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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, 09 December 2027 · astronomical night 18:30 → 05:56 (11.44 h) · Moon 83% (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 18:35–01:55: quality 0.4M31 01:55–02:30: quality 0.3M31 02:30–02:35: quality 0.2observe M31 01:20–02:10M42M42 21:00–21:10: quality 0.2M42 21:10–21:35: quality 0.3M42 21:35–22:15: quality 0.4M42 22:15–00:40: quality 0.5M42 00:40–03:40: quality 0.6M42 03:40–04:00: quality 0.5M42 04:00–04:10: quality 0.6M42 04:10–04:25: quality 0.5M42 04:25–04:35: quality 0.4observe M42 21:50–23:35M45M45 18:00–18:05: quality 0.1M45 18:05–18:35: quality 0.2M45 18:35–20:15: quality 0.3M45 20:15–00:10: quality 0.4M45 00:10–03:55: quality 0.5M45 03:55–04:00: quality 0.4M45 04:00–04:15: quality 0.6M45 04:15–04:25: quality 0.5M45 04:25–04:35: quality 0.4observe M45 02:10–04:35NGC 7000NGC 7000 17:25–18:00: quality 0.1NGC 7000 18:00–18:35: quality 0.3NGC 7000 18:35–19:35: quality 0.6NGC 7000 19:35–22:00: quality 0.5NGC 7000 22:00–22:30: quality 0.4NGC 7000 22:30–23:00: quality 0.3NGC 7000 23:00–23:05: quality 0.2observe NGC 7000 18:00–18:15observe NGC 7000 18:35–20:05V1057 CygV1057 Cyg 17:25–18:00: quality 0.1V1057 Cyg 18:00–18:35: quality 0.3V1057 Cyg 18:35–19:35: quality 0.6V1057 Cyg 19:35–22:00: quality 0.5V1057 Cyg 22:00–22:30: quality 0.4V1057 Cyg 22:30–23:00: quality 0.3V1057 Cyg 23:00–23:05: quality 0.2observe V1057 Cyg 20:05–21:50M33M33 17:25–18:00: quality 0.1M33 18:00–18:35: quality 0.2M33 18:35–02:10: quality 0.4M33 02:10–02:40: quality 0.3M33 02:40–02:45: quality 0.2observe M33 23:35–01:20scheduleNGC 7000V1057 CygM42M33M31M4518:0020:0022:0000:0002:0004:0006:00

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
18:00–18:15 NGC 7000 0.25 0.3
18:15–18:35 — nothing worth pointing at — 0.33
18:35–20:05 NGC 7000 1.5 0.56
20:05–21:50 V1057 Cyg 1.75 0.49
21:50–23:35 M42 1.75 0.47
23:35–01:20 M33 1.75 0.42
01:20–02:10 M31 0.83 0.37
02:10–04:35 M45 2.42 0.51
04:35–07:40 — nothing worth pointing at — 3.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 33 unknown 18:35–02:10 (marginal) 89.5° at 19:50 28.3° 0.83
M42 Great Orion Nebula 58 unknown 04:00–04:05 (good) 42.9° at 00:45 61.3° 1.75
M45 Seven Sisters 63 unknown 04:00–04:05 (good) 72.5° at 22:55 29.9° 2.42
NGC 7000 North America Nebula 35 unknown 18:35–22:45 (marginal) 87.2° at 16:10 65.3° 1.75
V1057 Cyg 35 unknown 18:35–22:45 (marginal) 87.3° at 16:10 65.3° 1.75
M33 Triangulum Pinwheel 36 unknown 18:35–02:25 (marginal) 79.1° at 20:45 14.6° 1.75
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-12-09"

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"}.