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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 Friday, 22 January 2027 · astronomical night 19:00 → 06:04 (11.06 h) · Moon 100% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:55–18:30: quality 0.1M31 18:30–19:05: quality 0.4M31 19:05–20:10: quality 0.8M31 20:10–21:25: quality 0.7M31 21:25–22:40: quality 0.6M31 22:40–23:00: quality 0.5M31 23:00–23:25: quality 0.4M31 23:25–23:40: quality 0.3observe M31 21:20–22:30M42M42 18:25–18:30: quality 0.1M42 18:30–19:05: quality 0.2M42 19:05–20:30: quality 0.5M42 20:30–23:25: quality 0.4M42 23:25–01:00: quality 0.3M42 01:00–01:40: quality 0.2observe M42 23:40–00:40M45M45 17:55–18:30: quality 0.1M45 18:30–19:05: quality 0.3M45 19:05–19:30: quality 0.7M45 19:30–22:00: quality 0.6M45 22:00–23:40: quality 0.5M45 23:40–01:00: quality 0.4M45 01:00–01:25: quality 0.3M45 01:25–01:40: quality 0.2observe M45 22:30–23:40observe M45 00:40–01:10NGC 7000NGC 7000 17:55–18:30: quality 0.1NGC 7000 18:30–19:05: quality 0.4NGC 7000 19:05–19:10: quality 0.7NGC 7000 19:10–19:30: quality 0.6NGC 7000 19:30–19:50: quality 0.5NGC 7000 19:50–20:10: quality 0.4NGC 7000 06:20–06:40: quality 0.2NGC 7000 06:40–07:15: quality 0.1observe NGC 7000 18:30–19:40V1057 CygV1057 Cyg 17:55–18:30: quality 0.1V1057 Cyg 18:30–19:00: quality 0.4V1057 Cyg 19:00–19:05: quality 0.3V1057 Cyg 19:05–19:10: quality 0.7V1057 Cyg 19:10–19:30: quality 0.6V1057 Cyg 19:30–19:50: quality 0.5V1057 Cyg 19:50–20:10: quality 0.4V1057 Cyg 06:20–06:40: quality 0.2V1057 Cyg 06:40–07:15: quality 0.1observe V1057 Cyg 19:40–20:10M33M33 17:55–18:30: quality 0.1M33 18:30–19:05: quality 0.4M33 19:05–20:15: quality 0.8M33 20:15–21:30: quality 0.7M33 21:30–22:55: quality 0.6M33 22:55–23:15: quality 0.5M33 23:15–23:35: quality 0.4M33 23:35–23:50: quality 0.3observe M33 20:10–21:20scheduleNGC 7000M33M31M45M4218:0020:0022:0000:0002:0004:0006:00

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
17:20–18:30 — nothing worth pointing at — 1.17
18:30–19:40 NGC 7000 1.17 0.48
19:40–20:10 V1057 Cyg 0.5 0.42
20:10–21:20 M33 1.17 0.71
21:20–22:30 M31 1.17 0.62
22:30–23:40 M45 1.17 0.48
23:40–00:40 M42 1.0 0.33
00:40–01:10 M45 0.5 0.36
01:10–07:45 — nothing worth pointing at — 6.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 64 unknown 19:05–22:10 (good) 89.6° at 17:00 98.5° 1.17
M42 Great Orion Nebula 31 unknown 19:05–00:40 (marginal) 42.9° at 21:50 52.9° 1.0
M45 Seven Sisters 60 unknown 19:05–20:40 (good) 72.5° at 20:00 68.9° 1.67
NGC 7000 North America Nebula 16 unknown 19:05–19:20 (good) 87.3° at 13:15 116.5° 1.17
V1057 Cyg 16 unknown 19:05–19:20 (good) 87.3° at 13:15 116.5° 0.5
M33 Triangulum Pinwheel 65 unknown 19:05–22:10 (good) 79.1° at 17:50 94.8° 1.17
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-01-22"

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"}.