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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, 15 December 2027 · astronomical night 18:31 → 06:01 (11.49 h) · Moon 93% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:25–18:00: quality 0.2M31 18:00–18:35: quality 0.5M31 18:35–18:55: quality 1.0M31 18:55–21:00: quality 0.8M31 21:00–23:00: quality 0.7M31 23:00–00:35: quality 0.6M31 00:35–01:20: quality 0.5M31 01:20–01:45: quality 0.4M31 01:45–02:10: quality 0.3observe M31 21:20–23:00M42M42 20:35–20:40: quality 0.2M42 20:40–21:15: quality 0.3M42 21:15–00:15: quality 0.4M42 00:15–03:25: quality 0.3M42 03:25–04:10: quality 0.2M45M45 17:25–18:00: quality 0.1M45 18:00–18:35: quality 0.4M45 18:35–18:55: quality 0.9M45 18:55–22:10: quality 0.6M45 22:10–00:45: quality 0.5M45 00:45–03:15: quality 0.4M45 03:15–03:50: quality 0.3M45 03:50–04:10: quality 0.2observe M45 00:40–03:30NGC 7000NGC 7000 17:25–18:00: quality 0.2NGC 7000 18:00–18:35: quality 0.5NGC 7000 18:35–18:55: quality 1.0NGC 7000 18:55–19:15: quality 0.9NGC 7000 19:15–20:35: quality 0.8NGC 7000 20:35–21:35: quality 0.7NGC 7000 21:35–21:55: quality 0.6NGC 7000 21:55–22:15: quality 0.5NGC 7000 22:15–22:35: quality 0.4NGC 7000 22:35–22:40: quality 0.3observe NGC 7000 18:00–19:40V1057 CygV1057 Cyg 17:25–18:00: quality 0.2V1057 Cyg 18:00–18:35: quality 0.5V1057 Cyg 18:35–18:55: quality 1.0V1057 Cyg 18:55–19:15: quality 0.9V1057 Cyg 19:15–20:35: quality 0.8V1057 Cyg 20:35–21:35: quality 0.7V1057 Cyg 21:35–21:55: quality 0.6V1057 Cyg 21:55–22:15: quality 0.5V1057 Cyg 22:15–22:35: quality 0.4V1057 Cyg 22:35–22:40: quality 0.3observe V1057 Cyg 19:40–21:20M33M33 17:25–18:00: quality 0.1M33 18:00–18:35: quality 0.5M33 18:35–18:55: quality 1.0M33 18:55–20:20: quality 0.8M33 20:20–22:55: quality 0.7M33 22:55–00:25: quality 0.6M33 00:25–01:35: quality 0.5M33 01:35–01:55: quality 0.4M33 01:55–02:20: quality 0.3observe M33 23:00–00:40scheduleNGC 7000V1057 CygM31M33M4518:0020:0022:0000:0002:0004:0006:00

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
18:00–19:40 NGC 7000 1.67 0.75
19:40–21:20 V1057 Cyg 1.67 0.75
21:20–23:00 M31 1.67 0.7
23:00–00:40 M33 1.67 0.59
00:40–03:30 M45 2.83 0.39
03:30–07:45 — nothing worth pointing at — 4.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:35–23:45 (good) 89.6° at 19:30 86.5° 1.67
M42 Great Orion Nebula 25 unknown 20:55–02:15 (marginal) 42.9° at 00:20 42.0° 0.0
M45 Seven Sisters 87 unknown 18:35–21:10 (good) 72.5° at 22:30 54.5° 2.83
NGC 7000 North America Nebula 82 unknown 18:35–21:45 (good) 87.3° at 15:45 111.5° 1.67
V1057 Cyg 82 unknown 18:35–21:45 (good) 87.3° at 15:45 111.6° 1.67
M33 Triangulum Pinwheel 100 unknown 18:35–23:40 (good) 79.1° at 20:20 81.2° 1.67

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-12-15"

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"}.