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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 Wednesday, 20 January 2027 · astronomical night 18:58 → 06:05 (11.11 h) · Moon 96% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:55–18:30: quality 0.1M31 18:30–19:00: quality 0.3M31 19:00–20:10: quality 0.6M31 20:10–22:00: quality 0.5M31 22:00–23:05: quality 0.4M31 23:05–23:35: quality 0.3M31 23:35–23:50: quality 0.2observe M31 20:10–21:00observe M31 22:20–23:20M42M42 18:30–19:00: quality 0.1M42 19:00–22:20: quality 0.3M42 22:20–01:40: quality 0.2M42 01:40–01:50: quality 0.1M45M45 17:55–18:30: quality 0.1M45 18:30–19:00: quality 0.2M45 19:00–20:20: quality 0.4M45 20:20–01:00: quality 0.3M45 01:00–01:45: quality 0.2M45 01:45–01:50: quality 0.1observe M45 21:50–22:20NGC 7000NGC 7000 17:55–18:30: quality 0.1NGC 7000 18:30–19:00: quality 0.3NGC 7000 19:00–19:20: quality 0.6NGC 7000 19:20–19:45: quality 0.5NGC 7000 19:45–20:05: quality 0.4NGC 7000 20:05–20:15: quality 0.3NGC 7000 06:30–06:40: quality 0.2NGC 7000 06:40–07:15: quality 0.1observe NGC 7000 19:20–20:10V1057 CygV1057 Cyg 17:55–18:30: quality 0.1V1057 Cyg 18:30–19:00: quality 0.3V1057 Cyg 19:00–19:20: quality 0.6V1057 Cyg 19:20–19:45: quality 0.5V1057 Cyg 19:45–20:05: quality 0.4V1057 Cyg 20:05–20:15: quality 0.3V1057 Cyg 06:30–06:40: quality 0.2V1057 Cyg 06:40–07:15: quality 0.1observe V1057 Cyg 18:30–19:20M33M33 17:55–18:30: quality 0.1M33 18:30–19:00: quality 0.3M33 19:00–19:20: quality 0.6M33 19:20–21:30: quality 0.5M33 21:30–23:10: quality 0.4M33 23:10–23:40: quality 0.3M33 23:40–00:00: quality 0.2observe M33 21:00–21:50observe M33 23:20–23:25scheduleV1057 CygNGC 7000M31M33M3118:0020:0022:0000:0002:0004:0006:00

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
18:30–19:20 V1057 Cyg 0.83 0.43
19:20–20:10 NGC 7000 0.83 0.44
20:10–21:00 M31 0.83 0.52
21:00–21:50 M33 0.83 0.45
21:50–22:20 M45 0.5 0.31
22:20–23:20 M31 1.0 0.39
23:20–23:25 M33 0.08 0.31
23:25–07:45 — nothing worth pointing at — 8.33

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 37 unknown 19:00–23:20 (marginal) 89.6° at 17:05 71.8° 1.83
M42 Great Orion Nebula 13 unknown 19:15–19:20 (marginal) 42.9° at 22:00 35.4° 0.0
M45 Seven Sisters 22 unknown 19:00–22:20 (marginal) 72.5° at 20:10 38.5° 0.5
NGC 7000 North America Nebula 14 unknown 19:00–19:10 (good) 87.2° at 13:20 101.9° 0.83
V1057 Cyg 14 unknown 19:00–19:10 (good) 87.3° at 13:20 102.0° 0.83
M33 Triangulum Pinwheel 33 unknown 19:00–23:25 (marginal) 79.1° at 17:55 65.3° 0.92

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-01-20"

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"}.