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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 Sunday, 17 October 2027 · astronomical night 20:09 → 06:03 (9.9 h) · Moon 94% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:10–19:40: quality 0.1M31 19:40–20:10: quality 0.3M31 20:10–22:40: quality 0.5M31 22:40–00:50: quality 0.4M31 00:50–06:05: quality 0.3M31 06:05–06:40: quality 0.1observe M31 00:55–02:40M42M42 01:25–02:10: quality 0.2M42 02:10–05:10: quality 0.3M42 05:10–06:05: quality 0.4M42 06:05–06:40: quality 0.2M42 06:40–07:10: quality 0.1observe M42 03:10–04:55M45M45 21:50–22:15: quality 0.2M45 22:15–06:05: quality 0.3M45 06:05–06:40: quality 0.2M45 06:40–07:10: quality 0.1observe M45 04:55–06:05NGC 7000NGC 7000 19:10–19:25: quality 0.2NGC 7000 19:25–19:40: quality 0.1NGC 7000 19:40–20:10: quality 0.4NGC 7000 20:10–20:15: quality 0.8NGC 7000 20:15–22:55: quality 0.7NGC 7000 22:55–00:40: quality 0.6NGC 7000 00:40–02:25: quality 0.5NGC 7000 02:25–02:55: quality 0.4NGC 7000 02:55–03:25: quality 0.3NGC 7000 03:25–03:30: quality 0.2observe NGC 7000 19:40–21:25observe NGC 7000 02:40–03:10V1057 CygV1057 Cyg 19:10–19:25: quality 0.2V1057 Cyg 19:25–19:40: quality 0.1V1057 Cyg 19:40–20:10: quality 0.4V1057 Cyg 20:10–20:15: quality 0.8V1057 Cyg 20:15–22:55: quality 0.7V1057 Cyg 22:55–00:40: quality 0.6V1057 Cyg 00:40–02:25: quality 0.5V1057 Cyg 02:25–02:55: quality 0.4V1057 Cyg 02:55–03:25: quality 0.3V1057 Cyg 03:25–03:30: quality 0.2observe V1057 Cyg 21:25–23:10M33M33 19:15–19:25: quality 0.1M33 19:35–19:40: quality 0.1M33 19:40–20:10: quality 0.2M33 20:10–20:45: quality 0.5M33 20:45–23:50: quality 0.4M33 23:50–06:05: quality 0.3M33 06:05–06:40: quality 0.1observe M33 23:10–00:55scheduleNGC 7000V1057 CygM33M31M42M4520:0022:0000:0002:0004:0006:00

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
18:35–19:40 — nothing worth pointing at — 1.08
19:40–21:25 NGC 7000 1.75 0.63
21:25–23:10 V1057 Cyg 1.75 0.67
23:10–00:55 M33 1.75 0.34
00:55–02:40 M31 1.75 0.33
02:40–03:10 NGC 7000 0.5 0.35
03:10–04:55 M42 1.75 0.32
04:55–06:05 M45 1.17 0.32
06:05–07:40 — nothing worth pointing at — 1.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 53 unknown 20:10–04:00 (marginal) 89.7° at 00:20 36.8° 1.75
M42 Great Orion Nebula 15 unknown 03:05–06:05 (marginal) 42.9° at 05:10 44.3° 1.75
M45 Seven Sisters 21 unknown 22:35–00:20 (marginal) 72.5° at 03:25 6.9° 1.17
NGC 7000 North America Nebula 75 unknown 20:10–23:55 (good) 87.2° at 20:35 77.1° 2.25
V1057 Cyg 75 unknown 20:10–23:55 (good) 87.3° at 20:35 77.1° 1.75
M33 Triangulum Pinwheel 40 unknown 20:10–01:05 (marginal) 79.1° at 01:10 24.0° 1.75
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-10-17"

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"}.