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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 Friday, 23 July 2027 · astronomical night 22:46 → 04:08 (5.36 h) · Moon 77% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 23:20–23:40: quality 0.3M31 23:40–00:10: quality 0.4M31 00:10–04:10: quality 0.5M31 04:10–04:55: quality 0.3M31 04:55–05:35: quality 0.1observe M31 00:35–01:50M42M45M45 03:30–03:50: quality 0.3M45 03:50–04:10: quality 0.4M45 04:10–04:45: quality 0.2M45 04:45–04:55: 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 22:05–22:50: quality 0.5NGC 7000 22:50–23:00: quality 1.0NGC 7000 23:00–01:40: quality 0.7NGC 7000 01:40–04:10: quality 0.6NGC 7000 04:10–04:55: quality 0.3NGC 7000 04:55–05:35: quality 0.1observe NGC 7000 22:05–23:20observe NGC 7000 03:05–03:40V1057 CygV1057 Cyg 21:25–22:05: quality 0.1V1057 Cyg 22:05–22:50: quality 0.5V1057 Cyg 22:50–23:00: quality 1.0V1057 Cyg 23:00–01:40: quality 0.7V1057 Cyg 01:40–04:10: quality 0.6V1057 Cyg 04:10–04:55: quality 0.3V1057 Cyg 04:55–05:35: quality 0.1observe V1057 Cyg 23:20–00:35M33M33 00:55–01:20: quality 0.3M33 01:20–01:50: quality 0.4M33 01:50–04:10: quality 0.5M33 04:10–04:55: quality 0.2M33 04:55–05:35: quality 0.1observe M33 01:50–03:05scheduleNGC 7000V1057 CygM31M33NGC 700022:0000:0002:0004:0006:00

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 0.6
23:20–00:35 V1057 Cyg 1.25 0.72
00:35–01:50 M31 1.25 0.52
01:50–03:05 M33 1.25 0.46
03:05–03:40 NGC 7000 0.58 0.6
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 23:25–04:10 (marginal) 89.6° at 06:00 40.1° 1.25
M42 Great Orion Nebula 0 unknown — 42.9° at 10:50 86.9° 0.0
M45 Seven Sisters 5 unknown 03:40–04:10 (marginal) 72.5° at 09:00 61.0° 0.5
NGC 7000 North America Nebula 96 unknown 22:50–03:20 (good) 87.3° at 02:15 55.7° 1.83
V1057 Cyg 96 unknown 22:50–03:20 (good) 87.3° at 02:15 55.6° 1.25
M33 Triangulum Pinwheel 20 unknown 01:10–04:10 (marginal) 79.1° at 06:50 37.2° 1.25

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2027-07-23"

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"}.