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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, 10 October 2027 · astronomical night 20:20 → 05:55 (9.59 h) · Moon 80% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:20–19:50: quality 0.1M31 19:50–20:25: quality 0.3M31 20:25–21:55: quality 0.6M31 21:55–02:10: quality 0.7M31 02:10–03:10: quality 0.8M31 03:10–04:15: quality 1.0M31 04:15–05:40: quality 0.9M31 05:40–06:00: quality 0.8M31 06:00–06:30: quality 0.4M31 06:30–07:05: quality 0.1observe M31 21:40–23:30M42M42 01:55–02:10: quality 0.4M42 02:10–02:25: quality 0.5M42 02:25–02:45: quality 0.6M42 02:45–03:10: quality 0.7M42 03:10–04:00: quality 0.8M42 04:00–06:00: quality 0.9M42 06:00–06:30: quality 0.4M42 06:30–07:05: quality 0.1observe M42 03:55–05:45M45M45 22:20–22:25: quality 0.3M45 22:25–22:40: quality 0.4M45 22:40–23:00: quality 0.5M45 23:00–23:25: quality 0.6M45 23:25–00:50: quality 0.7M45 00:50–02:30: quality 0.8M45 02:30–03:10: quality 0.9M45 03:10–06:00: quality 1.0M45 06:00–06:30: quality 0.5M45 06:30–07:05: quality 0.1observe M45 01:20–03:10observe M45 05:45–06:30NGC 7000NGC 7000 19:20–19:50: quality 0.1NGC 7000 19:50–20:25: quality 0.3NGC 7000 20:25–03:05: quality 0.6NGC 7000 03:05–03:10: quality 0.5NGC 7000 03:10–03:15: quality 0.7NGC 7000 03:15–03:35: quality 0.6NGC 7000 03:35–03:50: quality 0.5NGC 7000 03:50–04:00: quality 0.4observe NGC 7000 19:50–21:40V1057 CygV1057 Cyg 19:20–19:50: quality 0.1V1057 Cyg 19:50–20:25: quality 0.3V1057 Cyg 20:25–03:00: quality 0.6V1057 Cyg 03:00–03:10: quality 0.5V1057 Cyg 03:10–03:15: quality 0.7V1057 Cyg 03:15–03:35: quality 0.6V1057 Cyg 03:35–03:50: quality 0.5V1057 Cyg 03:50–04:00: quality 0.4observe V1057 Cyg 03:10–03:55M33M33 19:50–20:25: quality 0.2M33 20:25–20:50: quality 0.5M33 20:50–22:50: quality 0.6M33 22:50–01:55: quality 0.7M33 01:55–03:10: quality 0.8M33 03:10–04:40: quality 1.0M33 04:40–06:00: quality 0.9M33 06:00–06:30: quality 0.4M33 06:30–07:05: quality 0.1observe M33 23:30–01:20scheduleNGC 7000M31M33M45V1057 CygM42M4520:0022:0000:0002:0004:0006:00

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
18:45–19:50 — nothing worth pointing at — 1.08
19:50–21:40 NGC 7000 1.83 0.53
21:40–23:30 M31 1.83 0.66
23:30–01:20 M33 1.83 0.71
01:20–03:10 M45 1.83 0.84
03:10–03:55 V1057 Cyg 0.75 0.55
03:55–05:45 M42 1.83 0.87
05:45–06:30 M45 0.75 0.66
06:30–07:30 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 unknown 20:45–06:00 (good) 89.6° at 00:50 67.1° 1.83
M42 Great Orion Nebula 77 unknown 02:35–06:00 (good) 42.9° at 05:40 115.4° 1.83
M45 Seven Sisters 100 unknown 23:05–06:00 (good) 72.5° at 03:50 95.1° 2.58
NGC 7000 North America Nebula 67 unknown 20:25–02:30 (good) 87.3° at 21:05 57.4° 1.83
V1057 Cyg 67 unknown 20:25–02:30 (good) 87.3° at 21:05 57.3° 0.75
M33 Triangulum Pinwheel 100 unknown 21:55–06:00 (good) 79.1° at 01:40 69.5° 1.83
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-10-10"

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"}.