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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, 10 December 2027 · astronomical night 18:30 → 05:57 (11.45 h) · Moon 90% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:25–18:00: quality 0.1M31 18:00–18:35: quality 0.2M31 18:35–19:25: quality 0.4M31 19:25–02:05: quality 0.3M31 02:05–02:30: quality 0.2observe M31 21:30–23:15M42M42 20:55–21:20: quality 0.2M42 21:20–22:05: quality 0.3M42 22:05–01:05: quality 0.4M42 01:05–03:40: quality 0.5M42 03:40–04:10: quality 0.4M42 04:10–04:30: quality 0.3observe M42 23:15–01:00observe M42 04:15–04:25M45M45 18:00–18:05: quality 0.1M45 18:05–18:35: quality 0.2M45 18:35–00:05: quality 0.3M45 00:05–04:00: quality 0.4M45 04:00–04:25: quality 0.3M45 04:25–04:30: quality 0.2observe M45 02:00–04:15NGC 7000NGC 7000 17:25–18:00: quality 0.1NGC 7000 18:00–18:35: quality 0.3NGC 7000 18:35–19:40: quality 0.6NGC 7000 19:40–21:50: quality 0.5NGC 7000 21:50–22:20: quality 0.4NGC 7000 22:20–22:55: quality 0.3NGC 7000 22:55–23:00: quality 0.2observe NGC 7000 18:00–19:45V1057 CygV1057 Cyg 17:25–18:00: quality 0.1V1057 Cyg 18:00–18:35: quality 0.3V1057 Cyg 18:35–19:40: quality 0.6V1057 Cyg 19:40–21:50: quality 0.5V1057 Cyg 21:50–22:20: quality 0.4V1057 Cyg 22:20–22:50: quality 0.3V1057 Cyg 22:50–23:00: quality 0.2observe V1057 Cyg 19:45–21:30M33M33 17:25–18:00: quality 0.1M33 18:00–18:35: quality 0.2M33 18:35–19:10: quality 0.4M33 19:10–02:20: quality 0.3M33 02:20–02:40: quality 0.2observe M33 01:00–02:00scheduleNGC 7000V1057 CygM31M42M33M4518:0020:0022:0000:0002:0004:0006:00

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
16:50–18:00 — nothing worth pointing at — 1.17
18:00–19:45 NGC 7000 1.75 0.49
19:45–21:30 V1057 Cyg 1.75 0.5
21:30–23:15 M31 1.75 0.32
23:15–01:00 M42 1.75 0.42
01:00–02:00 M33 1.0 0.33
02:00–04:15 M45 2.25 0.41
04:15–04:25 M42 0.17 0.31
04:25–07:40 — nothing worth pointing at — 3.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 26 unknown 18:35–01:45 (marginal) 89.6° at 19:50 31.6° 1.75
M42 Great Orion Nebula 38 unknown 21:40–04:25 (marginal) 42.9° at 00:40 51.1° 1.92
M45 Seven Sisters 38 unknown 18:35–04:15 (marginal) 72.5° at 22:50 16.7° 2.25
NGC 7000 North America Nebula 35 unknown 18:35–18:50 (good) 87.3° at 16:05 71.8° 1.75
V1057 Cyg 35 unknown 18:35–18:50 (good) 87.3° at 16:05 71.8° 1.75
M33 Triangulum Pinwheel 25 unknown 18:35–02:00 (marginal) 79.1° at 20:40 17.2° 1.0
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-12-10"

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"}.