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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 Sunday, 10 January 2027 · astronomical night 18:48 → 06:08 (11.33 h) · Moon 8% (waxing crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:45–18:20: quality 0.1M31 18:20–18:50: quality 0.5M31 18:50–21:10: quality 1.0M31 21:10–22:35: quality 0.9M31 22:35–23:30: quality 0.8M31 23:30–23:45: quality 0.7M31 23:45–00:00: quality 0.6M31 00:00–00:20: quality 0.5M31 00:20–00:25: quality 0.4observe M31 18:20–19:45M42M42 18:50–19:00: quality 0.4M42 19:00–19:15: quality 0.5M42 19:15–19:30: quality 0.6M42 19:30–19:50: quality 0.7M42 19:50–21:00: quality 0.8M42 21:00–00:20: quality 0.9M42 00:20–01:30: quality 0.8M42 01:30–01:50: quality 0.7M42 01:50–02:05: quality 0.6M42 02:05–02:20: quality 0.5M42 02:20–02:25: quality 0.4observe M42 23:30–02:25M45M45 17:45–18:20: quality 0.1M45 18:20–18:50: quality 0.5M45 18:50–23:30: quality 1.0M45 23:30–00:50: quality 0.9M45 00:50–01:40: quality 0.8M45 01:40–01:55: quality 0.7M45 01:55–02:05: quality 0.6M45 02:05–02:20: quality 0.5M45 02:20–02:25: quality 0.4observe M45 22:05–23:30NGC 7000NGC 7000 17:45–18:20: quality 0.1NGC 7000 18:20–18:50: quality 0.4NGC 7000 18:50–19:55: quality 0.8NGC 7000 19:55–20:15: quality 0.7NGC 7000 20:15–20:30: quality 0.6NGC 7000 20:30–20:50: quality 0.5NGC 7000 20:50–20:55: quality 0.4NGC 7000 07:10–07:20: quality 0.1observe NGC 7000 19:45–20:40V1057 CygV1057 Cyg 17:45–18:20: quality 0.1V1057 Cyg 18:20–18:50: quality 0.4V1057 Cyg 18:50–19:55: quality 0.8V1057 Cyg 19:55–20:15: quality 0.7V1057 Cyg 20:15–20:30: quality 0.6V1057 Cyg 20:30–20:45: quality 0.5V1057 Cyg 20:45–20:55: quality 0.4V1057 Cyg 07:10–07:20: quality 0.1M33M33 17:45–18:20: quality 0.1M33 18:20–18:50: quality 0.5M33 18:50–21:40: quality 1.0M33 21:40–23:00: quality 0.9M33 23:00–23:50: quality 0.8M33 23:50–00:00: quality 0.7M33 00:00–00:15: quality 0.6M33 00:15–00:30: quality 0.5M33 00:30–00:40: quality 0.4observe M33 20:40–22:05scheduleM31NGC 7000M33M45M4218:0020:0022:0000:0002:0004:0006:00

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
17:05–18:20 — nothing worth pointing at — 1.25
18:20–19:45 M31 1.42 0.81
19:45–20:40 NGC 7000 0.92 0.65
20:40–22:05 M33 1.42 0.97
22:05–23:30 M45 1.42 0.99
23:30–02:25 M42 2.92 0.76
02:25–07:50 — nothing worth pointing at — 5.42

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:50–23:55 (good) 89.7° at 17:45 68.3° 1.42
M42 Great Orion Nebula 89 unknown 19:25–01:55 (good) 42.9° at 22:35 115.4° 2.92
M45 Seven Sisters 100 unknown 18:50–02:00 (good) 72.5° at 20:50 95.8° 1.42
NGC 7000 North America Nebula 37 unknown 18:50–20:20 (good) 87.2° at 14:00 58.5° 0.92
V1057 Cyg 37 unknown 18:50–20:20 (good) 87.3° at 14:00 58.5° 0.0
M33 Triangulum Pinwheel 100 unknown 18:50–00:10 (good) 79.1° at 18:35 70.4° 1.42

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-01-10"

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"}.