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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, 21 February 2027 · astronomical night 19:34 → 05:34 (10.01 h) · Moon 99% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 18:30–19:05: quality 0.1M31 19:05–19:35: quality 0.4M31 19:35–20:10: quality 0.8M31 20:10–20:50: quality 0.7M31 20:50–21:05: quality 0.6M31 21:05–21:25: quality 0.5M31 21:25–21:40: quality 0.4observe M31 20:10–21:15M42M42 18:30–19:05: quality 0.1M42 19:05–19:35: quality 0.3M42 19:35–20:25: quality 0.7M42 20:25–22:20: quality 0.6M42 22:20–22:55: quality 0.5M42 22:55–23:20: quality 0.4M42 23:20–23:40: quality 0.3observe M42 22:20–23:25M45M45 18:30–19:00: quality 0.2M45 19:00–19:05: quality 0.1M45 19:05–19:35: quality 0.4M45 19:35–20:00: quality 0.9M45 20:00–21:15: quality 0.8M45 21:15–22:35: quality 0.7M45 22:35–23:00: quality 0.6M45 23:00–23:20: quality 0.5M45 23:20–23:35: quality 0.4M45 23:35–23:40: quality 0.3observe M45 21:15–22:20observe M45 23:25–23:40NGC 7000NGC 7000 04:25–04:40: quality 0.4NGC 7000 04:40–05:00: quality 0.5NGC 7000 05:00–05:20: quality 0.6NGC 7000 05:20–05:35: quality 0.7NGC 7000 05:35–06:10: quality 0.4NGC 7000 06:10–06:40: quality 0.1observe NGC 7000 04:25–05:30V1057 CygV1057 Cyg 04:25–04:45: quality 0.4V1057 Cyg 04:45–05:00: quality 0.5V1057 Cyg 05:00–05:20: quality 0.6V1057 Cyg 05:20–05:35: quality 0.7V1057 Cyg 05:35–06:10: quality 0.4V1057 Cyg 06:10–06:40: quality 0.1observe V1057 Cyg 05:30–06:10M33M33 18:30–19:05: quality 0.1M33 19:05–19:35: quality 0.4M33 19:35–20:30: quality 0.8M33 20:30–21:05: quality 0.7M33 21:05–21:20: quality 0.6M33 21:20–21:35: quality 0.5M33 21:35–21:50: quality 0.4observe M33 19:05–20:10scheduleM33M31M45M42NGC 700020:0022:0000:0002:0004:0006:00

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
18:00–19:05 — nothing worth pointing at — 1.08
19:05–20:10 M33 1.08 0.62
20:10–21:15 M31 1.08 0.66
21:15–22:20 M45 1.08 0.71
22:20–23:25 M42 1.08 0.46
23:25–23:40 M45 0.25 0.37
23:40–04:25 — nothing worth pointing at — 4.75
04:25–05:30 NGC 7000 1.08 0.53
05:30–06:10 V1057 Cyg 0.67 0.41
06:10–07:10 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 32 unknown 19:35–20:55 (good) 89.7° at 15:00 130.2° 1.08
M42 Great Orion Nebula 43 unknown 19:35–21:25 (good) 42.9° at 19:50 82.9° 1.08
M45 Seven Sisters 68 unknown 19:35–22:55 (good) 72.5° at 18:05 106.6° 1.33
NGC 7000 North America Nebula 16 unknown 05:10–05:35 (good) 87.2° at 11:15 124.6° 1.08
V1057 Cyg 16 unknown 05:10–05:35 (good) 87.3° at 11:15 124.6° 0.67
M33 Triangulum Pinwheel 37 unknown 19:35–21:15 (good) 79.1° at 15:50 131.0° 1.08
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-02-21"

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"}.