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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, 05 January 2027 · astronomical night 18:44 → 06:08 (11.41 h) · Moon 3% (waning crescent) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:40–18:15: quality 0.2M31 18:15–18:45: quality 0.5M31 18:45–21:30: quality 1.0M31 21:30–22:55: quality 0.9M31 22:55–23:50: quality 0.8M31 23:50–00:05: quality 0.7M31 00:05–00:20: quality 0.6M31 00:20–00:40: quality 0.5M31 00:40–00:45: quality 0.4observe M31 23:50–00:40M42M42 19:10–19:20: quality 0.4M42 19:20–19:35: quality 0.5M42 19:35–19:50: quality 0.6M42 19:50–20:10: quality 0.7M42 20:10–21:20: quality 0.8M42 21:20–00:40: quality 0.9M42 00:40–01:50: quality 0.8M42 01:50–02:10: quality 0.7M42 02:10–02:25: quality 0.6M42 02:25–02:40: quality 0.5M42 02:40–02:45: quality 0.4observe M42 00:40–02:45M45M45 17:40–18:15: quality 0.1M45 18:15–18:45: quality 0.5M45 18:45–23:50: quality 1.0M45 23:50–01:10: quality 0.9M45 01:10–02:00: quality 0.8M45 02:00–02:10: quality 0.7M45 02:10–02:25: quality 0.6M45 02:25–02:40: quality 0.5M45 02:40–02:45: quality 0.4observe M45 22:25–23:50NGC 7000NGC 7000 17:40–18:15: quality 0.1NGC 7000 18:15–18:35: quality 0.5NGC 7000 18:35–18:45: quality 0.4NGC 7000 18:45–19:20: quality 0.9NGC 7000 19:20–20:15: quality 0.8NGC 7000 20:15–20:35: quality 0.7NGC 7000 20:35–20:50: quality 0.6NGC 7000 20:50–21:05: quality 0.5NGC 7000 21:05–21:15: quality 0.4observe NGC 7000 18:15–19:40V1057 CygV1057 Cyg 17:40–18:15: quality 0.1V1057 Cyg 18:15–18:35: quality 0.5V1057 Cyg 18:35–18:45: quality 0.4V1057 Cyg 18:45–19:20: quality 0.9V1057 Cyg 19:20–20:15: quality 0.8V1057 Cyg 20:15–20:35: quality 0.7V1057 Cyg 20:35–20:50: quality 0.6V1057 Cyg 20:50–21:05: quality 0.5V1057 Cyg 21:05–21:15: quality 0.4observe V1057 Cyg 19:40–21:00M33M33 17:40–18:15: quality 0.2M33 18:15–18:45: quality 0.5M33 18:45–22:00: quality 1.0M33 22:00–23:20: quality 0.9M33 23:20–00:05: quality 0.8M33 00:05–00:20: quality 0.7M33 00:20–00:35: quality 0.6M33 00:35–00:50: quality 0.5M33 00:50–00:55: quality 0.4observe M33 21:00–22:25scheduleNGC 7000V1057 CygM33M45M31M4218:0020:0022:0000:0002:0004:0006:00

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
17:00–18:15 — nothing worth pointing at — 1.25
18:15–19:40 NGC 7000 1.42 0.72
19:40–21:00 V1057 Cyg 1.33 0.7
21:00–22:25 M33 1.42 0.97
22:25–23:50 M45 1.42 0.99
23:50–00:40 M31 0.83 0.59
00:40–02:45 M42 2.08 0.72
02:45–07:50 — nothing worth pointing at — 5.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 18:45–00:15 (good) 89.7° at 18:05 119.8° 0.83
M42 Great Orion Nebula 89 unknown 19:45–02:15 (good) 42.9° at 22:55 147.0° 2.08
M45 Seven Sisters 100 unknown 18:45–02:20 (good) 72.5° at 21:10 155.2° 1.42
NGC 7000 North America Nebula 48 unknown 18:45–20:40 (good) 87.2° at 14:20 85.6° 1.42
V1057 Cyg 48 unknown 18:45–20:40 (good) 87.3° at 14:20 85.6° 1.33
M33 Triangulum Pinwheel 100 unknown 18:45–00:30 (good) 79.1° at 18:55 127.7° 1.42
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-01-05"

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"}.