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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 Wednesday, 13 January 2027 · astronomical night 18:51 → 06:07 (11.27 h) · Moon 31% (waxing crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:45–18:20: quality 0.1M31 18:20–18:55: quality 0.4M31 18:55–22:20: quality 0.8M31 22:20–22:50: quality 0.7M31 22:50–23:20: quality 0.8M31 23:20–23:35: quality 0.7M31 23:35–23:50: quality 0.6M31 23:50–00:05: quality 0.5M31 00:05–00:15: quality 0.4observe M31 23:15–00:05M42M42 18:40–18:55: quality 0.2M42 18:55–19:15: quality 0.5M42 19:15–19:30: quality 0.6M42 19:30–20:15: quality 0.7M42 20:15–22:50: quality 0.8M42 22:50–00:10: quality 0.9M42 00:10–01:20: quality 0.8M42 01:20–01:35: quality 0.7M42 01:35–01:50: quality 0.6M42 01:50–02:10: quality 0.5M42 02:10–02:15: quality 0.4observe M42 00:05–02:15M45M45 17:45–18:20: quality 0.1M45 18:20–18:55: quality 0.4M45 18:55–22:50: quality 0.9M45 22:50–23:20: quality 1.0M45 23:20–00:40: quality 0.9M45 00:40–01:25: quality 0.8M45 01:25–01:40: quality 0.7M45 01:40–01:55: quality 0.6M45 01:55–02:10: quality 0.5M45 02:10–02:15: quality 0.4observe M45 20:35–21:55NGC 7000NGC 7000 17:45–18:20: quality 0.1NGC 7000 18:20–18:55: quality 0.4NGC 7000 18:55–19:45: quality 0.7NGC 7000 19:45–20:05: quality 0.6NGC 7000 20:05–20:25: quality 0.5NGC 7000 20:25–20:45: quality 0.4NGC 7000 06:55–07:20: quality 0.1observe NGC 7000 18:20–19:40V1057 CygV1057 Cyg 17:45–18:20: quality 0.1V1057 Cyg 18:20–18:55: quality 0.4V1057 Cyg 18:55–19:45: quality 0.7V1057 Cyg 19:45–20:05: quality 0.6V1057 Cyg 20:05–20:25: quality 0.5V1057 Cyg 20:25–20:45: quality 0.4V1057 Cyg 06:55–07:20: quality 0.1observe V1057 Cyg 19:40–20:35M33M33 17:45–18:20: quality 0.1M33 18:20–18:55: quality 0.4M33 18:55–23:35: quality 0.8M33 23:35–23:50: quality 0.7M33 23:50–00:05: quality 0.6M33 00:05–00:20: quality 0.5M33 00:20–00:25: quality 0.4observe M33 21:55–23:15scheduleNGC 7000V1057 CygM45M33M31M4218:0020:0022:0000:0002:0004:0006:00

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
17:10–18:20 — nothing worth pointing at — 1.17
18:20–19:40 NGC 7000 1.33 0.55
19:40–20:35 V1057 Cyg 0.92 0.53
20:35–21:55 M45 1.33 0.88
21:55–23:15 M33 1.33 0.79
23:15–00:05 M31 0.83 0.62
00:05–02:15 M42 2.17 0.72
02:15–07:50 — nothing worth pointing at — 5.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 84 unknown 18:55–23:40 (good) 89.6° at 17:35 39.3° 0.83
M42 Great Orion Nebula 88 unknown 19:20–01:45 (good) 42.9° at 22:25 84.9° 2.17
M45 Seven Sisters 98 unknown 18:55–01:50 (good) 72.5° at 20:35 59.0° 1.33
NGC 7000 North America Nebula 25 unknown 18:55–19:55 (good) 87.3° at 13:50 56.7° 1.33
V1057 Cyg 25 unknown 18:55–19:55 (good) 87.3° at 13:50 56.6° 0.92
M33 Triangulum Pinwheel 84 unknown 18:55–23:55 (good) 79.1° at 18:25 35.6° 1.33
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-01-13"

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"}.