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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, 20 June 2027 · astronomical night 23:10 → 03:35 (4.42 h) · Moon 97% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 01:30–01:40: quality 0.3M31 01:40–02:00: quality 0.4M31 02:00–02:20: quality 0.5M31 02:20–03:05: quality 0.6M31 03:05–03:40: quality 0.7M31 03:40–04:00: quality 0.3M31 04:00–04:30: quality 0.4M31 04:30–05:15: quality 0.1observe M31 01:40–03:10observe M31 03:40–04:10M42M45NGC 7000NGC 7000 21:35–22:20: quality 0.1NGC 7000 22:20–22:25: quality 0.3NGC 7000 22:25–22:30: quality 0.4NGC 7000 22:30–23:15: quality 0.3NGC 7000 23:15–01:10: quality 0.6NGC 7000 01:10–03:40: quality 0.7NGC 7000 03:40–04:30: quality 0.3NGC 7000 04:30–05:15: quality 0.1observe NGC 7000 22:20–22:30observe NGC 7000 22:50–00:10V1057 CygV1057 Cyg 21:35–22:20: quality 0.1V1057 Cyg 22:20–22:25: quality 0.3V1057 Cyg 22:25–22:30: quality 0.4V1057 Cyg 22:30–23:15: quality 0.3V1057 Cyg 23:15–01:15: quality 0.6V1057 Cyg 01:15–03:40: quality 0.7V1057 Cyg 03:40–04:30: quality 0.3V1057 Cyg 04:30–05:15: quality 0.1observe V1057 Cyg 00:10–01:40M33M33 03:05–03:10: quality 0.3M33 03:10–03:25: quality 0.4M33 03:25–03:40: quality 0.5M33 03:40–04:30: quality 0.3M33 04:30–05:15: quality 0.1observe M33 03:10–03:40observe M33 04:10–04:30scheduleNGC 7000V1057 CygM31M33M3122:0000:0002:0004:00

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
20:55–22:20 — nothing worth pointing at — 1.42
22:20–22:30 NGC 7000 0.17 0.35
22:30–22:50 — nothing worth pointing at — 0.33
22:50–00:10 NGC 7000 1.33 0.52
00:10–01:40 V1057 Cyg 1.5 0.64
01:40–03:10 M31 1.5 0.54
03:10–03:40 M33 0.5 0.44
03:40–04:10 M31 0.5 0.35
04:10–04:30 M33 0.33 0.33
04:30–05:50 — nothing worth pointing at — 1.33

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 27 unknown 02:30–03:40 (good) 89.6° at 08:10 97.3° 2.0
M42 Great Orion Nebula 0 unknown — 42.9° at 13:05 139.7° 0.0
M45 Seven Sisters 0 unknown — 72.5° at 11:10 129.5° 0.0
NGC 7000 North America Nebula 59 unknown 23:15–03:40 (good) 87.3° at 04:25 71.2° 1.5
V1057 Cyg 59 unknown 23:15–03:40 (good) 87.3° at 04:25 71.1° 1.5
M33 Triangulum Pinwheel 8 unknown 03:05–03:40 (marginal) 79.1° at 09:00 102.8° 0.83

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-06-20"

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"}.