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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 Saturday, 18 September 2038 · astronomical night 20:59 → 05:31 (8.53 h) · Moon 75% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 19:55–20:30: quality 0.1M31 20:30–21:00: quality 0.4M31 21:00–21:25: quality 0.8M31 21:25–22:10: quality 0.9M31 22:10–00:05: quality 0.7M31 00:05–02:30: quality 0.6M31 02:30–05:35: quality 0.5M31 05:35–06:05: quality 0.2M31 06:05–06:40: quality 0.1observe M31 23:40–01:15M42M42 03:20–03:40: quality 0.2M42 03:40–04:15: quality 0.3M42 04:15–05:35: quality 0.4M42 05:35–06:05: quality 0.2M42 06:05–06:40: quality 0.1observe M42 04:25–05:35M45M45 23:45–00:10: quality 0.3M45 00:10–00:40: quality 0.4M45 00:40–03:30: quality 0.5M45 03:30–05:35: quality 0.4M45 05:35–06:05: quality 0.2M45 06:05–06:40: quality 0.1observe M45 02:50–04:25NGC 7000NGC 7000 19:55–20:30: quality 0.2NGC 7000 20:30–21:00: quality 0.5NGC 7000 21:00–22:10: quality 1.0NGC 7000 22:10–01:30: quality 0.8NGC 7000 01:30–02:55: quality 0.7NGC 7000 02:55–04:20: quality 0.6NGC 7000 04:20–04:45: quality 0.5NGC 7000 04:45–05:10: quality 0.4NGC 7000 05:10–05:25: quality 0.3observe NGC 7000 20:30–22:05V1057 CygV1057 Cyg 19:55–20:30: quality 0.2V1057 Cyg 20:30–21:00: quality 0.5V1057 Cyg 21:00–22:10: quality 1.0V1057 Cyg 22:10–01:30: quality 0.8V1057 Cyg 01:30–02:55: quality 0.7V1057 Cyg 02:55–04:20: quality 0.6V1057 Cyg 04:20–04:45: quality 0.5V1057 Cyg 04:45–05:10: quality 0.4V1057 Cyg 05:10–05:25: quality 0.3observe V1057 Cyg 22:05–23:40M33M33 21:10–21:15: quality 0.4M33 21:15–21:30: quality 0.5M33 21:30–21:45: quality 0.6M33 21:45–22:00: quality 0.7M33 22:00–22:10: quality 0.8M33 22:10–01:05: quality 0.6M33 01:05–03:55: quality 0.5M33 03:55–05:35: quality 0.4M33 05:35–06:05: quality 0.2M33 06:05–06:40: quality 0.1observe M33 01:15–02:50scheduleNGC 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
19:25–20:30 — nothing worth pointing at — 1.08
20:30–22:05 NGC 7000 1.58 0.84
22:05–23:40 V1057 Cyg 1.58 0.84
23:40–01:15 M31 1.58 0.63
01:15–02:50 M33 1.58 0.51
02:50–04:25 M45 1.58 0.45
04:25–05:35 M42 1.17 0.38
05:35–07:10 — nothing worth pointing at — 1.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 90 unknown 21:00–01:10 (good) 89.7° at 02:15 45.1° 1.58
M42 Great Orion Nebula 9 unknown 03:55–05:35 (marginal) 42.9° at 07:05 36.2° 1.17
M45 Seven Sisters 30 unknown 00:00–05:35 (marginal) 72.5° at 05:15 8.4° 1.58
NGC 7000 North America Nebula 100 unknown 21:00–03:45 (good) 87.2° at 22:30 85.5° 1.58
V1057 Cyg 100 unknown 21:00–03:45 (good) 87.3° at 22:30 85.5° 1.58
M33 Triangulum Pinwheel 80 unknown 21:40–22:10 (good) 79.2° at 03:05 31.7° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2038-09-18"

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"}.