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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, 18 January 2027 · astronomical night 18:56 → 06:06 (11.16 h) · Moon 82% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:50–18:25: quality 0.1M31 18:25–19:00: quality 0.2M31 19:00–20:10: quality 0.5M31 20:10–23:05: quality 0.4M31 23:05–23:40: quality 0.3M31 23:40–23:55: quality 0.2observe M31 20:15–21:20M42M42 18:25–19:00: quality 0.1M42 19:00–21:30: quality 0.3M42 21:30–01:10: quality 0.4M42 01:10–01:45: quality 0.3M42 01:45–01:55: quality 0.2observe M42 23:30–01:30M45M45 17:50–18:25: quality 0.1M45 18:25–19:00: quality 0.2M45 19:00–01:10: quality 0.4M45 01:10–01:45: quality 0.3M45 01:45–01:55: quality 0.2observe M45 22:25–23:30NGC 7000NGC 7000 17:50–18:25: quality 0.1NGC 7000 18:25–19:00: quality 0.3NGC 7000 19:00–19:10: quality 0.6NGC 7000 19:10–19:40: quality 0.5NGC 7000 19:40–20:05: quality 0.4NGC 7000 20:05–20:25: quality 0.3NGC 7000 06:35–06:40: quality 0.2NGC 7000 06:40–07:15: quality 0.1observe NGC 7000 20:05–20:15V1057 CygV1057 Cyg 17:50–18:25: quality 0.1V1057 Cyg 18:25–19:00: quality 0.3V1057 Cyg 19:00–19:10: quality 0.6V1057 Cyg 19:10–19:40: quality 0.5V1057 Cyg 19:40–20:05: quality 0.4V1057 Cyg 20:05–20:25: quality 0.3V1057 Cyg 06:35–06:40: quality 0.2V1057 Cyg 06:40–07:15: quality 0.1observe V1057 Cyg 19:00–20:05M33M33 17:50–18:25: quality 0.1M33 18:25–19:00: quality 0.2M33 19:00–22:55: quality 0.4M33 22:55–23:45: quality 0.3M33 23:45–00:05: quality 0.2observe M33 21:20–22:25scheduleV1057 CygM31M33M45M4218:0020:0022:0000:0002:0004:0006:00

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
17:15–19:00 — nothing worth pointing at — 1.75
19:00–20:05 V1057 Cyg 1.08 0.47
20:05–20:15 NGC 7000 0.17 0.33
20:15–21:20 M31 1.08 0.43
21:20–22:25 M33 1.08 0.36
22:25–23:30 M45 1.08 0.37
23:30–01:30 M42 2.0 0.38
01:30–07:45 — nothing worth pointing at — 6.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 25 unknown 19:00–23:20 (marginal) 89.7° at 17:15 47.2° 1.08
M42 Great Orion Nebula 25 unknown 19:15–01:30 (marginal) 42.9° at 22:05 36.5° 2.0
M45 Seven Sisters 25 unknown 19:00–01:25 (marginal) 72.5° at 20:15 8.7° 1.08
NGC 7000 North America Nebula 12 unknown 19:00–20:15 (marginal) 87.3° at 13:30 85.2° 0.17
V1057 Cyg 12 unknown 19:00–20:15 (marginal) 87.3° at 13:30 85.3° 1.08
M33 Triangulum Pinwheel 21 unknown 19:00–23:25 (marginal) 79.1° at 18:05 37.2° 1.08
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-01-18"

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"}.