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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 Thursday, 16 July 2026 · astronomical night 22:56 → 03:58 (5.04 h) · Moon 9% (waxing crescent) · weather: ERA5 history

M31M31 23:50–00:00: quality 0.3M31 04:00–04:50: quality 0.4M31 04:50–05:30: quality 0.1observe M31 04:00–04:35M42M45M45 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 0.1NGC 7000NGC 7000 21:30–22:00: quality 0.1NGC 7000 22:10–23:00: quality 0.1NGC 7000 23:00–00:00: quality 0.7NGC 7000 04:00–04:50: quality 0.4NGC 7000 04:50–05:30: quality 0.1observe NGC 7000 23:00–23:35V1057 CygV1057 Cyg 21:30–22:00: quality 0.1V1057 Cyg 22:10–23:00: quality 0.1V1057 Cyg 23:00–00:00: quality 0.7V1057 Cyg 04:00–04:50: quality 0.4V1057 Cyg 04:50–05:30: quality 0.1observe V1057 Cyg 23:35–00:00observe V1057 Cyg 04:35–04:50M33M33 04:00–04:50: quality 0.4M33 04:50–05:30: quality 0.1scheduleNGC 7000M3122:0000:0002:0004:0006:00

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
23:00–23:35 NGC 7000 0.58 0.67
23:35–00:00 V1057 Cyg 0.42 0.69
00:00–04:00 — nothing worth pointing at — 4.0
04:00–04:35 M31 0.58 0.45
04:35–04:50 V1057 Cyg 0.25 0.45
04:50–06:05 — nothing worth pointing at — 1.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 99 13 04:00–04:50 (marginal) 89.7° at 06:25 115.5° 0.58
M42 Great Orion Nebula 0 0 — 42.9° at 11:15 69.2° 0.0
M45 Seven Sisters 4 3 04:30–04:50 (marginal) 72.5° at 09:30 89.2° 0.0
NGC 7000 North America Nebula 100 22 23:00–00:00 (good) 87.2° at 02:40 121.8° 0.58
V1057 Cyg 100 22 23:00–00:00 (good) 87.3° at 02:40 121.9° 0.67
M33 Triangulum Pinwheel 59 11 04:00–04:50 (marginal) 79.1° at 07:15 114.2° 0.0

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-07-16"

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"}.