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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, 27 February 2027 · astronomical night 19:40 → 05:25 (9.75 h) · Moon 53% (last quarter) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 18:40–19:10: quality 0.1M31 19:10–19:45: quality 0.4M31 19:45–20:20: quality 0.8M31 20:20–20:35: quality 0.7M31 20:35–20:55: quality 0.6M31 20:55–21:10: quality 0.5M31 21:10–21:20: quality 0.4M42M42 18:40–19:10: quality 0.1M42 19:10–19:45: quality 0.4M42 19:45–21:15: quality 0.9M42 21:15–22:25: quality 0.8M42 22:25–22:40: quality 0.7M42 22:40–22:55: quality 0.6M42 22:55–23:10: quality 0.5M42 23:10–23:20: quality 0.4observe M42 21:20–23:20M45M45 18:40–19:10: quality 0.2M45 19:10–19:45: quality 0.5M45 19:45–20:25: quality 1.0M45 20:25–21:45: quality 0.9M45 21:45–22:30: quality 0.8M45 22:30–22:45: quality 0.7M45 22:45–23:00: quality 0.6M45 23:00–23:10: quality 0.5M45 23:10–23:20: quality 0.4observe M45 19:10–20:15NGC 7000NGC 7000 04:00–04:20: quality 0.4NGC 7000 04:20–04:35: quality 0.5NGC 7000 04:35–04:55: quality 0.6NGC 7000 04:55–05:30: quality 0.7NGC 7000 05:30–06:00: quality 0.4NGC 7000 06:00–06:35: quality 0.1observe NGC 7000 04:00–05:05V1057 CygV1057 Cyg 04:00–04:20: quality 0.4V1057 Cyg 04:20–04:40: quality 0.5V1057 Cyg 04:40–04:55: quality 0.6V1057 Cyg 04:55–05:30: quality 0.7V1057 Cyg 05:30–06:00: quality 0.4V1057 Cyg 06:00–06:35: quality 0.1observe V1057 Cyg 05:05–06:00M33M33 18:40–19:10: quality 0.1M33 19:10–19:45: quality 0.4M33 19:45–19:50: quality 0.9M33 19:50–20:40: quality 0.8M33 20:40–20:55: quality 0.7M33 20:55–21:05: quality 0.6M33 21:05–21:20: quality 0.5M33 21:20–21:30: quality 0.4observe M33 20:15–21:20scheduleM45M33M42NGC 7000V1057 Cyg20:0022:0000:0002:0004:0006:00

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
18:05–19:10 — nothing worth pointing at — 1.08
19:10–20:15 M45 1.08 0.72
20:15–21:20 M33 1.08 0.68
21:20–23:20 M42 2.0 0.7
23:20–04:00 — nothing worth pointing at — 4.67
04:00–05:05 NGC 7000 1.08 0.53
05:05–06:00 V1057 Cyg 0.92 0.53
06:00–07:00 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 28 unknown 19:45–20:45 (good) 89.6° at 14:35 134.7° 0.0
M42 Great Orion Nebula 69 unknown 19:45–22:45 (good) 42.9° at 19:30 142.5° 2.0
M45 Seven Sisters 82 unknown 19:45–22:50 (good) 72.5° at 17:40 173.7° 1.08
NGC 7000 North America Nebula 20 unknown 04:45–05:30 (good) 87.3° at 10:50 96.1° 1.08
V1057 Cyg 20 unknown 04:45–05:30 (good) 87.3° at 10:50 96.1° 0.92
M33 Triangulum Pinwheel 33 unknown 19:45–21:00 (good) 79.1° at 15:30 145.1° 1.08

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-02-27"

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"}.