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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, 22 July 2027 · astronomical night 22:48 → 04:07 (5.31 h) · Moon 84% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 23:25–23:50: quality 0.3M31 23:50–00:15: quality 0.4M31 00:15–04:10: quality 0.5M31 04:10–04:55: quality 0.3M31 04:55–05:35: quality 0.1observe M31 00:35–01:50M42M45M45 03:35–03:50: quality 0.3M45 03:50–04:10: quality 0.4M45 04:10–04:25: quality 0.2M45 04:25–04:55: quality 0.3M45 04:55–05:35: quality 0.1observe M45 03:40–04:10NGC 7000NGC 7000 21:25–22:05: quality 0.1NGC 7000 22:05–22:10: quality 0.4NGC 7000 22:10–22:40: quality 0.5NGC 7000 22:40–22:50: quality 0.3NGC 7000 22:50–00:25: quality 0.7NGC 7000 00:25–04:05: quality 0.6NGC 7000 04:05–04:10: quality 0.5NGC 7000 04:10–04:55: quality 0.3NGC 7000 04:55–05:35: quality 0.1observe NGC 7000 22:05–23:20V1057 CygV1057 Cyg 21:25–22:05: quality 0.1V1057 Cyg 22:05–22:10: quality 0.4V1057 Cyg 22:10–22:40: quality 0.5V1057 Cyg 22:40–22:50: quality 0.3V1057 Cyg 22:50–00:25: quality 0.7V1057 Cyg 00:25–04:05: quality 0.6V1057 Cyg 04:05–04:10: quality 0.5V1057 Cyg 04:10–04:55: quality 0.3V1057 Cyg 04:55–05:35: quality 0.1observe V1057 Cyg 23:20–00:35M33M33 01:00–01:25: quality 0.3M33 01:25–01:55: quality 0.4M33 01:55–04:10: quality 0.5M33 04:10–04:55: quality 0.3M33 04:55–05:35: quality 0.1observe M33 01:50–03:40scheduleNGC 7000V1057 CygM31M3322:0000:0002:0004:0006:00

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
20:45–22:05 — nothing worth pointing at — 1.33
22:05–23:20 NGC 7000 1.25 0.53
23:20–00:35 V1057 Cyg 1.25 0.67
00:35–01:50 M31 1.25 0.5
01:50–03:40 M33 1.83 0.47
03:40–04:10 M45 0.5 0.36
04:10–06:10 — nothing worth pointing at — 2.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 34 unknown 23:35–04:10 (marginal) 89.5° at 06:05 49.0° 1.25
M42 Great Orion Nebula 0 unknown — 42.9° at 10:55 97.1° 0.0
M45 Seven Sisters 5 unknown 03:40–04:10 (marginal) 72.5° at 09:05 73.1° 0.5
NGC 7000 North America Nebula 68 unknown 22:50–01:45 (good) 87.2° at 02:20 54.7° 1.25
V1057 Cyg 68 unknown 22:50–01:45 (good) 87.3° at 02:20 54.7° 1.25
M33 Triangulum Pinwheel 20 unknown 01:15–04:10 (marginal) 79.1° at 06:55 48.4° 1.83

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-07-22"

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"}.