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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 Tuesday, 19 January 2027 · astronomical night 18:57 → 06:05 (11.14 h) · Moon 90% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:55–18:25: quality 0.1M31 18:25–19:00: quality 0.3M31 19:00–20:45: quality 0.5M31 20:45–23:00: quality 0.4M31 23:00–23:35: quality 0.3M31 23:35–23:50: quality 0.2observe M31 20:40–21:40M42M42 18:25–19:00: quality 0.1M42 19:00–01:15: quality 0.3M42 01:15–01:50: quality 0.2M45M45 17:55–18:25: quality 0.1M45 18:25–19:00: quality 0.2M45 19:00–01:15: quality 0.3M45 01:15–01:50: quality 0.2observe M45 20:15–20:40NGC 7000NGC 7000 17:55–18:25: quality 0.1NGC 7000 18:25–19:00: quality 0.3NGC 7000 19:00–19:20: quality 0.6NGC 7000 19:20–19:40: quality 0.5NGC 7000 19:40–20:05: quality 0.4NGC 7000 20:05–20:20: quality 0.3NGC 7000 06:30–06:40: quality 0.2NGC 7000 06:40–07:15: quality 0.1observe NGC 7000 18:25–18:45observe NGC 7000 19:00–19:40V1057 CygV1057 Cyg 17:55–18:25: quality 0.1V1057 Cyg 18:25–19:00: quality 0.3V1057 Cyg 19:00–19:15: quality 0.6V1057 Cyg 19:15–19:40: quality 0.5V1057 Cyg 19:40–20:05: quality 0.4V1057 Cyg 20:05–20:20: quality 0.3V1057 Cyg 06:35–06:40: quality 0.2V1057 Cyg 06:40–07:15: quality 0.1observe V1057 Cyg 19:40–20:15M33M33 17:55–18:25: quality 0.1M33 18:25–19:00: quality 0.2M33 19:00–19:40: quality 0.5M33 19:40–22:50: quality 0.4M33 22:50–23:40: quality 0.3M33 23:40–00:00: quality 0.2observe M33 21:40–23:20scheduleM31M3318:0020:0022:0000:0002:0004:0006:00

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
17:15–18:25 — nothing worth pointing at — 1.17
18:25–18:45 NGC 7000 0.33 0.3
18:45–19:00 — nothing worth pointing at — 0.25
19:00–19:40 NGC 7000 0.67 0.53
19:40–20:15 V1057 Cyg 0.58 0.38
20:15–20:40 M45 0.42 0.3
20:40–21:40 M31 1.0 0.43
21:40–23:20 M33 1.67 0.36
23:20–07:45 — nothing worth pointing at — 8.42

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 28 unknown 19:00–23:15 (marginal) 89.7° at 17:10 59.0° 1.0
M42 Great Orion Nebula 14 unknown — 42.9° at 22:00 33.1° 0.0
M45 Seven Sisters 18 unknown 19:00–20:40 (marginal) 72.5° at 20:15 23.4° 0.42
NGC 7000 North America Nebula 13 unknown 19:00–20:15 (marginal) 87.2° at 13:25 93.6° 1.0
V1057 Cyg 13 unknown 19:00–20:15 (marginal) 87.3° at 13:25 93.6° 0.58
M33 Triangulum Pinwheel 24 unknown 19:00–23:20 (marginal) 79.1° at 18:00 50.9° 1.67

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-01-19"

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"}.