M42 18:30–19:00: quality 0.1M42 19:00–19:35: quality 0.2M42 19:35–21:15: quality 0.4M42 21:15–23:15: quality 0.3M42 23:15–23:55: quality 0.2observe M42 22:15–22:55M45M45 18:30–19:00: quality 0.1M45 19:00–19:35: quality 0.3M45 19:35–21:20: quality 0.5M45 21:20–23:10: quality 0.4M45 23:10–23:40: quality 0.3M45 23:40–23:55: quality 0.2observe M45 21:10–22:15observe M45 22:55–23:25NGC 7000NGC 7000 04:35–04:55: quality 0.4NGC 7000 04:55–05:15: 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 04:35–05:40V1057 CygV1057 Cyg 04:35–04:55: quality 0.4V1057 Cyg 04:55–05:15: 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 05:40–06:15M33M33 18:30–19:00: quality 0.1M33 19:00–19:35: quality 0.3M33 19:35–20:45: quality 0.6M33 20:45–21:25: quality 0.5M33 21:25–21:45: quality 0.4M33 21:45–22:05: quality 0.3observe M33 20:05–21:10scheduleM31M33M45NGC 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
17:55–19:00 — nothing worth pointing at — 1.08
19:00–20:05 M31 1.08 0.46
20:05–21:10 M33 1.08 0.56
21:10–22:15 M45 1.08 0.43
22:15–22:55 M42 0.67 0.31
22:55–23:25 M45 0.5 0.34
23:25–04:35 — nothing worth pointing at — 5.17
04:35–05:40 NGC 7000 1.08 0.52
05:40–06:15 V1057 Cyg 0.58 0.37
06:15–07:15 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 22 unknown 19:35–20:00 (good) 89.5° at 15:10 92.5° 1.08
M42 Great Orion Nebula 15 unknown 19:35–22:55 (marginal) 42.9° at 20:05 48.1° 0.67
M45 Seven Sisters 27 unknown 19:35–23:25 (marginal) 72.5° at 18:15 62.1° 1.58
NGC 7000 North America Nebula 15 unknown 05:20–05:40 (good) 87.3° at 11:25 113.7° 1.08
V1057 Cyg 14 unknown 05:20–05:40 (good) 87.3° at 11:25 113.7° 0.58
M33 Triangulum Pinwheel 23 unknown 19:35–19:55 (good) 79.1° at 16:05 88.2° 1.08
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-02-18"

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"}.