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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, 21 January 2043 · astronomical night 18:59 → 06:04 (11.09 h) · Moon 86% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:55–18:30: quality 0.1M31 18:30–19:00: quality 0.3M31 19:00–20:30: quality 0.5M31 20:30–22:50: quality 0.4M31 22:50–23:30: quality 0.3M31 23:30–23:45: quality 0.2observe M31 20:10–21:10M42M42 18:30–19:00: quality 0.1M42 19:00–01:20: quality 0.3M42 01:20–01:45: quality 0.2observe M42 23:10–00:55M45M45 17:55–18:30: quality 0.1M45 18:30–19:00: quality 0.2M45 19:00–19:20: quality 0.4M45 19:20–01:20: quality 0.3M45 01:20–01:45: quality 0.2observe M45 22:10–23:10observe M45 00:55–01:00NGC 7000NGC 7000 17:55–18:30: quality 0.1NGC 7000 18:30–19:00: quality 0.3NGC 7000 19:00–19:10: quality 0.6NGC 7000 19:10–19:30: quality 0.5NGC 7000 19:30–19:55: quality 0.4NGC 7000 19:55–20:15: quality 0.3NGC 7000 06:25–06:40: quality 0.2NGC 7000 06:40–07:15: quality 0.1observe NGC 7000 20:00–20:10V1057 CygV1057 Cyg 17:55–18:30: quality 0.1V1057 Cyg 18:30–19:00: quality 0.3V1057 Cyg 19:00–19:10: quality 0.6V1057 Cyg 19:10–19:30: quality 0.5V1057 Cyg 19:30–19:55: quality 0.4V1057 Cyg 19:55–20:15: quality 0.3V1057 Cyg 06:25–06:40: quality 0.2V1057 Cyg 06:40–07:15: quality 0.1observe V1057 Cyg 19:00–20:00M33M33 17:55–18:30: quality 0.1M33 18:30–19:00: quality 0.2M33 19:00–19:10: quality 0.5M33 19:10–22:55: quality 0.4M33 22:55–23:35: quality 0.3M33 23:35–23:55: quality 0.2observe M33 21:10–22:10scheduleV1057 CygM31M33M45M4218:0020:0022:0000:0002:0004:0006:00

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
17:20–19:00 — nothing worth pointing at — 1.67
19:00–20:00 V1057 Cyg 1.0 0.46
20:00–20:10 NGC 7000 0.17 0.31
20:10–21:10 M31 1.0 0.44
21:10–22:10 M33 1.0 0.38
22:10–23:10 M45 1.0 0.32
23:10–00:55 M42 1.75 0.33
00:55–01:00 M45 0.08 0.31
01:00–07:45 — nothing worth pointing at — 6.75

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 26 unknown 19:00–23:10 (marginal) 89.5° at 17:05 55.1° 1.0
M42 Great Orion Nebula 18 unknown 20:55–00:55 (marginal) 42.9° at 21:55 33.6° 1.75
M45 Seven Sisters 20 unknown 19:00–01:00 (marginal) 72.6° at 20:05 18.7° 1.08
NGC 7000 North America Nebula 12 unknown 19:00–20:10 (marginal) 87.2° at 13:20 90.9° 0.17
V1057 Cyg 12 unknown 19:00–20:10 (marginal) 87.3° at 13:20 91.0° 1.0
M33 Triangulum Pinwheel 23 unknown 19:00–23:15 (marginal) 79.2° at 17:55 46.5° 1.0
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2043-01-21"

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"}.