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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 Wednesday, 28 July 2027 · astronomical night 22:39 → 04:16 (5.62 h) · Moon 27% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 23:00–23:10: quality 0.4M31 23:10–23:25: quality 0.5M31 23:25–23:45: quality 0.6M31 23:45–00:00: quality 0.7M31 00:00–00:55: quality 0.8M31 00:55–01:25: quality 0.9M31 01:25–02:20: quality 0.8M31 02:20–04:20: quality 0.9M31 04:20–05:05: quality 0.4M31 05:05–05:45: quality 0.1observe M31 00:55–02:25M42M45M45 03:10–03:25: quality 0.4M45 03:25–03:45: quality 0.5M45 03:45–04:00: quality 0.6M45 04:00–04:20: quality 0.7M45 04:20–04:30: quality 0.3M45 04:30–05:05: quality 0.4M45 05:05–05:45: quality 0.1observe M45 03:55–05:05NGC 7000NGC 7000 21:20–21:55: quality 0.1NGC 7000 21:55–22:40: quality 0.5NGC 7000 22:40–01:25: quality 1.0NGC 7000 01:25–04:20: quality 0.9NGC 7000 04:20–04:55: quality 0.5NGC 7000 04:55–05:05: quality 0.4NGC 7000 05:05–05:45: quality 0.1observe NGC 7000 21:55–23:25V1057 CygV1057 Cyg 21:20–21:55: quality 0.1V1057 Cyg 21:55–22:40: quality 0.5V1057 Cyg 22:40–01:25: quality 1.0V1057 Cyg 01:25–04:20: quality 0.9V1057 Cyg 04:20–04:55: quality 0.5V1057 Cyg 04:55–05:05: quality 0.4V1057 Cyg 05:05–05:45: quality 0.1observe V1057 Cyg 23:25–00:55M33M33 00:35–00:40: quality 0.4M33 00:40–00:55: quality 0.5M33 00:55–01:10: quality 0.6M33 01:10–02:10: quality 0.7M33 02:10–04:20: quality 0.8M33 04:20–05:05: quality 0.4M33 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 0.73
23:25–00:55 V1057 Cyg 1.5 1.0
00:55–02:25 M31 1.5 0.84
02:25–03:55 M33 1.5 0.8
03:55–05:05 M45 1.17 0.47
05:05–06:15 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 88 unknown 23:35–04:20 (good) 89.7° at 05:40 43.8° 1.5
M42 Great Orion Nebula 0 unknown — 42.9° at 10:30 38.4° 0.0
M45 Seven Sisters 17 unknown 03:50–04:20 (good) 72.5° at 08:40 4.0° 1.17
NGC 7000 North America Nebula 100 unknown 22:40–04:20 (good) 87.3° at 01:55 82.7° 1.5
V1057 Cyg 100 unknown 22:40–04:20 (good) 87.3° at 01:55 82.7° 1.5
M33 Triangulum Pinwheel 67 unknown 01:05–04:20 (good) 79.1° at 06:30 33.0° 1.5

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-07-28"

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"}.