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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 Sunday, 05 December 2027 · astronomical night 18:30 → 05:53 (11.39 h) · Moon 47% (first quarter) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:25–18:00: quality 0.1M31 18:00–18:35: quality 0.4M31 18:35–23:45: quality 0.8M31 23:45–01:00: quality 0.9M31 01:00–01:55: quality 0.8M31 01:55–02:10: quality 0.7M31 02:10–02:25: quality 0.6M31 02:25–02:40: quality 0.5M31 02:40–02:50: quality 0.4observe M31 01:20–02:40M42M42 21:15–21:30: quality 0.4M42 21:30–21:45: quality 0.5M42 21:45–22:05: quality 0.6M42 22:05–22:35: quality 0.7M42 22:35–23:45: quality 0.8M42 23:45–02:45: quality 0.9M42 02:45–03:55: quality 0.8M42 03:55–04:10: quality 0.7M42 04:10–04:25: quality 0.6M42 04:25–04:40: quality 0.5M42 04:40–04:50: quality 0.4observe M42 02:40–04:50M45M45 17:40–18:00: quality 0.1M45 18:00–18:05: quality 0.2M45 18:05–18:35: quality 0.3M45 18:35–19:55: quality 0.7M45 19:55–21:15: quality 0.8M45 21:15–23:45: quality 0.9M45 23:45–01:55: quality 1.0M45 01:55–03:15: quality 0.9M45 03:15–04:00: quality 0.8M45 04:00–04:15: quality 0.7M45 04:15–04:30: quality 0.6M45 04:30–04:45: quality 0.5M45 04:45–04:50: quality 0.4observe M45 21:40–23:30NGC 7000NGC 7000 17:25–18:00: quality 0.1NGC 7000 18:00–18:35: quality 0.4NGC 7000 18:35–19:25: quality 0.8NGC 7000 19:25–22:10: quality 0.7NGC 7000 22:10–22:30: quality 0.6NGC 7000 22:30–22:55: quality 0.5NGC 7000 22:55–23:15: quality 0.4NGC 7000 23:15–23:20: quality 0.3observe NGC 7000 18:00–19:50V1057 CygV1057 Cyg 17:25–18:00: quality 0.1V1057 Cyg 18:00–18:35: quality 0.4V1057 Cyg 18:35–19:25: quality 0.8V1057 Cyg 19:25–22:10: quality 0.7V1057 Cyg 22:10–22:30: quality 0.6V1057 Cyg 22:30–22:55: quality 0.5V1057 Cyg 22:55–23:15: quality 0.4V1057 Cyg 23:15–23:20: quality 0.3observe V1057 Cyg 19:50–21:40M33M33 17:25–18:00: quality 0.1M33 18:00–18:35: quality 0.4M33 18:35–23:45: quality 0.8M33 23:45–00:00: quality 1.0M33 00:00–01:20: quality 0.9M33 01:20–02:10: quality 0.8M33 02:10–02:25: quality 0.7M33 02:25–02:40: quality 0.6M33 02:40–02:55: quality 0.5M33 02:55–03:00: quality 0.4observe M33 23:30–01:20scheduleNGC 7000V1057 CygM45M33M31M4218:0020:0022:0000:0002:0004:0006:00

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
18:00–19:50 NGC 7000 1.83 0.63
19:50–21:40 V1057 Cyg 1.83 0.7
21:40–23:30 M45 1.83 0.87
23:30–01:20 M33 1.83 0.9
01:20–02:40 M31 1.33 0.69
02:40–04:50 M42 2.17 0.72
04:50–07:35 — nothing worth pointing at — 2.75

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 93 unknown 18:35–02:15 (good) 89.5° at 20:10 53.7° 1.33
M42 Great Orion Nebula 89 unknown 21:55–04:20 (good) 42.9° at 01:00 102.6° 2.17
M45 Seven Sisters 100 unknown 18:35–04:20 (good) 72.5° at 23:10 79.3° 1.83
NGC 7000 North America Nebula 65 unknown 18:35–22:20 (good) 87.2° at 16:25 54.4° 1.83
V1057 Cyg 65 unknown 18:35–22:20 (good) 87.3° at 16:25 54.4° 1.83
M33 Triangulum Pinwheel 97 unknown 18:35–02:30 (good) 79.1° at 21:00 54.2° 1.83
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-12-05"

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"}.