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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 Friday, 10 October 2025 · astronomical night 20:19 → 05:56 (9.61 h) · Moon 80% (waning gibbous) · weather: ERA5 history

M31M31 19:20–19:50: quality 0.1M31 19:50–20:20: quality 0.4M31 20:20–20:45: quality 0.8M31 20:45–00:35: quality 0.6M31 00:35–02:00: quality 0.5M31 02:00–03:00: quality 0.2observe M31 22:20–23:35M42M42 01:55–02:00: quality 0.2M42 02:00–02:50: quality 0.1M42 02:50–03:00: quality 0.2M45M45 22:15–22:25: quality 0.2M45 22:25–22:50: quality 0.3M45 22:50–02:00: quality 0.4M45 02:00–03:00: quality 0.2observe M45 00:50–02:00NGC 7000NGC 7000 19:20–19:50: quality 0.1NGC 7000 19:50–20:20: quality 0.4NGC 7000 20:20–20:45: quality 0.9NGC 7000 20:45–21:00: quality 0.8NGC 7000 21:00–22:00: quality 0.7NGC 7000 22:00–22:30: quality 0.8NGC 7000 22:30–23:00: quality 0.7NGC 7000 23:00–23:30: quality 0.8NGC 7000 23:30–01:00: quality 0.7NGC 7000 01:00–01:55: quality 0.6NGC 7000 01:55–02:00: quality 0.5NGC 7000 02:00–02:55: quality 0.3NGC 7000 02:55–03:00: quality 0.2observe NGC 7000 19:50–21:05V1057 CygV1057 Cyg 19:20–19:50: quality 0.1V1057 Cyg 19:50–20:20: quality 0.4V1057 Cyg 20:20–20:45: quality 0.9V1057 Cyg 20:45–21:00: quality 0.8V1057 Cyg 21:00–22:00: quality 0.7V1057 Cyg 22:00–22:30: quality 0.8V1057 Cyg 22:30–23:00: quality 0.7V1057 Cyg 23:00–23:30: quality 0.8V1057 Cyg 23:30–01:00: quality 0.7V1057 Cyg 01:00–01:55: quality 0.6V1057 Cyg 01:55–02:00: quality 0.5V1057 Cyg 02:00–02:55: quality 0.3V1057 Cyg 02:55–03:00: quality 0.2observe V1057 Cyg 21:05–22:20M33M33 19:40–19:50: quality 0.1M33 19:50–20:05: quality 0.2M33 20:05–20:20: quality 0.3M33 20:20–20:25: quality 0.6M33 20:25–20:45: quality 0.7M33 20:45–23:00: quality 0.5M33 23:00–23:40: quality 0.6M33 23:40–01:00: quality 0.5M33 01:00–02:00: quality 0.4M33 02:00–03:00: quality 0.2observe M33 23:35–00:50scheduleNGC 7000V1057 CygM31M33M4520:0022:0000:0002:0004:0006:00

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
18:45–19:50 — nothing worth pointing at — 1.08
19:50–21:05 NGC 7000 1.25 0.68
21:05–22:20 V1057 Cyg 1.25 0.72
22:20–23:35 M31 1.25 0.61
23:35–00:50 M33 1.25 0.52
00:50–02:00 M45 1.17 0.39
02:00–07:30 — nothing worth pointing at — 5.5

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 90 59 22:00–22:55 (good) 89.6° at 00:45 48.5° 1.25
M42 Great Orion Nebula 13 1 — 42.9° at 05:40 35.9° 0.0
M45 Seven Sisters 35 18 22:35–02:00 (marginal) 72.5° at 03:50 10.7° 1.17
NGC 7000 North America Nebula 100 82 20:20–01:05 (good) 87.2° at 21:00 86.2° 1.25
V1057 Cyg 100 82 20:20–01:05 (good) 87.3° at 21:00 86.2° 1.25
M33 Triangulum Pinwheel 81 52 20:20–20:45 (good) 79.1° at 01:35 38.9° 1.25

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-10-10"

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"}.