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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, 21 January 2040 · astronomical night 18:59 → 06:04 (11.09 h) · Moon 58% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:55–18:30: quality 0.1M31 18:30–19:00: quality 0.3M31 19:00–21:50: quality 0.6M31 21:50–23:05: quality 0.5M31 23:05–23:30: quality 0.4M31 23:30–23:45: quality 0.3observe M31 20:15–21:30M42M42 18:30–19:00: quality 0.2M42 19:00–20:20: quality 0.5M42 20:20–00:55: quality 0.6M42 00:55–01:20: quality 0.5M42 01:20–01:45: quality 0.4observe M42 23:45–01:45M45M45 17:55–18:30: quality 0.1M45 18:30–19:00: quality 0.3M45 19:00–01:00: quality 0.6M45 01:00–01:20: quality 0.5M45 01:20–01:35: quality 0.4M45 01:35–01:40: quality 0.3M45 01:40–01:45: quality 0.4observe M45 21:30–22:45NGC 7000NGC 7000 17:55–18:30: quality 0.1NGC 7000 18:30–19:00: quality 0.3NGC 7000 19:00–19:15: quality 0.6NGC 7000 19:15–19:40: quality 0.5NGC 7000 19:40–20:05: quality 0.4NGC 7000 20:05–20:15: quality 0.3NGC 7000 06:25–06:40: quality 0.2NGC 7000 06:40–07:15: quality 0.1observe NGC 7000 18:30–19:45V1057 CygV1057 Cyg 17:55–18:30: quality 0.1V1057 Cyg 18:30–19:00: quality 0.3V1057 Cyg 19:00–19:15: quality 0.6V1057 Cyg 19:15–19:40: quality 0.5V1057 Cyg 19:40–20:05: quality 0.4V1057 Cyg 20:05–20:15: quality 0.3V1057 Cyg 06:25–06:40: quality 0.2V1057 Cyg 06:40–07:15: quality 0.1observe V1057 Cyg 19:45–20:15M33M33 17:55–18:30: quality 0.1M33 18:30–19:00: quality 0.3M33 19:00–21:30: quality 0.6M33 21:30–23:15: quality 0.5M33 23:15–23:40: quality 0.4M33 23:40–23:55: quality 0.3observe M33 22:45–23:45scheduleNGC 7000M31M45M33M4218:0020:0022:0000:0002:0004:0006:00

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
17:20–18:30 — nothing worth pointing at — 1.17
18:30–19:45 NGC 7000 1.25 0.44
19:45–20:15 V1057 Cyg 0.5 0.36
20:15–21:30 M31 1.25 0.57
21:30–22:45 M45 1.25 0.62
22:45–23:45 M33 1.0 0.45
23:45–01:45 M42 2.0 0.55
01:45–07:45 — nothing worth pointing at — 6.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 41 unknown 19:25–19:55 (good) 89.7° at 17:05 38.1° 1.25
M42 Great Orion Nebula 61 unknown 21:55–00:45 (good) 42.9° at 21:55 47.7° 2.0
M45 Seven Sisters 62 unknown 21:15–00:00 (good) 72.5° at 20:05 19.9° 1.25
NGC 7000 North America Nebula 13 unknown 19:00–19:05 (good) 87.2° at 13:20 77.5° 1.25
V1057 Cyg 13 unknown 19:00–19:05 (good) 87.3° at 13:20 77.5° 0.5
M33 Triangulum Pinwheel 40 unknown 19:00–23:50 (marginal) 79.2° at 17:55 23.3° 1.0
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2040-01-21"

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"}.