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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 Friday, 20 August 2027 · astronomical night 21:57 → 04:52 (6.92 h) · Moon 88% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 21:30–21:45: quality 0.1M31 21:45–22:00: quality 0.2M31 22:00–22:30: quality 0.4M31 22:30–23:50: quality 0.5M31 23:50–04:55: quality 0.4M31 04:55–05:35: quality 0.2M31 05:35–06:10: quality 0.1observe M31 00:30–02:05M42M42 05:15–05:25: quality 0.1M42 05:25–05:35: quality 0.2M42 05:35–06:10: quality 0.1M45M45 01:40–01:50: quality 0.2M45 01:50–02:20: quality 0.3M45 02:20–04:20: quality 0.4M45 04:20–04:55: quality 0.5M45 04:55–05:35: quality 0.2M45 05:35–06:10: quality 0.1observe M45 03:40–04:55NGC 7000NGC 7000 20:45–21:20: quality 0.1NGC 7000 21:20–21:25: quality 0.5NGC 7000 21:25–22:00: quality 0.4NGC 7000 22:00–23:05: quality 0.7NGC 7000 23:05–01:35: quality 0.6NGC 7000 01:35–04:55: quality 0.5NGC 7000 04:55–05:35: quality 0.2NGC 7000 05:35–06:10: quality 0.1observe NGC 7000 21:20–22:55V1057 CygV1057 Cyg 20:45–21:20: quality 0.1V1057 Cyg 21:20–21:25: quality 0.5V1057 Cyg 21:25–22:00: quality 0.4V1057 Cyg 22:00–23:05: quality 0.7V1057 Cyg 23:05–01:35: quality 0.6V1057 Cyg 01:35–04:55: quality 0.5V1057 Cyg 04:55–05:35: quality 0.2V1057 Cyg 05:35–06:10: quality 0.1observe V1057 Cyg 22:55–00:30M33M33 23:05–23:15: quality 0.2M33 23:15–23:50: quality 0.3M33 23:50–04:55: quality 0.4M33 04:55–05:35: quality 0.2M33 05:35–06:10: quality 0.1observe M33 02:05–03:40scheduleNGC 7000V1057 CygM31M33M4522:0000:0002:0004:0006:00

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
20:10–21:20 — nothing worth pointing at — 1.17
21:20–22:55 NGC 7000 1.58 0.55
22:55–00:30 V1057 Cyg 1.58 0.62
00:30–02:05 M31 1.58 0.43
02:05–03:40 M33 1.58 0.37
03:40–04:55 M45 1.25 0.45
04:55–06:40 — nothing worth pointing at — 1.75

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 37 unknown 22:00–04:55 (marginal) 89.6° at 04:10 34.4° 1.58
M42 Great Orion Nebula 0 unknown — 42.9° at 09:00 79.1° 0.0
M45 Seven Sisters 18 unknown 02:05–04:55 (marginal) 72.5° at 07:10 51.7° 1.25
NGC 7000 North America Nebula 70 unknown 22:00–00:10 (good) 87.3° at 00:25 57.6° 1.58
V1057 Cyg 70 unknown 22:00–00:10 (good) 87.3° at 00:25 57.6° 1.58
M33 Triangulum Pinwheel 22 unknown 23:30–04:55 (marginal) 79.1° at 05:00 28.9° 1.58

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-08-20"

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"}.