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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 Saturday, 25 December 2027 · astronomical night 18:36 → 06:06 (11.5 h) · Moon 4% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:30–18:05: quality 0.2M31 18:05–18:40: quality 0.5M31 18:40–22:15: quality 1.0M31 22:15–23:40: quality 0.9M31 23:40–00:35: quality 0.8M31 00:35–00:50: quality 0.7M31 00:50–01:05: quality 0.6M31 01:05–01:25: quality 0.5M31 01:25–01:30: quality 0.4observe M31 19:40–21:15M42M42 19:55–20:05: quality 0.4M42 20:05–20:20: quality 0.5M42 20:20–20:35: quality 0.6M42 20:35–20:50: quality 0.7M42 20:50–22:00: quality 0.8M42 22:00–01:25: quality 0.9M42 01:25–02:35: quality 0.8M42 02:35–02:50: quality 0.7M42 02:50–03:10: quality 0.6M42 03:10–03:25: quality 0.5M42 03:25–03:30: quality 0.4observe M42 00:55–03:30M45M45 17:30–18:05: quality 0.1M45 18:05–18:35: quality 0.4M45 18:35–18:40: quality 0.5M45 18:40–19:15: quality 0.9M45 19:15–00:35: quality 1.0M45 00:35–01:55: quality 0.9M45 01:55–02:45: quality 0.8M45 02:45–02:55: quality 0.7M45 02:55–03:10: quality 0.6M45 03:10–03:25: quality 0.5M45 03:25–03:30: quality 0.4observe M45 23:20–00:55NGC 7000NGC 7000 17:30–17:55: quality 0.2NGC 7000 17:55–18:05: quality 0.1NGC 7000 18:05–18:40: quality 0.5NGC 7000 18:40–20:05: quality 0.9NGC 7000 20:05–21:00: quality 0.8NGC 7000 21:00–21:15: quality 0.7NGC 7000 21:15–21:35: quality 0.6NGC 7000 21:35–21:50: quality 0.5NGC 7000 21:50–22:00: quality 0.4observe NGC 7000 21:15–21:45V1057 CygV1057 Cyg 17:30–17:55: quality 0.2V1057 Cyg 17:55–18:05: quality 0.1V1057 Cyg 18:05–18:40: quality 0.5V1057 Cyg 18:40–20:05: quality 0.9V1057 Cyg 20:05–21:00: quality 0.8V1057 Cyg 21:00–21:15: quality 0.7V1057 Cyg 21:15–21:35: quality 0.6V1057 Cyg 21:35–21:50: quality 0.5V1057 Cyg 21:50–22:00: quality 0.4observe V1057 Cyg 18:05–19:40M33M33 17:30–18:05: quality 0.2M33 18:05–18:40: quality 0.5M33 18:40–22:45: quality 1.0M33 22:45–00:05: quality 0.9M33 00:05–00:50: quality 0.8M33 00:50–01:05: quality 0.7M33 01:05–01:20: quality 0.6M33 01:20–01:35: quality 0.5M33 01:35–01:40: quality 0.4observe M33 21:45–23:20scheduleV1057 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
16:55–18:05 — nothing worth pointing at — 1.17
18:05–19:40 V1057 Cyg 1.58 0.75
19:40–21:15 M31 1.58 1.0
21:15–21:45 NGC 7000 0.5 0.57
21:45–23:20 M33 1.58 0.96
23:20–00:55 M45 1.58 0.98
00:55–03:30 M42 2.58 0.74
03:30–07:50 — nothing worth pointing at — 4.33

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:40–01:00 (good) 89.7° at 18:50 129.6° 1.58
M42 Great Orion Nebula 89 unknown 20:25–03:00 (good) 42.9° at 23:40 145.6° 2.58
M45 Seven Sisters 100 unknown 18:40–03:05 (good) 72.5° at 21:55 167.8° 1.58
NGC 7000 North America Nebula 70 unknown 18:40–21:25 (good) 87.3° at 15:05 92.0° 0.5
V1057 Cyg 70 unknown 18:40–21:25 (good) 87.3° at 15:05 92.0° 1.58
M33 Triangulum Pinwheel 100 unknown 18:40–01:15 (good) 79.1° at 19:40 139.2° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-12-25"

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"}.