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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 Sunday, 19 September 2027 · astronomical night 20:57 → 05:32 (8.57 h) · Moon 84% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:55–20:25: quality 0.1M31 20:25–20:45: quality 0.4M31 20:45–21:00: quality 0.3M31 21:00–00:35: quality 0.5M31 00:35–05:35: quality 0.4M31 05:35–06:10: quality 0.2M31 06:10–06:40: quality 0.1observe M31 23:35–01:10M42M42 03:15–03:35: quality 0.2M42 03:35–04:10: quality 0.3M42 04:10–05:35: quality 0.4M42 05:35–06:10: quality 0.2M42 06:10–06:40: quality 0.1observe M42 04:20–05:35M45M45 23:40–00:00: quality 0.2M45 00:00–00:35: quality 0.3M45 00:35–01:10: quality 0.4M45 01:10–02:55: quality 0.3M45 02:55–03:35: quality 0.4M45 03:35–04:50: quality 0.3M45 04:50–05:35: quality 0.4M45 05:35–06:10: quality 0.2M45 06:10–06:40: quality 0.1observe M45 02:45–04:20NGC 7000NGC 7000 19:55–20:25: quality 0.2NGC 7000 20:25–20:45: quality 0.5NGC 7000 20:45–21:00: quality 0.4NGC 7000 21:00–21:45: quality 0.8NGC 7000 21:45–00:35: quality 0.7NGC 7000 00:35–02:30: quality 0.6NGC 7000 02:30–04:20: quality 0.5NGC 7000 04:20–04:50: quality 0.4NGC 7000 04:50–05:20: quality 0.3observe NGC 7000 20:25–22:00V1057 CygV1057 Cyg 19:55–20:25: quality 0.2V1057 Cyg 20:25–20:45: quality 0.5V1057 Cyg 20:45–21:00: quality 0.4V1057 Cyg 21:00–21:45: quality 0.8V1057 Cyg 21:45–00:35: quality 0.7V1057 Cyg 00:35–02:30: quality 0.6V1057 Cyg 02:30–04:20: quality 0.5V1057 Cyg 04:20–04:50: quality 0.4V1057 Cyg 04:50–05:20: quality 0.3observe V1057 Cyg 22:00–23:35M33M33 21:05–21:30: quality 0.3M33 21:30–21:55: quality 0.4M33 21:55–23:40: quality 0.5M33 23:40–03:35: quality 0.4M33 03:35–04:50: quality 0.3M33 04:50–05:35: quality 0.4M33 05:35–06:10: quality 0.2M33 06:10–06:40: quality 0.1observe M33 01:10–02:45scheduleNGC 7000V1057 CygM31M33M45M4220:0022:0000:0002:0004:0006:00

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
19:20–20:25 — nothing worth pointing at — 1.08
20:25–22:00 NGC 7000 1.58 0.65
22:00–23:35 V1057 Cyg 1.58 0.71
23:35–01:10 M31 1.58 0.46
01:10–02:45 M33 1.58 0.39
02:45–04:20 M45 1.58 0.35
04:20–05:35 M42 1.25 0.39
05:35–07:10 — nothing worth pointing at — 1.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 54 unknown 21:00–05:35 (marginal) 89.7° at 02:10 31.6° 1.58
M42 Great Orion Nebula 10 unknown 03:55–05:35 (marginal) 42.9° at 07:00 51.2° 1.25
M45 Seven Sisters 19 unknown 00:15–05:35 (marginal) 72.5° at 05:15 16.7° 1.58
NGC 7000 North America Nebula 78 unknown 21:00–01:40 (good) 87.2° at 22:25 71.7° 1.58
V1057 Cyg 78 unknown 21:00–01:40 (good) 87.3° at 22:25 71.7° 1.58
M33 Triangulum Pinwheel 41 unknown 21:15–05:35 (marginal) 79.1° at 03:00 17.2° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-09-19"

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"}.