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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 Saturday, 20 February 2027 · astronomical night 19:32 → 05:35 (10.05 h) · Moon 100% (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 19:35–19:55: quality 0.8M31 19:55–20:50: quality 0.7M31 20:50–21:05: quality 0.6M31 21:05–21:25: quality 0.5M31 21:25–21:45: 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 0.6M42 20:25–22:30: quality 0.5M42 22:30–23:05: quality 0.4M42 23:05–23:35: quality 0.3M42 23:35–23:45: quality 0.2observe M42 22:20–23:20M45M45 18:30–19:05: quality 0.1M45 19:05–19:35: quality 0.4M45 19:35–19:50: quality 0.8M45 19:50–21:20: quality 0.7M45 21:20–22:45: quality 0.6M45 22:45–23:10: quality 0.5M45 23:10–23:30: quality 0.4M45 23:30–23:45: quality 0.3observe M45 21:15–22:20observe M45 23:20–23:40NGC 7000NGC 7000 04:25–04:45: quality 0.4NGC 7000 04:45–05:05: quality 0.5NGC 7000 05:05–05:25: quality 0.6NGC 7000 05:25–05:40: quality 0.7NGC 7000 05:40–06:10: quality 0.4NGC 7000 06:10–06:45: quality 0.1observe NGC 7000 04:25–05:30V1057 CygV1057 Cyg 04:25–04:45: quality 0.4V1057 Cyg 04:45–05:05: quality 0.5V1057 Cyg 05:05–05:25: quality 0.6V1057 Cyg 05:25–05:40: quality 0.7V1057 Cyg 05:40–06:10: quality 0.4V1057 Cyg 06:10–06:45: quality 0.1observe V1057 Cyg 05:30–06:10M33M33 18:30–19:05: quality 0.1M33 19:05–19:35: quality 0.4M33 19:35–20:10: quality 0.8M33 20:10–21:05: quality 0.7M33 21:05–21:20: quality 0.6M33 21:20–21:40: quality 0.5M33 21:40–21:55: 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 0.6
20:10–21:15 M31 1.08 0.65
21:15–22:20 M45 1.08 0.61
22:20–23:20 M42 1.0 0.4
23:20–23:40 M45 0.33 0.35
23:40–04:25 — nothing worth pointing at — 4.75
04:25–05:30 NGC 7000 1.08 0.51
05:30–06:10 V1057 Cyg 0.67 0.45
06:10–07:10 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 31 unknown 19:35–21:00 (good) 89.7° at 15:05 118.3° 1.08
M42 Great Orion Nebula 31 unknown 19:35–23:20 (marginal) 42.9° at 19:55 70.8° 1.0
M45 Seven Sisters 53 unknown 19:35–22:00 (good) 72.5° at 18:10 91.9° 1.42
NGC 7000 North America Nebula 17 unknown 05:15–05:40 (good) 87.2° at 11:15 123.2° 1.08
V1057 Cyg 17 unknown 05:15–05:40 (good) 87.3° at 11:15 123.3° 0.67
M33 Triangulum Pinwheel 35 unknown 19:35–21:15 (good) 79.1° at 15:55 117.0° 1.08
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-02-20"

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"}.