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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 Saturday, 01 February 2031 · astronomical night 19:11 → 05:57 (10.76 h) · Moon 74% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

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

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
17:35–19:15 — nothing worth pointing at — 1.67
19:15–20:15 M31 1.0 0.52
20:15–21:15 M33 1.0 0.45
21:15–22:15 M45 1.0 0.43
22:15–00:40 M42 2.42 0.39
00:40–05:40 — nothing worth pointing at — 5.0
05:40–06:00 NGC 7000 0.33 0.45
06:00–06:15 — nothing worth pointing at — 0.25
06:15–06:30 NGC 7000 0.25 0.32
06:30–07:35 — nothing worth pointing at — 1.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 25 unknown 19:15–22:40 (marginal) 89.7° at 16:20 53.2° 1.0
M42 Great Orion Nebula 24 unknown 19:15–00:40 (marginal) 42.9° at 21:10 30.2° 2.42
M45 Seven Sisters 28 unknown 19:15–00:40 (marginal) 72.5° at 19:20 12.6° 1.0
NGC 7000 North America Nebula 8 unknown 05:40–06:00 (marginal) 87.2° at 12:35 91.6° 0.58
V1057 Cyg 8 unknown 05:40–06:00 (marginal) 87.3° at 12:35 91.6° 0.0
M33 Triangulum Pinwheel 23 unknown 19:15–22:50 (marginal) 79.1° at 17:10 42.4° 1.0

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-02-01"

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"}.