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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 Tuesday, 23 February 2027 · astronomical night 19:36 → 05:31 (9.92 h) · Moon 89% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 18:35–19:05: quality 0.1M31 19:05–19:40: quality 0.4M31 19:40–19:45: quality 0.9M31 19:45–20:35: quality 0.8M31 20:35–20:55: quality 0.7M31 20:55–21:10: quality 0.6M31 21:10–21:25: quality 0.5M31 21:25–21:35: quality 0.4observe M31 20:10–21:10M42M42 18:35–19:05: quality 0.1M42 19:05–19:40: quality 0.4M42 19:40–21:25: quality 0.9M42 21:25–21:30: quality 0.8M42 21:30–22:40: quality 0.7M42 22:40–22:55: quality 0.6M42 22:55–23:15: quality 0.5M42 23:15–23:30: quality 0.4M42 23:30–23:35: quality 0.3observe M42 21:40–23:35M45M45 18:35–19:05: quality 0.2M45 19:05–19:40: quality 0.5M45 19:40–20:40: quality 1.0M45 20:40–21:25: quality 0.9M45 21:25–22:25: quality 0.8M45 22:25–22:50: quality 0.7M45 22:50–23:05: quality 0.6M45 23:05–23:20: quality 0.5M45 23:20–23:35: quality 0.4observe M45 19:05–20:10NGC 7000NGC 7000 04:15–04:35: quality 0.4NGC 7000 04:35–04:50: quality 0.5NGC 7000 04:50–05:10: quality 0.6NGC 7000 05:10–05:35: quality 0.7NGC 7000 05:35–06:05: quality 0.4NGC 7000 06:05–06:40: quality 0.1observe NGC 7000 04:15–05:20V1057 CygV1057 Cyg 04:15–04:35: quality 0.4V1057 Cyg 04:35–04:55: quality 0.5V1057 Cyg 04:55–05:10: quality 0.6V1057 Cyg 05:10–05:35: quality 0.7V1057 Cyg 05:35–06:05: quality 0.4V1057 Cyg 06:05–06:40: quality 0.1observe V1057 Cyg 05:20–06:05M33M33 18:35–19:05: quality 0.1M33 19:05–19:25: quality 0.5M33 19:25–19:40: quality 0.4M33 19:40–20:05: quality 0.9M33 20:05–20:55: quality 0.8M33 20:55–21:10: quality 0.7M33 21:10–21:25: quality 0.6M33 21:25–21:30: quality 0.5M33 21:30–21:45: quality 0.4observe M33 21:10–21:40scheduleM45M31M42NGC 7000V1057 Cyg20:0022:0000:0002:0004:0006:00

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 M45 1.08 0.73
20:10–21:10 M31 1.0 0.72
21:10–21:40 M33 0.5 0.52
21:40–23:35 M42 1.92 0.6
23:35–04:15 — nothing worth pointing at — 4.67
04:15–05:20 NGC 7000 1.08 0.53
05:20–06:05 V1057 Cyg 0.75 0.49
06:05–07:05 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 35 unknown 19:40–21:00 (good) 89.5° at 14:55 148.3° 1.0
M42 Great Orion Nebula 71 unknown 19:40–22:45 (good) 42.9° at 19:45 106.5° 1.92
M45 Seven Sisters 88 unknown 19:40–23:00 (good) 72.5° at 17:55 134.8° 1.08
NGC 7000 North America Nebula 18 unknown 05:00–05:35 (good) 87.3° at 11:05 120.1° 1.08
V1057 Cyg 18 unknown 05:00–05:35 (good) 87.3° at 11:05 120.2° 0.75
M33 Triangulum Pinwheel 41 unknown 19:40–21:15 (good) 79.1° at 15:45 156.2° 0.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-02-23"

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"}.