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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.

Try: an autumn deep-sky night  ·  ← previous night · next night →

Night of Tuesday, 28 April 2026 · astronomical night 22:02 → 04:34 (6.54 h) · Moon 92% (waxing gibbous) · weather: ERA5 history

M31M31 05:00–05:15: quality 0.2M31 05:15–05:55: quality 0.1M42M45NGC 7000NGC 7000 01:00–01:35: quality 0.2NGC 7000 01:35–03:50: quality 0.3NGC 7000 03:50–04:00: quality 0.4NGC 7000 04:00–04:25: quality 0.8NGC 7000 04:25–04:35: quality 0.9NGC 7000 04:35–04:55: quality 0.4NGC 7000 04:55–05:15: quality 0.5NGC 7000 05:15–05:55: quality 0.1observe NGC 7000 01:50–02:00observe NGC 7000 02:10–03:40V1057 CygV1057 Cyg 01:05–01:35: quality 0.2V1057 Cyg 01:35–03:50: quality 0.3V1057 Cyg 03:50–04:00: quality 0.4V1057 Cyg 04:00–04:25: quality 0.8V1057 Cyg 04:25–04:35: quality 0.9V1057 Cyg 04:35–04:55: quality 0.4V1057 Cyg 04:55–05:15: quality 0.5V1057 Cyg 05:15–05:55: quality 0.1observe V1057 Cyg 03:40–05:15M33scheduleNGC 7000V1057 Cyg22:0000:0002:0004:0006:00

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
20:15–01:50 — nothing worth pointing at — 5.58
01:50–02:00 NGC 7000 0.17 0.31
02:00–02:10 — nothing worth pointing at — 0.17
02:10–03:40 NGC 7000 1.5 0.32
03:40–05:15 V1057 Cyg 1.58 0.58
05:15–06:25 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 1 1 — 89.7° at 11:35 143.5° 0.0
M42 Great Orion Nebula 0 0 — 42.9° at 16:30 101.0° 0.0
M45 Seven Sisters 0 0 — 72.5° at 14:45 127.3° 0.0
NGC 7000 North America Nebula 65 39 04:00–04:35 (good) 87.2° at 07:50 120.9° 1.67
V1057 Cyg 64 39 04:00–04:35 (good) 87.3° at 07:50 120.9° 1.58
M33 Triangulum Pinwheel 0 0 — 79.1° at 12:30 149.2° 0.0

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-04-28"

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"}.