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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, 15 July 2026 · astronomical night 22:57 → 03:57 (5.0 h) · Moon 3% (waxing crescent) · weather: ERA5 history

M31M31 23:55–00:00: quality 0.3M31 00:00–00:05: quality 0.1M31 00:05–01:00: quality 0.2M31 02:00–03:00: quality 0.8M31 03:00–03:25: quality 0.9M31 03:25–04:00: quality 1.0M31 04:00–04:50: quality 0.5M31 04:50–05:30: quality 0.1observe M31 02:00–03:00M42M45M45 04:00–04:15: quality 0.2M45 04:15–04:45: quality 0.3M45 04:45–04:50: quality 0.4M45 04:50–05:30: quality 0.1observe M45 04:30–04:50NGC 7000NGC 7000 22:10–23:00: quality 0.1NGC 7000 23:00–23:30: quality 0.6NGC 7000 23:30–00:00: quality 0.7NGC 7000 00:00–01:00: quality 0.3NGC 7000 02:00–03:00: quality 0.9NGC 7000 03:00–04:00: quality 1.0NGC 7000 04:00–04:50: quality 0.5NGC 7000 04:50–05:30: quality 0.1observe NGC 7000 23:00–00:00V1057 CygV1057 Cyg 22:10–23:00: quality 0.1V1057 Cyg 23:00–23:30: quality 0.6V1057 Cyg 23:30–00:00: quality 0.7V1057 Cyg 00:00–01:00: quality 0.3V1057 Cyg 02:00–03:00: quality 0.9V1057 Cyg 03:00–04:00: quality 1.0V1057 Cyg 04:00–04:50: quality 0.5V1057 Cyg 04:50–05:30: quality 0.1observe V1057 Cyg 00:00–01:00M33M33 02:00–02:10: quality 0.6M33 02:10–02:55: quality 0.7M33 02:55–03:20: quality 0.8M33 03:20–04:00: quality 0.9M33 04:00–04:25: quality 0.4M33 04:25–04:50: quality 0.5M33 04:50–05:30: quality 0.1observe M33 03:00–04:30scheduleNGC 7000V1057 CygM31M3322:0000:0002:0004:0006:00

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
20:50–23:00 — nothing worth pointing at — 2.17
23:00–00:00 NGC 7000 1.0 0.65
00:00–01:00 V1057 Cyg 1.0 0.31
01:00–02:00 — nothing worth pointing at — 1.0
02:00–03:00 M31 1.0 0.8
03:00–04:30 M33 1.5 0.72
04:30–04:50 M45 0.33 0.33
04:50–06:05 — nothing worth pointing at — 1.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 97 61 02:00–04:00 (good) 89.7° at 06:30 103.2° 1.0
M42 Great Orion Nebula 0 0 — 42.9° at 11:20 57.8° 0.0
M45 Seven Sisters 3 3 04:30–04:50 (marginal) 72.5° at 09:35 74.8° 0.33
NGC 7000 North America Nebula 100 57 02:00–04:00 (good) 87.3° at 02:45 117.8° 1.0
V1057 Cyg 100 57 02:00–04:00 (good) 87.3° at 02:45 117.9° 1.0
M33 Triangulum Pinwheel 57 47 02:05–04:00 (good) 79.1° at 07:20 100.3° 1.5

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-07-15"

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"}.