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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 Tuesday, 20 July 2027 · astronomical night 22:51 → 04:04 (5.21 h) · Moon 95% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 23:35–23:55: quality 0.3M31 23:55–00:20: quality 0.4M31 00:20–02:00: quality 0.5M31 02:00–04:05: quality 0.6M31 04:05–04:55: quality 0.3M31 04:55–05:35: quality 0.1observe M31 00:55–02:20observe M31 04:05–04:35M42M45M45 03:40–03:50: quality 0.3M45 03:50–04:05: quality 0.4M45 04:05–04:15: quality 0.2M45 04:15–04:55: quality 0.3M45 04:55–05:35: quality 0.1observe M45 03:45–04:05observe M45 04:35–04:55NGC 7000NGC 7000 21:25–22:05: quality 0.1NGC 7000 22:05–22:55: quality 0.3NGC 7000 22:55–02:55: quality 0.6NGC 7000 02:55–03:35: quality 0.5NGC 7000 03:35–04:05: quality 0.6NGC 7000 04:05–04:55: quality 0.3NGC 7000 04:55–05:35: quality 0.1observe NGC 7000 22:05–23:30V1057 CygV1057 Cyg 21:25–22:05: quality 0.1V1057 Cyg 22:05–22:55: quality 0.3V1057 Cyg 22:55–02:50: quality 0.6V1057 Cyg 02:50–03:40: quality 0.5V1057 Cyg 03:40–04:05: quality 0.6V1057 Cyg 04:05–04:55: quality 0.3V1057 Cyg 04:55–05:35: quality 0.1observe V1057 Cyg 23:30–00:55M33M33 01:05–01:25: quality 0.3M33 01:25–01:50: quality 0.4M33 01:50–03:15: quality 0.5M33 03:15–04:05: quality 0.6M33 04:05–04:55: quality 0.3M33 04:55–05:35: quality 0.1observe M33 02:20–03:45scheduleNGC 7000V1057 CygM31M33M3122:0000:0002:0004:0006:00

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
20:50–22:05 — nothing worth pointing at — 1.25
22:05–23:30 NGC 7000 1.42 0.44
23:30–00:55 V1057 Cyg 1.42 0.61
00:55–02:20 M31 1.42 0.54
02:20–03:45 M33 1.42 0.54
03:45–04:05 M45 0.33 0.38
04:05–04:35 M31 0.5 0.31
04:35–04:55 M45 0.33 0.31
04:55–06:05 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 41 unknown 03:20–04:05 (good) 89.7° at 06:10 68.9° 1.92
M42 Great Orion Nebula 0 unknown — 42.9° at 11:00 116.8° 0.0
M45 Seven Sisters 5 unknown 03:40–04:05 (marginal) 72.5° at 09:15 97.0° 0.67
NGC 7000 North America Nebula 57 unknown 22:55–00:30 (good) 87.2° at 02:25 58.0° 1.42
V1057 Cyg 57 unknown 22:55–00:30 (good) 87.3° at 02:25 57.9° 1.42
M33 Triangulum Pinwheel 27 unknown 01:15–04:05 (marginal) 79.1° at 07:00 71.3° 1.42

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-07-20"

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"}.