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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 Monday, 29 September 2031 · astronomical night 20:39 → 05:43 (9.07 h) · Moon 99% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:35–20:10: quality 0.1M31 20:10–20:40: quality 0.2M31 20:40–03:25: quality 0.4M31 03:25–05:45: quality 0.5M31 05:45–06:20: quality 0.3M31 06:20–06:50: quality 0.1observe M31 01:40–03:20M42M42 02:40–02:55: quality 0.3M42 02:55–03:15: quality 0.4M42 03:15–03:35: quality 0.5M42 03:35–04:55: quality 0.6M42 04:55–05:45: quality 0.7M42 05:45–06:00: quality 0.3M42 06:00–06:20: quality 0.4M42 06:20–06:50: quality 0.1observe M42 03:20–05:00observe M42 05:45–06:20M45M45 23:00–23:10: quality 0.2M45 23:10–23:40: quality 0.3M45 23:40–00:50: quality 0.4M45 00:50–02:40: quality 0.5M45 02:40–05:15: quality 0.6M45 05:15–05:45: quality 0.7M45 05:45–06:15: quality 0.3M45 06:15–06:20: quality 0.4M45 06:20–06:50: quality 0.1observe M45 00:00–01:40NGC 7000NGC 7000 19:35–20:10: quality 0.1NGC 7000 20:10–20:40: quality 0.3NGC 7000 20:40–20:50: quality 0.6NGC 7000 20:50–00:50: quality 0.5NGC 7000 00:50–04:00: quality 0.4NGC 7000 04:00–04:35: quality 0.3NGC 7000 04:35–04:45: quality 0.2observe NGC 7000 20:40–22:20V1057 CygV1057 Cyg 19:35–20:10: quality 0.1V1057 Cyg 20:10–20:40: quality 0.3V1057 Cyg 20:40–20:50: quality 0.6V1057 Cyg 20:50–00:50: quality 0.5V1057 Cyg 00:50–04:00: quality 0.4V1057 Cyg 04:00–04:35: quality 0.3V1057 Cyg 04:35–04:45: quality 0.2observe V1057 Cyg 22:20–00:00M33M33 20:25–20:40: quality 0.1M33 20:40–20:45: quality 0.2M33 20:45–21:20: quality 0.3M33 21:20–03:35: quality 0.4M33 03:35–05:45: quality 0.5M33 05:45–06:20: quality 0.3M33 06:20–06:50: quality 0.1observe M33 05:00–05:45scheduleNGC 7000V1057 CygM45M31M42M3320:0022:0000:0002:0004:0006:00

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
19:05–20:40 — nothing worth pointing at — 1.58
20:40–22:20 NGC 7000 1.67 0.52
22:20–00:00 V1057 Cyg 1.67 0.47
00:00–01:40 M45 1.67 0.45
01:40–03:20 M31 1.67 0.42
03:20–05:00 M42 1.67 0.6
05:00–05:45 M33 0.75 0.53
05:45–06:20 M42 0.58 0.35
06:20–07:20 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 52 unknown 20:40–05:45 (marginal) 89.6° at 01:30 42.1° 1.67
M42 Great Orion Nebula 35 unknown 04:05–05:45 (good) 42.9° at 06:25 90.1° 2.25
M45 Seven Sisters 63 unknown 04:05–05:45 (good) 72.5° at 04:35 64.4° 1.67
NGC 7000 North America Nebula 52 unknown 20:40–04:20 (marginal) 87.2° at 21:50 54.7° 1.67
V1057 Cyg 52 unknown 20:40–04:20 (marginal) 87.3° at 21:50 54.7° 1.67
M33 Triangulum Pinwheel 51 unknown 21:00–05:45 (marginal) 79.1° at 02:25 40.1° 0.75
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-09-29"

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"}.