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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 Monday, 13 December 2027 · astronomical night 18:31 → 05:59 (11.48 h) · Moon 100% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:25–18:00: quality 0.1M31 18:00–18:35: quality 0.3M31 18:35–20:00: quality 0.6M31 20:00–22:35: quality 0.5M31 22:35–01:10: quality 0.4M31 01:10–01:50: quality 0.3M31 01:50–02:20: quality 0.2observe M31 21:20–22:55M42M42 20:45–20:50: quality 0.1M42 20:50–04:10: quality 0.2M42 04:10–04:20: quality 0.1M45M45 17:40–18:00: quality 0.1M45 18:00–18:35: quality 0.2M45 18:35–20:10: quality 0.4M45 20:10–22:30: quality 0.3M45 22:30–04:10: quality 0.2M45 04:10–04:20: quality 0.1observe M45 21:10–21:20NGC 7000NGC 7000 17:25–18:00: quality 0.1NGC 7000 18:00–18:35: quality 0.4NGC 7000 18:35–19:00: quality 0.8NGC 7000 19:00–20:20: quality 0.7NGC 7000 20:20–21:40: quality 0.6NGC 7000 21:40–22:05: quality 0.5NGC 7000 22:05–22:30: quality 0.4NGC 7000 22:30–22:50: quality 0.3observe NGC 7000 18:00–19:35V1057 CygV1057 Cyg 17:25–18:00: quality 0.1V1057 Cyg 18:00–18:35: quality 0.4V1057 Cyg 18:35–19:00: quality 0.8V1057 Cyg 19:00–20:20: quality 0.7V1057 Cyg 20:20–21:40: quality 0.6V1057 Cyg 21:40–22:05: quality 0.5V1057 Cyg 22:05–22:30: quality 0.4V1057 Cyg 22:30–22:50: quality 0.3observe V1057 Cyg 19:35–21:10M33M33 17:25–18:00: quality 0.1M33 18:00–18:35: quality 0.3M33 18:35–19:05: quality 0.6M33 19:05–21:10: quality 0.5M33 21:10–23:55: quality 0.4M33 23:55–01:55: quality 0.3M33 01:55–02:30: quality 0.2observe M33 22:55–01:35scheduleNGC 7000V1057 CygM31M3318:0020:0022:0000:0002:0004:0006:00

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
18:00–19:35 NGC 7000 1.58 0.61
19:35–21:10 V1057 Cyg 1.58 0.65
21:10–21:20 M45 0.17 0.3
21:20–22:55 M31 1.58 0.47
22:55–01:35 M33 2.67 0.34
01:35–07:40 — nothing worth pointing at — 6.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 56 unknown 18:35–18:55 (good) 89.6° at 19:35 61.2° 1.58
M42 Great Orion Nebula 9 unknown — 42.9° at 00:30 31.9° 0.0
M45 Seven Sisters 26 unknown 18:35–21:20 (marginal) 72.5° at 22:40 25.3° 0.17
NGC 7000 North America Nebula 55 unknown 18:35–21:00 (good) 87.2° at 15:55 95.6° 1.58
V1057 Cyg 55 unknown 18:35–21:00 (good) 87.3° at 15:55 95.6° 1.58
M33 Triangulum Pinwheel 49 unknown 18:35–01:35 (marginal) 79.1° at 20:30 53.1° 2.67

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-12-13"

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"}.