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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 September 2028 · astronomical night 21:13 → 05:21 (8.13 h) · Moon 61% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 20:10–20:40: quality 0.1M31 20:40–20:55: quality 0.3M31 20:55–21:15: quality 0.4M31 21:15–21:55: quality 0.8M31 21:55–22:40: quality 0.9M31 22:40–02:40: quality 0.7M31 02:40–05:25: quality 0.6M31 05:25–06:00: quality 0.3M31 06:00–06:30: quality 0.1observe M31 23:40–01:10M42M42 03:50–03:55: quality 0.2M42 03:55–04:25: quality 0.3M42 04:25–05:05: quality 0.4M42 05:05–05:25: quality 0.5M42 05:25–06:00: quality 0.2M42 06:00–06:30: quality 0.1observe M42 04:10–05:25M45M45 00:15–00:30: quality 0.3M45 00:30–00:50: quality 0.4M45 00:50–03:30: quality 0.5M45 03:30–04:05: quality 0.6M45 04:05–05:25: quality 0.5M45 05:25–06:00: quality 0.3M45 06:00–06:30: quality 0.1observe M45 02:40–04:10NGC 7000NGC 7000 20:10–20:15: quality 0.1NGC 7000 20:15–20:40: quality 0.2NGC 7000 20:40–21:15: quality 0.5NGC 7000 21:15–22:40: quality 1.0NGC 7000 22:40–23:50: quality 0.9NGC 7000 23:50–02:35: quality 0.8NGC 7000 02:35–04:05: quality 0.7NGC 7000 04:05–05:00: quality 0.6NGC 7000 05:00–05:20: quality 0.5NGC 7000 05:20–05:25: quality 0.4NGC 7000 05:25–05:55: quality 0.2observe NGC 7000 20:40–22:10V1057 CygV1057 Cyg 20:10–20:15: quality 0.1V1057 Cyg 20:15–20:40: quality 0.2V1057 Cyg 20:40–21:15: quality 0.5V1057 Cyg 21:15–22:40: quality 1.0V1057 Cyg 22:40–23:50: quality 0.9V1057 Cyg 23:50–02:35: quality 0.8V1057 Cyg 02:35–04:05: quality 0.7V1057 Cyg 04:05–05:00: quality 0.6V1057 Cyg 05:00–05:20: quality 0.5V1057 Cyg 05:20–05:25: quality 0.4V1057 Cyg 05:25–05:55: quality 0.2observe V1057 Cyg 22:10–23:40M33M33 21:40–21:45: quality 0.4M33 21:45–22:00: quality 0.5M33 22:00–22:15: quality 0.6M33 22:15–22:30: quality 0.7M33 22:30–22:40: quality 0.8M33 22:40–00:20: quality 0.6M33 00:20–01:35: quality 0.7M33 01:35–05:15: quality 0.6M33 05:15–05:25: quality 0.5M33 05:25–06:00: quality 0.3M33 06:00–06:30: quality 0.1observe M33 01:10–02:40scheduleNGC 7000V1057 CygM31M33M45M4220:0022:0000:0002:0004:0006:00

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
19:35–20:40 — nothing worth pointing at — 1.08
20:40–22:10 NGC 7000 1.5 0.81
22:10–23:40 V1057 Cyg 1.5 0.91
23:40–01:10 M31 1.5 0.72
01:10–02:40 M33 1.5 0.64
02:40–04:10 M45 1.5 0.55
04:10–05:25 M42 1.25 0.41
05:25–07:00 — nothing worth pointing at — 1.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 90 unknown 21:15–04:50 (good) 89.6° at 02:45 46.1° 1.5
M42 Great Orion Nebula 9 unknown 04:10–05:25 (marginal) 42.9° at 07:35 36.3° 1.25
M45 Seven Sisters 40 unknown 00:20–05:25 (marginal) 72.5° at 05:45 5.9° 1.5
NGC 7000 North America Nebula 100 unknown 21:15–04:50 (good) 87.2° at 23:00 84.9° 1.5
V1057 Cyg 100 unknown 21:15–04:50 (good) 87.3° at 23:00 84.9° 1.5
M33 Triangulum Pinwheel 80 unknown 22:05–03:00 (good) 79.1° at 03:35 35.4° 1.5
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2028-09-10"

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"}.