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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 Friday, 29 January 2027 · astronomical night 19:08 → 05:59 (10.86 h) · Moon 45% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 18:05–18:40: quality 0.2M31 18:40–19:10: quality 0.5M31 19:10–19:55: quality 1.0M31 19:55–21:20: quality 0.9M31 21:20–22:15: quality 0.8M31 22:15–22:30: quality 0.7M31 22:30–22:50: quality 0.6M31 22:50–23:05: quality 0.5M31 23:05–23:15: quality 0.4observe M31 18:40–19:50M42M42 18:05–18:40: quality 0.1M42 18:40–19:10: quality 0.4M42 19:10–19:45: quality 0.8M42 19:45–23:05: quality 0.9M42 23:05–00:15: quality 0.8M42 00:15–00:35: quality 0.7M42 00:35–00:50: quality 0.6M42 00:50–01:05: quality 0.5M42 01:05–01:10: quality 0.4observe M42 22:10–01:10M45M45 18:05–18:40: quality 0.2M45 18:40–19:10: quality 0.5M45 19:10–22:15: quality 1.0M45 22:15–23:40: quality 0.9M45 23:40–00:25: quality 0.8M45 00:25–00:40: quality 0.7M45 00:40–00:50: quality 0.6M45 00:50–01:05: quality 0.5M45 01:05–01:10: quality 0.4observe M45 21:00–22:10NGC 7000NGC 7000 18:05–18:40: quality 0.1NGC 7000 18:40–18:50: quality 0.4NGC 7000 18:50–19:10: quality 0.3NGC 7000 19:10–19:15: quality 0.6NGC 7000 19:15–19:35: quality 0.5NGC 7000 19:35–19:40: quality 0.4NGC 7000 05:55–06:00: quality 0.4NGC 7000 06:00–06:20: quality 0.2NGC 7000 06:20–06:35: quality 0.3NGC 7000 06:35–07:10: quality 0.1observe NGC 7000 05:55–06:00V1057 CygV1057 Cyg 18:05–18:40: quality 0.1V1057 Cyg 18:40–18:50: quality 0.4V1057 Cyg 18:50–19:10: quality 0.3V1057 Cyg 19:10–19:15: quality 0.6V1057 Cyg 19:15–19:35: quality 0.5V1057 Cyg 19:35–19:40: quality 0.4V1057 Cyg 05:55–06:00: quality 0.4V1057 Cyg 06:00–06:20: quality 0.2V1057 Cyg 06:20–06:35: quality 0.3V1057 Cyg 06:35–07:10: quality 0.1M33M33 18:05–18:40: quality 0.2M33 18:40–19:10: quality 0.5M33 19:10–20:25: quality 1.0M33 20:25–21:45: quality 0.9M33 21:45–22:35: quality 0.8M33 22:35–22:45: quality 0.7M33 22:45–23:00: quality 0.6M33 23:00–23:15: quality 0.5M33 23:15–23:25: quality 0.4observe M33 19:50–21:00scheduleM31M33M45M4218:0020:0022:0000:0002:0004:0006:00

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
17:30–18:40 — nothing worth pointing at — 1.17
18:40–19:50 M31 1.17 0.77
19:50–21:00 M33 1.17 0.95
21:00–22:10 M45 1.17 0.99
22:10–01:10 M42 3.0 0.77
01:10–05:55 — nothing worth pointing at — 4.75
05:55–06:00 NGC 7000 0.08 0.39
06:00–07:40 — nothing worth pointing at — 1.67

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 92 unknown 19:10–22:40 (good) 89.7° at 16:30 147.5° 1.17
M42 Great Orion Nebula 89 unknown 19:10–00:40 (good) 42.9° at 21:20 130.4° 3.0
M45 Seven Sisters 100 unknown 19:10–00:45 (good) 72.5° at 19:35 165.6° 1.17
NGC 7000 North America Nebula 10 unknown 19:10–19:40 (marginal) 87.2° at 12:45 107.2° 0.08
V1057 Cyg 10 unknown 19:10–19:40 (marginal) 87.3° at 12:45 107.2° 0.0
M33 Triangulum Pinwheel 98 unknown 19:10–22:55 (good) 79.1° at 17:20 161.6° 1.17

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-01-29"

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"}.