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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, 14 August 2025 · astronomical night 22:07 → 04:43 (6.6 h) · Moon 65% (waning gibbous) · weather: ERA5 history

M31M31 21:55–22:10: quality 0.2M31 22:10–22:25: quality 0.5M31 22:25–22:45: quality 0.6M31 22:45–22:55: quality 0.7M31 22:55–23:00: quality 0.5M31 23:00–03:00: quality 0.6M31 03:00–04:00: quality 0.5M31 04:00–04:45: quality 0.1observe M31 00:10–01:30M42M45M45 02:00–02:05: quality 0.2M45 02:05–02:30: quality 0.3M45 02:30–02:55: quality 0.4M45 02:55–03:00: quality 0.5M45 03:00–04:00: quality 0.4M45 04:00–04:45: quality 0.1observe M45 02:50–04:00NGC 7000NGC 7000 20:55–21:30: quality 0.1NGC 7000 21:30–22:00: quality 0.4NGC 7000 22:00–22:10: quality 0.5NGC 7000 22:10–22:55: quality 0.9NGC 7000 22:55–01:20: quality 0.8NGC 7000 01:20–03:00: quality 0.7NGC 7000 03:00–04:00: quality 0.6NGC 7000 04:00–04:45: quality 0.1observe NGC 7000 21:30–22:50V1057 CygV1057 Cyg 20:55–21:30: quality 0.1V1057 Cyg 21:30–22:00: quality 0.4V1057 Cyg 22:00–22:10: quality 0.5V1057 Cyg 22:10–22:55: quality 0.9V1057 Cyg 22:55–01:20: quality 0.8V1057 Cyg 01:20–03:00: quality 0.7V1057 Cyg 03:00–04:00: quality 0.6V1057 Cyg 04:00–04:45: quality 0.1observe V1057 Cyg 22:50–00:10M33M33 23:25–23:45: quality 0.3M33 23:45–00:05: quality 0.4M33 00:05–02:00: quality 0.5M33 02:00–03:00: quality 0.6M33 03:00–04:00: quality 0.5M33 04:00–04:45: quality 0.1observe M33 01:30–02:50scheduleNGC 7000V1057 CygM31M33M4522:0000:0002:0004:0006:00

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
20:20–21:30 — nothing worth pointing at — 1.17
21:30–22:50 NGC 7000 1.33 0.66
22:50–00:10 V1057 Cyg 1.33 0.78
00:10–01:30 M31 1.33 0.59
01:30–02:50 M33 1.33 0.55
02:50–04:00 M45 1.17 0.41
04:00–06:30 — nothing worth pointing at — 2.5

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 76 63 22:35–22:55 (good) 89.7° at 04:30 30.3° 1.33
M42 Great Orion Nebula 0 0 — 42.9° at 09:20 56.1° 0.0
M45 Seven Sisters 17 10 02:15–04:00 (marginal) 72.5° at 07:35 24.3° 1.17
NGC 7000 North America Nebula 100 83 22:10–03:50 (good) 87.2° at 00:45 69.1° 1.33
V1057 Cyg 100 83 22:10–03:50 (good) 87.3° at 00:45 69.1° 1.33
M33 Triangulum Pinwheel 42 33 23:30–04:00 (marginal) 79.1° at 05:20 15.7° 1.33

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-08-14"

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"}.