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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 Wednesday, 22 December 2027 · astronomical night 18:34 → 06:04 (11.51 h) · Moon 24% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:30–18:05: quality 0.2M31 18:05–18:35: quality 0.5M31 18:35–22:25: quality 1.0M31 22:25–23:55: quality 0.9M31 23:55–00:45: quality 0.8M31 00:45–01:00: quality 0.7M31 01:00–01:20: quality 0.6M31 01:20–01:35: quality 0.5M31 01:35–01:45: quality 0.4observe M31 19:45–21:25M42M42 20:10–20:15: quality 0.4M42 20:15–20:30: quality 0.5M42 20:30–20:45: quality 0.6M42 20:45–21:05: quality 0.7M42 21:05–22:15: quality 0.8M42 22:15–01:35: quality 0.9M42 01:35–02:45: quality 0.8M42 02:45–03:05: quality 0.7M42 03:05–03:20: quality 0.6M42 03:20–03:35: quality 0.5M42 03:35–03:45: quality 0.4observe M42 01:15–03:45M45M45 17:30–18:05: quality 0.1M45 18:05–18:35: quality 0.4M45 18:35–19:25: quality 0.9M45 19:25–00:45: quality 1.0M45 00:45–02:10: quality 0.9M45 02:10–02:55: quality 0.8M45 02:55–03:10: quality 0.7M45 03:10–03:20: quality 0.6M45 03:20–03:35: quality 0.5M45 03:35–03:45: quality 0.4observe M45 23:35–01:15NGC 7000NGC 7000 17:30–18:05: quality 0.2NGC 7000 18:05–18:35: quality 0.5NGC 7000 18:35–18:50: quality 1.0NGC 7000 18:50–20:15: quality 0.9NGC 7000 20:15–21:10: quality 0.8NGC 7000 21:10–21:30: quality 0.7NGC 7000 21:30–21:45: quality 0.6NGC 7000 21:45–22:05: quality 0.5NGC 7000 22:05–22:10: quality 0.4observe NGC 7000 21:25–21:55V1057 CygV1057 Cyg 17:30–18:05: quality 0.2V1057 Cyg 18:05–18:35: quality 0.5V1057 Cyg 18:35–18:50: quality 1.0V1057 Cyg 18:50–20:15: quality 0.9V1057 Cyg 20:15–21:10: quality 0.8V1057 Cyg 21:10–21:30: quality 0.7V1057 Cyg 21:30–21:45: quality 0.6V1057 Cyg 21:45–22:05: quality 0.5V1057 Cyg 22:05–22:10: quality 0.4observe V1057 Cyg 18:05–19:45M33M33 17:30–17:35: quality 0.1M33 17:35–18:05: quality 0.2M33 18:05–18:35: quality 0.5M33 18:35–22:55: quality 1.0M33 22:55–00:15: quality 0.9M33 00:15–01:05: quality 0.8M33 01:05–01:15: quality 0.7M33 01:15–01:30: quality 0.6M33 01:30–01:45: quality 0.5M33 01:45–01:55: quality 0.4observe M33 21:55–23:35scheduleV1057 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
16:50–18:05 — nothing worth pointing at — 1.25
18:05–19:45 V1057 Cyg 1.67 0.79
19:45–21:25 M31 1.67 1.0
21:25–21:55 NGC 7000 0.5 0.58
21:55–23:35 M33 1.67 0.96
23:35–01:15 M45 1.67 0.97
01:15–03:45 M42 2.5 0.73
03:45–07:50 — nothing worth pointing at — 4.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:35–01:10 (good) 89.6° at 19:00 151.5° 1.67
M42 Great Orion Nebula 89 unknown 20:40–03:10 (good) 42.9° at 23:55 121.2° 2.5
M45 Seven Sisters 100 unknown 18:35–03:15 (good) 72.5° at 22:05 153.3° 1.67
NGC 7000 North America Nebula 77 unknown 18:35–21:35 (good) 87.2° at 15:15 113.3° 0.5
V1057 Cyg 77 unknown 18:35–21:35 (good) 87.3° at 15:15 113.3° 1.67
M33 Triangulum Pinwheel 100 unknown 18:35–01:25 (good) 79.1° at 19:50 165.8° 1.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-12-22"

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"}.