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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, 31 July 2027 · astronomical night 22:34 → 04:21 (5.78 h) · Moon 3% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 22:50–23:00: quality 0.4M31 23:00–23:15: quality 0.5M31 23:15–23:30: quality 0.6M31 23:30–23:50: quality 0.7M31 23:50–00:40: quality 0.8M31 00:40–02:05: quality 0.9M31 02:05–04:25: quality 1.0M31 04:25–05:05: quality 0.5M31 05:05–05:45: quality 0.1observe M31 00:55–02:25M42M45M45 02:55–03:05: quality 0.4M45 03:05–03:20: quality 0.5M45 03:20–03:30: quality 0.6M45 03:30–03:45: quality 0.7M45 03:45–04:25: quality 0.8M45 04:25–05:05: quality 0.4M45 05:05–05:45: quality 0.1observe M45 03:55–05:05NGC 7000NGC 7000 21:15–21:55: quality 0.1NGC 7000 21:55–22:35: quality 0.5NGC 7000 22:35–04:25: quality 1.0NGC 7000 04:25–05:05: quality 0.5NGC 7000 05:05–05:45: quality 0.1observe NGC 7000 21:55–23:25V1057 CygV1057 Cyg 21:15–21:55: quality 0.1V1057 Cyg 21:55–22:35: quality 0.5V1057 Cyg 22:35–04:25: quality 1.0V1057 Cyg 04:25–05:05: quality 0.5V1057 Cyg 05:05–05:45: quality 0.1observe V1057 Cyg 23:25–00:55M33M33 00:20–00:30: quality 0.4M33 00:30–00:45: quality 0.5M33 00:45–01:00: quality 0.6M33 01:00–01:10: quality 0.7M33 01:10–02:00: quality 0.8M33 02:00–03:20: quality 0.9M33 03:20–04:25: quality 1.0M33 04:25–05:05: quality 0.5M33 05:05–05:45: quality 0.1observe M33 02:25–03:55scheduleNGC 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
20:40–21:55 — nothing worth pointing at — 1.25
21:55–23:25 NGC 7000 1.5 0.76
23:25–00:55 V1057 Cyg 1.5 1.0
00:55–02:25 M31 1.5 0.92
02:25–03:55 M33 1.5 0.94
03:55–05:05 M45 1.17 0.6
05:05–06:15 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 23:25–04:25 (good) 89.5° at 05:25 80.1° 1.5
M42 Great Orion Nebula 0 unknown — 42.9° at 10:20 38.7° 0.0
M45 Seven Sisters 29 unknown 03:25–04:25 (good) 72.5° at 08:30 47.6° 1.17
NGC 7000 North America Nebula 100 unknown 22:35–04:25 (good) 87.2° at 01:45 107.4° 1.5
V1057 Cyg 100 unknown 22:35–04:25 (good) 87.3° at 01:45 107.4° 1.5
M33 Triangulum Pinwheel 96 unknown 00:50–04:25 (good) 79.1° at 06:20 74.4° 1.5

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-07-31"

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"}.