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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, 11 December 2027 · astronomical night 18:30 → 05:58 (11.46 h) · Moon 96% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:25–18:00: quality 0.1M31 18:00–18:35: quality 0.2M31 18:35–20:20: quality 0.4M31 20:20–01:45: quality 0.3M31 01:45–02:25: quality 0.2observe M31 21:10–23:10M42M42 20:50–20:55: quality 0.1M42 20:55–21:45: quality 0.2M42 21:45–01:40: quality 0.3M42 01:40–03:40: quality 0.4M42 03:40–04:15: quality 0.3M42 04:15–04:25: quality 0.2observe M42 23:45–01:20observe M42 03:50–04:00M45M45 18:00–18:35: quality 0.2M45 18:35–04:10: quality 0.3M45 04:10–04:25: quality 0.2observe M45 01:20–03:50NGC 7000NGC 7000 17:25–18:00: quality 0.1NGC 7000 18:00–18:35: quality 0.3NGC 7000 18:35–20:10: quality 0.6NGC 7000 20:10–21:50: quality 0.5NGC 7000 21:50–22:20: quality 0.4NGC 7000 22:20–22:50: quality 0.3NGC 7000 22:50–22:55: quality 0.2observe NGC 7000 18:00–19:35V1057 CygV1057 Cyg 17:25–18:00: quality 0.1V1057 Cyg 18:00–18:35: quality 0.3V1057 Cyg 18:35–20:10: quality 0.6V1057 Cyg 20:10–21:50: quality 0.5V1057 Cyg 21:50–22:20: quality 0.4V1057 Cyg 22:20–22:50: quality 0.3V1057 Cyg 22:50–22:55: quality 0.2observe V1057 Cyg 19:35–21:10M33M33 17:25–18:00: quality 0.1M33 18:00–18:35: quality 0.2M33 18:35–19:00: quality 0.4M33 19:00–23:25: quality 0.3M33 23:25–00:10: quality 0.2M33 00:10–01:50: quality 0.3M33 01:50–02:35: quality 0.2scheduleNGC 7000V1057 CygM31M42M4518:0020:0022:0000:0002:0004:0006:00

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
16:50–18:00 — nothing worth pointing at — 1.17
18:00–19:35 NGC 7000 1.58 0.51
19:35–21:10 V1057 Cyg 1.58 0.54
21:10–23:10 M31 2.0 0.31
23:10–23:45 — nothing worth pointing at — 0.58
23:45–01:20 M42 1.58 0.32
01:20–03:50 M45 2.5 0.33
03:50–04:00 M42 0.17 0.31
04:00–07:40 — nothing worth pointing at — 3.67

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 28 unknown 18:35–23:10 (marginal) 89.7° at 19:45 39.2° 2.0
M42 Great Orion Nebula 23 unknown 23:45–04:00 (marginal) 42.9° at 00:35 41.9° 1.75
M45 Seven Sisters 26 unknown 01:05–03:50 (marginal) 72.5° at 22:50 3.1° 2.5
NGC 7000 North America Nebula 39 unknown 18:35–19:20 (good) 87.3° at 16:00 79.2° 1.58
V1057 Cyg 39 unknown 18:35–19:20 (good) 87.3° at 16:00 79.2° 1.58
M33 Triangulum Pinwheel 21 unknown 18:35–20:05 (marginal) 79.1° at 20:35 27.1° 0.0

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-12-11"

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"}.