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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, 04 February 2027 · astronomical night 19:14 → 05:54 (10.66 h) · Moon 3% (new moon) · weather: none — the schedule is astronomy only; overall conditions unknown

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

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
17:35–18:45 — nothing worth pointing at — 1.17
18:45–19:55 M31 1.17 0.75
19:55–21:05 M33 1.17 0.91
21:05–22:15 M45 1.17 0.97
22:15–00:50 M42 2.58 0.74
00:50–05:30 — nothing worth pointing at — 4.67
05:30–05:55 NGC 7000 0.42 0.47
05:55–06:05 — nothing worth pointing at — 0.17
06:05–06:30 NGC 7000 0.42 0.34
06:30–07:30 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 77 unknown 19:15–22:15 (good) 89.5° at 16:05 91.8° 1.17
M42 Great Orion Nebula 89 unknown 19:15–00:20 (good) 42.9° at 21:00 135.1° 2.58
M45 Seven Sisters 100 unknown 19:15–00:20 (good) 72.5° at 19:10 122.7° 1.17
NGC 7000 North America Nebula 9 unknown 05:30–05:55 (marginal) 87.2° at 12:25 68.6° 0.83
V1057 Cyg 9 unknown 05:30–05:55 (marginal) 87.3° at 12:25 68.5° 0.0
M33 Triangulum Pinwheel 86 unknown 19:15–22:30 (good) 79.1° at 17:00 96.5° 1.17

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-02-04"

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"}.