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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 Thursday, 17 January 2030 · astronomical night 18:55 → 06:06 (11.18 h) · Moon 97% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:50–18:25: quality 0.1M31 18:25–19:00: quality 0.3M31 19:00–20:35: quality 0.6M31 20:35–22:30: quality 0.5M31 22:30–23:20: quality 0.4M31 23:20–23:50: quality 0.3M31 23:50–00:00: quality 0.2observe M31 20:30–21:35M42M42 18:25–19:00: quality 0.1M42 19:00–19:05: quality 0.2M42 19:05–21:05: quality 0.3M42 21:05–01:50: quality 0.2M42 01:50–02:00: quality 0.1M45M45 17:50–18:25: quality 0.1M45 18:25–19:00: quality 0.2M45 19:00–20:35: quality 0.4M45 20:35–01:15: quality 0.3M45 01:15–02:00: quality 0.2NGC 7000NGC 7000 17:50–18:25: quality 0.1NGC 7000 18:25–19:00: quality 0.3NGC 7000 19:00–19:05: quality 0.7NGC 7000 19:05–19:35: quality 0.6NGC 7000 19:35–19:55: quality 0.5NGC 7000 19:55–20:20: quality 0.4NGC 7000 20:20–20:30: quality 0.3NGC 7000 06:40–07:15: quality 0.1observe NGC 7000 18:25–19:30V1057 CygV1057 Cyg 17:50–18:25: quality 0.1V1057 Cyg 18:25–19:00: quality 0.3V1057 Cyg 19:00–19:05: quality 0.7V1057 Cyg 19:05–19:35: quality 0.6V1057 Cyg 19:35–19:55: quality 0.5V1057 Cyg 19:55–20:20: quality 0.4V1057 Cyg 20:20–20:30: quality 0.3V1057 Cyg 06:40–07:15: quality 0.1observe V1057 Cyg 19:30–20:30M33M33 17:50–18:25: quality 0.1M33 18:25–19:00: quality 0.3M33 19:00–19:50: quality 0.6M33 19:50–21:50: quality 0.5M33 21:50–23:25: quality 0.4M33 23:25–23:55: quality 0.3M33 23:55–00:10: quality 0.2observe M33 21:35–23:40scheduleNGC 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
17:15–18:25 — nothing worth pointing at — 1.17
18:25–19:30 NGC 7000 1.08 0.47
19:30–20:30 V1057 Cyg 1.0 0.44
20:30–21:35 M31 1.08 0.52
21:35–23:40 M33 2.08 0.41
23:40–07:45 — nothing worth pointing at — 8.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 41 unknown 19:00–19:40 (good) 89.5° at 17:15 73.9° 1.08
M42 Great Orion Nebula 12 unknown — 42.9° at 22:10 30.9° 0.0
M45 Seven Sisters 24 unknown 19:00–22:35 (marginal) 72.5° at 20:20 38.2° 0.0
NGC 7000 North America Nebula 17 unknown 19:00–19:25 (good) 87.2° at 13:35 105.7° 1.08
V1057 Cyg 17 unknown 19:00–19:25 (good) 87.3° at 13:35 105.7° 1.0
M33 Triangulum Pinwheel 37 unknown 19:00–23:40 (marginal) 79.1° at 18:10 66.4° 2.08

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2030-01-17"

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"}.