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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, 26 December 2027 · astronomical night 18:36 → 06:06 (11.5 h) · Moon 1% (new moon) · 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 18:40–22:10: quality 1.0M31 22:10–23:35: quality 0.9M31 23:35–00:30: quality 0.8M31 00:30–00:45: quality 0.7M31 00:45–01:00: quality 0.6M31 01:00–01:20: quality 0.5M31 01:20–01:25: quality 0.4observe M31 19:40–21:15M42M42 19:50–20:00: quality 0.4M42 20:00–20:15: quality 0.5M42 20:15–20:30: quality 0.6M42 20:30–20:50: quality 0.7M42 20:50–22:00: quality 0.8M42 22:00–01:20: quality 0.9M42 01:20–02:30: quality 0.8M42 02:30–02:50: quality 0.7M42 02:50–03:05: quality 0.6M42 03:05–03:20: quality 0.5M42 03:20–03:25: quality 0.4observe M42 00:55–03:25M45M45 17:30–18:05: quality 0.1M45 18:05–18:30: quality 0.4M45 18:30–18:40: quality 0.5M45 18:40–19:10: quality 0.9M45 19:10–00:30: quality 1.0M45 00:30–01:50: quality 0.9M45 01:50–02:40: quality 0.8M45 02:40–02:55: quality 0.7M45 02:55–03:05: quality 0.6M45 03:05–03:20: quality 0.5M45 03:20–03:25: quality 0.4observe M45 23:20–00:55NGC 7000NGC 7000 17:30–17:50: quality 0.2NGC 7000 17:50–18:05: quality 0.1NGC 7000 18:05–18:40: quality 0.5NGC 7000 18:40–20:00: quality 0.9NGC 7000 20:00–20:55: quality 0.8NGC 7000 20:55–21:15: quality 0.7NGC 7000 21:15–21:30: quality 0.6NGC 7000 21:30–21:50: quality 0.5NGC 7000 21:50–21:55: quality 0.4observe NGC 7000 21:15–21:45V1057 CygV1057 Cyg 17:30–17:50: quality 0.2V1057 Cyg 17:50–18:05: quality 0.1V1057 Cyg 18:05–18:40: quality 0.5V1057 Cyg 18:40–20:00: quality 0.9V1057 Cyg 20:00–20:55: quality 0.8V1057 Cyg 20:55–21:15: quality 0.7V1057 Cyg 21:15–21:30: quality 0.6V1057 Cyg 21:30–21:45: quality 0.5V1057 Cyg 21:45–21:55: quality 0.4observe V1057 Cyg 18:05–19:40M33M33 17:30–18:05: quality 0.2M33 18:05–18:40: quality 0.5M33 18:40–22:40: quality 1.0M33 22:40–00:00: quality 0.9M33 00:00–00:50: quality 0.8M33 00:50–01:00: quality 0.7M33 01:00–01:15: quality 0.6M33 01:15–01:30: quality 0.5M33 01:30–01:40: 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 0.55
21:45–23:20 M33 1.58 0.96
23:20–00:55 M45 1.58 0.97
00:55–03:25 M42 2.5 0.74
03:25–07:50 — nothing worth pointing at — 4.42

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:40–00:55 (good) 89.7° at 18:45 119.3° 1.58
M42 Great Orion Nebula 89 unknown 20:25–02:55 (good) 42.9° at 23:35 148.1° 2.5
M45 Seven Sisters 100 unknown 18:40–03:00 (good) 72.5° at 21:50 155.2° 1.58
NGC 7000 North America Nebula 68 unknown 18:40–21:20 (good) 87.2° at 15:00 84.7° 0.5
V1057 Cyg 68 unknown 18:40–21:20 (good) 87.3° at 15:00 84.7° 1.58
M33 Triangulum Pinwheel 100 unknown 18:40–01:10 (good) 79.1° at 19:35 127.4° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-12-26"

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"}.