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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, 31 December 2025 · astronomical night 18:40 → 06:08 (11.46 h) · Moon 91% (waxing gibbous) · weather: ERA5 history

M31M31 17:35–18:10: quality 0.1M31 18:10–18:45: quality 0.2M31 18:45–19:00: quality 0.4M31 19:00–20:00: quality 0.3M31 20:00–21:00: quality 0.1M31 00:00–00:20: quality 0.3M31 00:20–01:05: quality 0.2observe M31 19:50–20:00M42M42 19:30–19:55: quality 0.1M42 19:55–20:00: quality 0.2M42 20:00–21:00: quality 0.1M42 00:00–01:10: quality 0.3M42 01:10–02:00: quality 0.4M42 02:00–02:45: quality 0.2M42 02:45–03:05: quality 0.1observe M42 01:00–01:35M45M45 17:35–18:00: quality 0.1M45 18:10–18:45: quality 0.2M45 18:45–19:00: quality 0.3M45 19:00–20:00: quality 0.2M45 20:00–21:00: quality 0.1M45 00:00–02:00: quality 0.3M45 02:00–02:40: quality 0.2M45 02:40–03:05: quality 0.1observe M45 01:35–02:00NGC 7000NGC 7000 17:35–18:10: quality 0.1NGC 7000 18:10–18:45: quality 0.3NGC 7000 18:45–19:00: quality 0.6NGC 7000 19:00–20:00: quality 0.4NGC 7000 20:00–20:50: quality 0.2NGC 7000 20:50–21:00: quality 0.1observe NGC 7000 19:15–19:50V1057 CygV1057 Cyg 17:35–18:10: quality 0.1V1057 Cyg 18:10–18:45: quality 0.3V1057 Cyg 18:45–19:00: quality 0.6V1057 Cyg 19:00–20:00: quality 0.4V1057 Cyg 20:00–20:50: quality 0.2V1057 Cyg 20:50–21:00: quality 0.1observe V1057 Cyg 18:10–18:25observe V1057 Cyg 18:45–19:15M33M33 17:35–18:10: quality 0.1M33 18:10–18:45: quality 0.2M33 18:45–19:00: quality 0.4M33 19:00–20:00: quality 0.3M33 20:00–21:00: quality 0.1M33 00:00–00:20: quality 0.3M33 00:20–01:15: quality 0.2schedule18:0020:0022:0000:0002:0004:0006:00

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
17:00–18:10 — nothing worth pointing at — 1.17
18:10–18:25 V1057 Cyg 0.25 0.3
18:25–18:45 — nothing worth pointing at — 0.33
18:45–19:15 V1057 Cyg 0.5 0.5
19:15–19:50 NGC 7000 0.58 0.41
19:50–20:00 M31 0.17 0.3
20:00–01:00 — nothing worth pointing at — 5.0
01:00–01:35 M42 0.58 0.35
01:35–02:00 M45 0.42 0.33
02:00–07:50 — nothing worth pointing at — 5.83

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 27 11 18:45–20:00 (marginal) 89.6° at 18:25 45.2° 0.17
M42 Great Orion Nebula 20 9 01:00–02:00 (marginal) 42.9° at 23:15 37.6° 0.58
M45 Seven Sisters 23 11 01:00–02:00 (marginal) 72.5° at 21:25 6.0° 0.42
NGC 7000 North America Nebula 24 14 18:45–20:00 (marginal) 87.3° at 14:40 83.7° 0.58
V1057 Cyg 24 14 18:45–20:00 (marginal) 87.3° at 14:40 83.8° 0.75
M33 Triangulum Pinwheel 20 8 18:45–19:00 (marginal) 79.1° at 19:15 34.7° 0.0

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-12-31"

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"}.