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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, 18 January 2040 · astronomical night 18:56 → 06:06 (11.17 h) · Moon 28% (waxing crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:50–18:25: quality 0.1M31 18:25–19:00: quality 0.4M31 19:00–19:10: quality 0.8M31 19:10–20:10: quality 0.9M31 20:10–22:20: quality 0.8M31 22:20–22:25: quality 0.7M31 22:25–23:00: quality 0.8M31 23:00–23:15: quality 0.7M31 23:15–23:30: quality 0.6M31 23:30–23:50: quality 0.5M31 23:50–23:55: quality 0.4observe M31 22:45–23:50M42M42 18:20–18:25: quality 0.1M42 18:25–18:45: quality 0.2M42 18:45–19:00: quality 0.3M42 19:00–19:10: quality 0.6M42 19:10–19:55: quality 0.7M42 19:55–22:25: quality 0.8M42 22:25–23:50: quality 0.9M42 23:50–01:00: quality 0.8M42 01:00–01:20: quality 0.7M42 01:20–01:35: quality 0.6M42 01:35–01:50: quality 0.5M42 01:50–01:55: quality 0.4observe M42 23:50–01:55M45M45 17:50–18:25: quality 0.1M45 18:25–19:00: quality 0.4M45 19:00–22:25: quality 0.9M45 22:25–23:00: quality 1.0M45 23:00–00:20: quality 0.9M45 00:20–01:10: quality 0.8M45 01:10–01:25: quality 0.7M45 01:25–01:35: quality 0.6M45 01:35–01:50: quality 0.5M45 01:50–01:55: quality 0.4observe M45 21:30–22:45NGC 7000NGC 7000 17:50–18:25: quality 0.1NGC 7000 18:25–19:00: quality 0.4NGC 7000 19:00–19:30: quality 0.7NGC 7000 19:30–19:50: quality 0.6NGC 7000 19:50–20:10: quality 0.5NGC 7000 20:10–20:25: quality 0.4NGC 7000 06:35–06:40: quality 0.2NGC 7000 06:40–07:15: quality 0.1observe NGC 7000 18:25–19:40V1057 CygV1057 Cyg 17:50–18:25: quality 0.1V1057 Cyg 18:25–19:00: quality 0.4V1057 Cyg 19:00–19:30: quality 0.7V1057 Cyg 19:30–19:50: quality 0.6V1057 Cyg 19:50–20:10: quality 0.5V1057 Cyg 20:10–20:25: quality 0.4V1057 Cyg 06:40–07:15: quality 0.1observe V1057 Cyg 19:40–20:15M33M33 17:50–18:25: quality 0.1M33 18:25–19:00: quality 0.4M33 19:00–19:55: quality 0.8M33 19:55–20:40: quality 0.9M33 20:40–22:25: quality 0.8M33 22:25–22:30: quality 0.9M33 22:30–23:20: quality 0.8M33 23:20–23:30: quality 0.7M33 23:30–23:45: quality 0.6M33 23:45–00:00: quality 0.5M33 00:00–00:10: quality 0.4observe M33 20:15–21:30scheduleNGC 7000M33M45M31M4218:0020:0022:0000:0002:0004:0006:00

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
17:15–18:25 — nothing worth pointing at — 1.17
18:25–19:40 NGC 7000 1.25 0.53
19:40–20:15 V1057 Cyg 0.58 0.5
20:15–21:30 M33 1.25 0.84
21:30–22:45 M45 1.25 0.93
22:45–23:50 M31 1.08 0.64
23:50–01:55 M42 2.08 0.72
01:55–07:45 — nothing worth pointing at — 5.83

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 86 unknown 19:00–23:25 (good) 89.8° at 17:15 44.9° 1.08
M42 Great Orion Nebula 89 unknown 19:05–01:25 (good) 42.9° at 22:05 79.1° 2.08
M45 Seven Sisters 99 unknown 19:00–01:30 (good) 72.5° at 20:20 57.6° 1.25
NGC 7000 North America Nebula 21 unknown 19:00–19:40 (good) 87.2° at 13:30 65.1° 1.25
V1057 Cyg 20 unknown 19:00–19:40 (good) 87.3° at 13:30 65.1° 0.58
M33 Triangulum Pinwheel 86 unknown 19:00–23:40 (good) 79.2° at 18:05 38.5° 1.25
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2040-01-18"

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"}.