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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, 23 December 2028 · astronomical night 18:35 → 06:05 (11.5 h) · Moon 50% (first quarter) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:30–18:05: quality 0.1M31 18:05–18:40: quality 0.3M31 18:40–00:30: quality 0.7M31 00:30–00:40: quality 0.8M31 00:40–00:55: quality 0.7M31 00:55–01:10: quality 0.6M31 01:10–01:30: quality 0.5M31 01:30–01:35: quality 0.4observe M31 00:30–01:10M42M42 20:00–20:05: quality 0.3M42 20:05–20:25: quality 0.4M42 20:25–20:40: quality 0.5M42 20:40–21:00: quality 0.6M42 21:00–22:45: quality 0.7M42 22:45–00:30: quality 0.8M42 00:30–01:30: quality 0.9M42 01:30–02:40: quality 0.8M42 02:40–02:55: quality 0.7M42 02:55–03:15: quality 0.6M42 03:15–03:30: quality 0.5M42 03:30–03:35: quality 0.4observe M42 23:05–00:30observe M42 01:40–03:35M45M45 17:30–18:05: quality 0.1M45 18:05–18:40: quality 0.3M45 18:40–20:40: quality 0.7M45 20:40–00:30: quality 0.8M45 00:30–00:40: quality 1.0M45 00:40–02:00: quality 0.9M45 02:00–02:50: quality 0.8M45 02:50–03:00: quality 0.7M45 03:00–03:15: quality 0.6M45 03:15–03:30: quality 0.5M45 03:30–03:35: quality 0.4observe M45 21:25–23:05NGC 7000NGC 7000 17:30–18:05: quality 0.1NGC 7000 18:05–18:25: quality 0.4NGC 7000 18:25–18:40: quality 0.3NGC 7000 18:40–19:35: quality 0.7NGC 7000 19:35–21:10: quality 0.6NGC 7000 21:10–21:30: quality 0.5NGC 7000 21:30–21:55: quality 0.4NGC 7000 21:55–22:05: quality 0.3observe NGC 7000 18:05–19:45V1057 CygV1057 Cyg 17:30–18:05: quality 0.1V1057 Cyg 18:05–18:25: quality 0.4V1057 Cyg 18:25–18:40: quality 0.3V1057 Cyg 18:40–19:30: quality 0.7V1057 Cyg 19:30–21:10: quality 0.6V1057 Cyg 21:10–21:30: quality 0.5V1057 Cyg 21:30–21:55: quality 0.4V1057 Cyg 21:55–22:05: quality 0.3observe V1057 Cyg 19:45–21:25M33M33 17:30–18:05: quality 0.1M33 18:05–18:40: quality 0.3M33 18:40–00:30: quality 0.7M33 00:30–00:55: quality 0.8M33 00:55–01:10: quality 0.7M33 01:10–01:25: quality 0.6M33 01:25–01:40: quality 0.5M33 01:40–01:45: quality 0.4observe M33 01:10–01:40scheduleNGC 7000V1057 CygM45M42M4218:0020:0022:0000:0002:0004:0006:00

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 NGC 7000 1.67 0.55
19:45–21:25 V1057 Cyg 1.67 0.6
21:25–23:05 M45 1.67 0.78
23:05–00:30 M42 1.42 0.78
00:30–01:10 M31 0.67 0.68
01:10–01:40 M33 0.5 0.55
01:40–03:35 M42 1.92 0.7
03:35–07:50 — nothing worth pointing at — 4.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 79 unknown 18:40–01:05 (good) 89.7° at 18:55 36.5° 0.67
M42 Great Orion Nebula 88 unknown 20:50–03:05 (good) 42.9° at 23:45 83.9° 3.33
M45 Seven Sisters 96 unknown 18:40–03:10 (good) 72.5° at 22:00 56.7° 1.67
NGC 7000 North America Nebula 39 unknown 18:40–21:00 (good) 87.2° at 15:10 55.5° 1.67
V1057 Cyg 39 unknown 18:40–20:55 (good) 87.3° at 15:10 55.4° 1.67
M33 Triangulum Pinwheel 82 unknown 18:40–01:20 (good) 79.1° at 19:45 32.8° 0.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2028-12-23"

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"}.