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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 Friday, 26 June 2026 · astronomical night 23:10 → 03:37 (4.45 h) · Moon 92% (waxing gibbous) · weather: ERA5 history

M31M31 01:05–01:25: quality 0.4M31 01:25–01:45: quality 0.5M31 01:45–02:00: quality 0.6M31 02:00–02:40: quality 0.7M31 02:40–03:15: quality 0.8M31 03:15–03:40: quality 0.9M31 03:40–04:35: quality 0.5M31 04:35–05:15: quality 0.1observe M31 01:50–03:15M42M45NGC 7000NGC 7000 22:00–22:20: quality 0.1NGC 7000 22:20–23:15: quality 0.3NGC 7000 23:15–01:00: quality 0.7NGC 7000 01:00–03:00: quality 0.8NGC 7000 03:00–03:15: quality 0.9NGC 7000 03:15–03:40: quality 1.0NGC 7000 03:40–04:35: quality 0.5NGC 7000 04:35–05:15: quality 0.1observe NGC 7000 23:00–00:25V1057 CygV1057 Cyg 22:00–22:20: quality 0.1V1057 Cyg 22:20–23:15: quality 0.3V1057 Cyg 23:15–01:00: quality 0.7V1057 Cyg 01:00–03:00: quality 0.8V1057 Cyg 03:00–03:15: quality 0.9V1057 Cyg 03:15–03:40: quality 1.0V1057 Cyg 03:40–04:35: quality 0.5V1057 Cyg 04:35–05:15: quality 0.1observe V1057 Cyg 00:25–01:50M33M33 02:40–02:55: quality 0.4M33 02:55–03:05: quality 0.5M33 03:05–03:15: quality 0.6M33 03:15–03:30: quality 0.7M33 03:30–03:40: quality 0.8M33 03:40–04:35: quality 0.4M33 04:35–05:15: quality 0.1observe M33 03:15–04:35scheduleNGC 7000V1057 CygM31M3322:0000:0002:0004:00

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
20:55–23:00 — nothing worth pointing at — 2.08
23:00–00:25 NGC 7000 1.42 0.62
00:25–01:50 V1057 Cyg 1.42 0.76
01:50–03:15 M31 1.42 0.73
03:15–04:35 M33 1.33 0.52
04:35–05:50 — nothing worth pointing at — 1.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 52 51 01:50–03:40 (good) 89.7° at 07:45 137.6° 1.42
M42 Great Orion Nebula 0 0 — 42.9° at 12:40 140.6° 0.0
M45 Seven Sisters 0 0 — 72.5° at 10:45 177.7° 0.0
NGC 7000 North America Nebula 100 95 23:15–03:40 (good) 87.3° at 04:00 98.4° 1.42
V1057 Cyg 100 95 23:15–03:40 (good) 87.3° at 04:00 98.4° 1.42
M33 Triangulum Pinwheel 21 21 03:15–03:40 (good) 79.1° at 08:35 148.7° 1.33

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-06-26"

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"}.