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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 Friday, 03 January 2031 · astronomical night 18:42 → 06:08 (11.43 h) · Moon 81% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:35–18:10: quality 0.1M31 18:10–18:45: quality 0.2M31 18:45–18:50: quality 0.5M31 18:50–00:10: quality 0.4M31 00:10–00:45: quality 0.3M31 00:45–00:55: quality 0.2observe M31 21:05–22:30M42M42 19:20–19:40: quality 0.2M42 19:40–20:20: quality 0.3M42 20:20–23:40: quality 0.4M42 23:40–02:05: quality 0.5M42 02:05–02:35: quality 0.4M42 02:35–02:55: quality 0.3observe M42 22:30–23:55observe M42 02:40–02:45M45M45 17:35–18:10: quality 0.1M45 18:10–18:45: quality 0.2M45 18:45–01:30: quality 0.4M45 01:30–02:00: quality 0.5M45 02:00–02:30: quality 0.4M45 02:30–02:55: quality 0.3observe M45 00:35–02:40NGC 7000NGC 7000 17:35–18:10: quality 0.1NGC 7000 18:10–18:45: quality 0.3NGC 7000 18:45–19:40: quality 0.6NGC 7000 19:40–20:35: quality 0.5NGC 7000 20:35–21:00: quality 0.4NGC 7000 21:00–21:25: quality 0.3observe NGC 7000 18:10–18:40observe NGC 7000 18:45–19:40V1057 CygV1057 Cyg 17:35–18:10: quality 0.1V1057 Cyg 18:10–18:45: quality 0.3V1057 Cyg 18:45–19:40: quality 0.6V1057 Cyg 19:40–20:35: quality 0.5V1057 Cyg 20:35–21:00: quality 0.4V1057 Cyg 21:00–21:25: quality 0.3observe V1057 Cyg 19:40–21:05M33M33 17:35–18:10: quality 0.1M33 18:10–18:45: quality 0.2M33 18:45–00:15: quality 0.4M33 00:15–00:50: quality 0.3M33 00:50–01:05: quality 0.2observe M33 23:55–00:35scheduleNGC 7000V1057 CygM31M42M4518:0020:0022:0000:0002:0004:0006:00

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
17:00–18:10 — nothing worth pointing at — 1.17
18:10–18:40 NGC 7000 0.5 0.31
18:40–18:45 — nothing worth pointing at — 0.08
18:45–19:40 NGC 7000 0.92 0.57
19:40–21:05 V1057 Cyg 1.42 0.47
21:05–22:30 M31 1.42 0.41
22:30–23:55 M42 1.42 0.44
23:55–00:35 M33 0.67 0.35
00:35–02:40 M45 2.08 0.43
02:40–02:45 M42 0.08 0.31
02:45–07:50 — nothing worth pointing at — 5.08

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 30 unknown 18:45–00:25 (marginal) 89.6° at 18:15 38.6° 1.42
M42 Great Orion Nebula 37 unknown 20:00–02:45 (marginal) 42.9° at 23:05 42.9° 1.5
M45 Seven Sisters 39 unknown 18:45–02:40 (marginal) 72.5° at 21:15 9.1° 2.08
NGC 7000 North America Nebula 23 unknown 18:45–21:15 (marginal) 87.2° at 14:30 79.0° 1.42
V1057 Cyg 23 unknown 18:45–21:15 (marginal) 87.3° at 14:30 79.0° 1.42
M33 Triangulum Pinwheel 25 unknown 18:45–00:35 (marginal) 79.1° at 19:05 25.0° 0.67
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2031-01-03"

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"}.