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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, 09 January 2031 · astronomical night 18:47 → 06:08 (11.34 h) · Moon 99% (full moon) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:40–18:15: quality 0.2M31 18:15–18:50: quality 0.4M31 18:50–20:50: quality 0.8M31 20:50–22:05: quality 0.7M31 22:05–23:30: quality 0.6M31 23:30–23:50: quality 0.5M31 23:50–00:15: quality 0.4M31 00:15–00:30: quality 0.3observe M31 20:55–22:15M42M42 18:55–19:25: quality 0.3M42 19:25–23:00: quality 0.4M42 23:00–01:40: quality 0.3M42 01:40–02:30: quality 0.2M45M45 17:40–18:15: quality 0.1M45 18:15–18:50: quality 0.3M45 18:50–19:40: quality 0.7M45 19:40–21:50: quality 0.6M45 21:50–23:55: quality 0.5M45 23:55–01:45: quality 0.4M45 01:45–02:15: quality 0.3M45 02:15–02:30: quality 0.2observe M45 23:35–02:00NGC 7000NGC 7000 17:40–18:15: quality 0.1NGC 7000 18:15–18:50: quality 0.4NGC 7000 18:50–19:20: quality 0.8NGC 7000 19:20–20:05: quality 0.7NGC 7000 20:05–20:20: quality 0.6NGC 7000 20:20–20:40: quality 0.5NGC 7000 20:40–21:00: quality 0.4NGC 7000 07:10–07:20: quality 0.1observe NGC 7000 19:35–20:55V1057 CygV1057 Cyg 17:40–18:15: quality 0.1V1057 Cyg 18:15–18:50: quality 0.4V1057 Cyg 18:50–19:25: quality 0.8V1057 Cyg 19:25–20:05: quality 0.7V1057 Cyg 20:05–20:20: quality 0.6V1057 Cyg 20:20–20:40: quality 0.5V1057 Cyg 20:40–21:00: quality 0.4V1057 Cyg 07:10–07:20: quality 0.1observe V1057 Cyg 18:15–19:35M33M33 17:40–18:15: quality 0.2M33 18:15–18:50: quality 0.4M33 18:50–20:20: quality 0.8M33 20:20–22:00: quality 0.7M33 22:00–23:30: quality 0.6M33 23:30–00:00: quality 0.5M33 00:00–00:25: quality 0.4M33 00:25–00:40: quality 0.3observe M33 22:15–23:35scheduleV1057 CygNGC 7000M31M33M4518:0020:0022:0000:0002:0004:0006:00

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
17:05–18:15 — nothing worth pointing at — 1.17
18:15–19:35 V1057 Cyg 1.33 0.61
19:35–20:55 NGC 7000 1.33 0.58
20:55–22:15 M31 1.33 0.69
22:15–23:35 M33 1.33 0.59
23:35–02:00 M45 2.42 0.41
02:00–07:50 — nothing worth pointing at — 5.83

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 82 unknown 18:50–22:50 (good) 89.7° at 17:50 96.1° 1.33
M42 Great Orion Nebula 28 unknown 19:10–00:35 (marginal) 42.9° at 22:40 44.6° 0.0
M45 Seven Sisters 69 unknown 18:50–20:40 (good) 72.5° at 20:55 63.1° 2.42
NGC 7000 North America Nebula 34 unknown 18:50–20:15 (good) 87.2° at 14:05 119.3° 1.33
V1057 Cyg 34 unknown 18:50–20:15 (good) 87.3° at 14:05 119.4° 1.33
M33 Triangulum Pinwheel 80 unknown 18:50–22:40 (good) 79.1° at 18:40 90.5° 1.33

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-01-09"

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"}.