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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, 16 January 2027 · astronomical night 18:54 → 06:06 (11.21 h) · Moon 62% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:50–18:25: quality 0.1M31 18:25–18:55: quality 0.3M31 18:55–23:10: quality 0.5M31 23:10–23:40: quality 0.4M31 23:40–00:05: quality 0.3observe M31 23:00–23:55M42M42 18:30–18:40: quality 0.1M42 18:40–18:55: quality 0.2M42 18:55–19:20: quality 0.4M42 19:20–20:45: quality 0.5M42 20:45–01:15: quality 0.6M42 01:15–01:35: quality 0.5M42 01:35–01:55: quality 0.4M42 01:55–02:05: quality 0.3observe M42 21:45–23:00M45M45 17:50–18:25: quality 0.1M45 18:25–18:55: quality 0.3M45 18:55–20:55: quality 0.5M45 20:55–01:10: quality 0.6M45 01:10–01:35: quality 0.5M45 01:35–01:55: quality 0.4M45 01:55–02:05: quality 0.3observe M45 23:55–02:05NGC 7000NGC 7000 17:50–18:25: quality 0.1NGC 7000 18:25–18:55: quality 0.3NGC 7000 18:55–19:25: quality 0.6NGC 7000 19:25–19:50: quality 0.5NGC 7000 19:50–20:15: quality 0.4NGC 7000 20:15–20:35: quality 0.3NGC 7000 06:45–07:15: quality 0.1observe NGC 7000 18:25–18:30observe NGC 7000 18:55–20:05V1057 CygV1057 Cyg 17:50–18:25: quality 0.1V1057 Cyg 18:25–18:55: quality 0.3V1057 Cyg 18:55–19:25: quality 0.6V1057 Cyg 19:25–19:50: quality 0.5V1057 Cyg 19:50–20:15: quality 0.4V1057 Cyg 20:15–20:35: quality 0.3V1057 Cyg 06:45–07:15: quality 0.1observe V1057 Cyg 20:05–20:30M33M33 17:50–18:25: quality 0.1M33 18:25–18:55: quality 0.3M33 18:55–23:30: quality 0.5M33 23:30–23:55: quality 0.4M33 23:55–00:15: quality 0.3observe M33 20:30–21:45scheduleNGC 7000M33M42M31M4518:0020:0022:0000:0002:0004:0006:00

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
18:25–18:30 NGC 7000 0.08 0.3
18:30–18:55 — nothing worth pointing at — 0.42
18:55–20:05 NGC 7000 1.17 0.51
20:05–20:30 V1057 Cyg 0.42 0.34
20:30–21:45 M33 1.25 0.53
21:45–23:00 M42 1.25 0.6
23:00–23:55 M31 0.92 0.39
23:55–02:05 M45 2.17 0.51
02:05–07:45 — nothing worth pointing at — 5.67

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 36 unknown 18:55–23:55 (marginal) 89.5° at 17:20 30.4° 0.92
M42 Great Orion Nebula 62 unknown 22:20–01:00 (good) 42.9° at 22:15 53.4° 1.25
M45 Seven Sisters 59 unknown 18:55–02:05 (marginal) 72.5° at 20:25 19.7° 2.17
NGC 7000 North America Nebula 14 unknown 18:55–20:30 (marginal) 87.2° at 13:40 70.2° 1.25
V1057 Cyg 14 unknown 18:55–20:30 (marginal) 87.3° at 13:40 70.2° 0.42
M33 Triangulum Pinwheel 39 unknown 18:55–00:05 (marginal) 79.1° at 18:15 15.7° 1.25

💡 API
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-01-16"

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"}.