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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, 08 January 2026 · astronomical night 18:47 → 06:08 (11.36 h) · Moon 67% (waning gibbous) · weather: ERA5 history

M31M31 20:00–21:00: quality 0.4M31 21:00–22:00: quality 0.3M31 22:00–23:00: quality 0.4M31 23:00–23:10: quality 0.8M31 23:10–23:35: quality 0.7M31 23:35–23:55: quality 0.6M31 23:55–00:20: quality 0.5M31 00:20–00:35: quality 0.4observe M31 20:05–21:15M42M42 20:00–22:00: quality 0.3M42 22:00–23:00: quality 0.4M42 23:00–23:10: quality 0.8M42 23:10–01:20: quality 0.7M42 01:20–01:50: quality 0.6M42 01:50–02:10: quality 0.5M42 02:10–02:30: quality 0.4M42 02:30–02:35: quality 0.3observe M42 23:35–01:35M45M45 20:00–21:00: quality 0.4M45 21:00–22:00: quality 0.3M45 22:00–23:00: quality 0.5M45 23:00–23:15: quality 0.9M45 23:15–01:00: quality 0.8M45 01:00–01:50: quality 0.7M45 01:50–02:05: quality 0.6M45 02:05–02:20: quality 0.5M45 02:20–02:35: quality 0.4observe M45 22:25–23:35observe M45 01:35–02:35NGC 7000NGC 7000 20:00–20:25: quality 0.3NGC 7000 20:25–21:00: quality 0.2NGC 7000 21:00–21:05: quality 0.1NGC 7000 07:15–07:20: quality 0.1observe NGC 7000 20:00–20:05V1057 CygV1057 Cyg 20:00–20:25: quality 0.3V1057 Cyg 20:25–21:00: quality 0.2V1057 Cyg 21:00–21:05: quality 0.1V1057 Cyg 07:15–07:20: quality 0.1M33M33 20:00–21:00: quality 0.4M33 21:00–22:00: quality 0.3M33 22:00–22:25: quality 0.5M33 22:25–23:00: quality 0.4M33 23:00–23:10: quality 0.8M33 23:10–23:55: quality 0.7M33 23:55–00:15: quality 0.6M33 00:15–00:30: quality 0.5M33 00:30–00:45: quality 0.4observe M33 21:15–22:25scheduleM31M33M45M42M4518:0020:0022:0000:0002:0004:0006:00

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
17:05–20:00 — nothing worth pointing at — 2.92
20:00–20:05 NGC 7000 0.08 0.3
20:05–21:15 M31 1.17 0.38
21:15–22:25 M33 1.17 0.38
22:25–23:35 M45 1.17 0.68
23:35–01:35 M42 2.0 0.69
01:35–02:35 M45 1.0 0.55
02:35–07:50 — nothing worth pointing at — 5.25

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 39 23:00–23:45 (good) 89.5° at 17:50 138.4° 1.17
M42 Great Orion Nebula 89 54 23:00–01:40 (good) 42.9° at 22:45 94.6° 2.0
M45 Seven Sisters 100 53 23:00–01:55 (good) 72.5° at 20:55 119.4° 2.17
NGC 7000 North America Nebula 42 5 20:00–20:05 (marginal) 87.2° at 14:10 122.0° 0.08
V1057 Cyg 42 5 20:00–20:05 (marginal) 87.3° at 14:10 122.1° 0.0
M33 Triangulum Pinwheel 100 41 23:00–00:05 (good) 79.1° at 18:45 142.2° 1.17

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-01-08"

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"}.