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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 Thursday, 13 May 2027 · astronomical night 22:26 → 04:08 (5.7 h) · Moon 58% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 04:00–04:10: quality 0.4M31 04:10–04:20: quality 0.2M31 04:20–04:50: quality 0.3M31 04:50–04:55: quality 0.4M31 04:55–05:35: quality 0.1observe M31 04:00–04:10observe M31 04:40–04:55M42M45NGC 7000NGC 7000 00:05–00:20: quality 0.4NGC 7000 00:20–00:35: quality 0.5NGC 7000 00:35–00:55: quality 0.6NGC 7000 00:55–01:10: quality 0.7NGC 7000 01:10–02:40: quality 0.8NGC 7000 02:40–03:30: quality 0.9NGC 7000 03:30–04:10: quality 1.0NGC 7000 04:10–04:55: quality 0.5NGC 7000 04:55–05:35: quality 0.2observe NGC 7000 00:05–01:45observe NGC 7000 04:10–04:40V1057 CygV1057 Cyg 00:05–00:20: quality 0.4V1057 Cyg 00:20–00:35: quality 0.5V1057 Cyg 00:35–00:55: quality 0.6V1057 Cyg 00:55–01:10: quality 0.7V1057 Cyg 01:10–02:40: quality 0.8V1057 Cyg 02:40–03:30: quality 0.9V1057 Cyg 03:30–04:10: quality 1.0V1057 Cyg 04:10–04:55: quality 0.5V1057 Cyg 04:55–05:35: quality 0.2observe V1057 Cyg 01:45–04:00M33scheduleNGC 7000V1057 Cyg22:0000:0002:0004:0006:00

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
20:30–00:05 — nothing worth pointing at — 3.58
00:05–01:45 NGC 7000 1.67 0.63
01:45–04:00 V1057 Cyg 2.25 0.89
04:00–04:10 M31 0.17 0.42
04:10–04:40 NGC 7000 0.5 0.5
04:40–04:55 M31 0.25 0.34
04:55–06:05 — nothing worth pointing at — 1.17

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 4 unknown 04:35–04:55 (marginal) 89.5° at 10:40 119.2° 0.42
M42 Great Orion Nebula 0 unknown — 42.9° at 15:35 71.3° 0.0
M45 Seven Sisters 0 unknown — 72.5° at 13:45 92.8° 0.0
NGC 7000 North America Nebula 92 unknown 00:45–04:10 (good) 87.3° at 06:55 123.7° 2.17
V1057 Cyg 92 unknown 00:45–04:10 (good) 87.3° at 06:55 123.8° 2.25
M33 Triangulum Pinwheel 0 unknown — 79.1° at 11:30 117.9° 0.0

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-05-13"

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"}.