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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 Monday, 21 February 2028 · astronomical night 19:33 → 05:34 (10.02 h) · Moon 10% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 18:30–19:05: quality 0.1M31 19:05–19:10: quality 0.5M31 19:10–19:35: quality 0.4M31 19:35–19:55: quality 0.9M31 19:55–20:45: quality 0.8M31 20:45–21:00: quality 0.7M31 21:00–21:20: quality 0.6M31 21:20–21:35: quality 0.5M31 21:35–21:45: quality 0.4observe M31 21:15–21:45M42M42 18:30–19:05: quality 0.1M42 19:05–19:35: quality 0.4M42 19:35–21:35: quality 0.9M42 21:35–22:45: quality 0.8M42 22:45–23:05: quality 0.7M42 23:05–23:20: quality 0.6M42 23:20–23:35: quality 0.5M42 23:35–23:45: quality 0.4observe M42 21:45–23:45M45M45 18:30–19:05: quality 0.2M45 19:05–19:35: quality 0.5M45 19:35–20:45: quality 1.0M45 20:45–22:10: quality 0.9M45 22:10–22:55: quality 0.8M45 22:55–23:10: quality 0.7M45 23:10–23:20: quality 0.6M45 23:20–23:35: quality 0.5M45 23:35–23:45: quality 0.4observe M45 19:05–20:10NGC 7000NGC 7000 04:25–04:30: quality 0.4NGC 7000 04:30–04:50: quality 0.5NGC 7000 04:50–05:05: quality 0.6NGC 7000 05:05–05:25: quality 0.7NGC 7000 05:25–05:35: quality 0.8NGC 7000 05:35–06:10: quality 0.4NGC 7000 06:10–06:40: quality 0.1observe NGC 7000 04:25–05:30V1057 CygV1057 Cyg 04:25–04:35: quality 0.4V1057 Cyg 04:35–04:50: quality 0.5V1057 Cyg 04:50–05:05: quality 0.6V1057 Cyg 05:05–05:25: quality 0.7V1057 Cyg 05:25–05:35: quality 0.8V1057 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 0.5M33 19:35–20:15: quality 0.9M33 20:15–21:05: quality 0.8M33 21:05–21:20: quality 0.7M33 21:20–21:30: quality 0.6M33 21:30–21:45: quality 0.5M33 21:45–21:55: quality 0.4observe M33 20:10–21:15scheduleM45M33M42NGC 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 M45 1.08 0.77
20:10–21:15 M33 1.08 0.8
21:15–21:45 M31 0.5 0.48
21:45–23:45 M42 2.0 0.7
23:45–04:25 — nothing worth pointing at — 4.67
04:25–05:30 NGC 7000 1.08 0.6
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 40 unknown 19:35–21:10 (good) 89.6° at 15:00 92.8° 0.5
M42 Great Orion Nebula 80 unknown 19:35–23:10 (good) 42.9° at 19:55 137.6° 2.0
M45 Seven Sisters 96 unknown 19:35–23:15 (good) 72.5° at 18:05 124.7° 1.08
NGC 7000 North America Nebula 20 unknown 05:00–05:35 (good) 87.2° at 11:15 68.1° 1.08
V1057 Cyg 20 unknown 05:00–05:35 (good) 87.3° at 11:15 68.0° 0.67
M33 Triangulum Pinwheel 46 unknown 19:35–21:25 (good) 79.1° at 15:50 98.0° 1.08
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2028-02-21"

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"}.