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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, 13 February 2031 · astronomical night 19:24 → 05:44 (10.33 h) · Moon 61% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 18:25–18:55: quality 0.1M31 18:55–19:25: quality 0.5M31 19:25–20:25: quality 0.9M31 20:25–21:15: quality 0.8M31 21:15–21:35: quality 0.7M31 21:35–21:50: quality 0.6M31 21:50–22:05: quality 0.5M31 22:05–22:15: quality 0.4observe M31 21:15–22:05M42M42 18:25–18:55: quality 0.1M42 18:55–19:25: quality 0.4M42 19:25–22:10: quality 0.9M42 22:10–23:20: quality 0.8M42 23:20–23:35: quality 0.7M42 23:35–23:50: quality 0.6M42 23:50–00:05: quality 0.5M42 00:05–00:15: quality 0.4observe M42 22:05–00:15M45M45 18:25–18:55: quality 0.2M45 18:55–19:25: quality 0.5M45 19:25–21:20: quality 1.0M45 21:20–22:40: quality 0.9M45 22:40–23:25: quality 0.8M45 23:25–23:40: quality 0.7M45 23:40–23:55: quality 0.6M45 23:55–00:05: quality 0.5M45 00:05–00:15: quality 0.4observe M45 20:05–21:15NGC 7000NGC 7000 18:25–18:45: quality 0.1NGC 7000 04:55–05:15: quality 0.4NGC 7000 05:15–05:35: quality 0.5NGC 7000 05:35–05:45: quality 0.6NGC 7000 05:45–06:00: quality 0.3NGC 7000 06:00–06:20: quality 0.4NGC 7000 06:20–06:50: quality 0.1observe NGC 7000 04:55–06:05V1057 CygV1057 Cyg 18:25–18:45: quality 0.1V1057 Cyg 04:55–05:15: quality 0.4V1057 Cyg 05:15–05:35: quality 0.5V1057 Cyg 05:35–05:45: quality 0.6V1057 Cyg 05:45–06:00: quality 0.3V1057 Cyg 06:00–06:20: quality 0.4V1057 Cyg 06:20–06:50: quality 0.1observe V1057 Cyg 06:05–06:20M33M33 18:25–18:45: quality 0.2M33 18:45–18:55: quality 0.1M33 18:55–19:25: quality 0.5M33 19:25–20:45: quality 0.9M33 20:45–21:35: quality 0.8M33 21:35–21:50: quality 0.7M33 21:50–22:00: quality 0.6M33 22:00–22:15: quality 0.5M33 22:15–22:25: quality 0.4observe M33 18:55–20:05scheduleM33M45M31M42NGC 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
17:50–18:55 — nothing worth pointing at — 1.08
18:55–20:05 M33 1.17 0.74
20:05–21:15 M45 1.17 0.99
21:15–22:05 M31 0.83 0.6
22:05–00:15 M42 2.17 0.71
00:15–04:55 — nothing worth pointing at — 4.67
04:55–06:05 NGC 7000 1.17 0.44
06:05–06:20 V1057 Cyg 0.25 0.36
06:20–07:20 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 56 unknown 19:25–21:40 (good) 89.6° at 15:30 145.8° 0.83
M42 Great Orion Nebula 89 unknown 19:25–23:45 (good) 42.9° at 20:25 130.4° 2.17
M45 Seven Sisters 100 unknown 19:25–23:45 (good) 72.5° at 18:35 162.2° 1.17
NGC 7000 North America Nebula 10 unknown 04:55–06:20 (marginal) 87.2° at 11:45 105.9° 1.17
V1057 Cyg 10 unknown 04:55–06:20 (marginal) 87.3° at 11:45 105.9° 0.25
M33 Triangulum Pinwheel 63 unknown 19:25–21:55 (good) 79.1° at 16:25 160.4° 1.17
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-02-13"

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"}.