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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, 20 December 2040 · astronomical night 18:33 → 06:04 (11.51 h) · Moon 94% (waning gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:25–18:00: quality 0.2M31 18:00–18:35: quality 0.5M31 18:35–20:30: quality 0.8M31 20:30–22:35: quality 0.7M31 22:35–00:05: quality 0.6M31 00:05–01:00: quality 0.5M31 01:00–01:25: quality 0.4M31 01:25–01:50: quality 0.3observe M31 21:10–22:45M42M42 20:15–20:50: quality 0.3M42 20:50–00:20: quality 0.4M42 00:20–03:05: quality 0.3M42 03:05–03:50: quality 0.2observe M42 01:55–02:25M45M45 17:25–18:00: quality 0.1M45 18:00–18:35: quality 0.4M45 18:35–21:55: quality 0.6M45 21:55–00:25: quality 0.5M45 00:25–02:50: quality 0.4M45 02:50–03:25: quality 0.3M45 03:25–03:50: quality 0.2observe M45 00:20–01:55observe M45 02:25–03:10NGC 7000NGC 7000 17:25–18:00: quality 0.2NGC 7000 18:00–18:35: quality 0.5NGC 7000 18:35–18:45: quality 0.9NGC 7000 18:45–20:00: quality 0.8NGC 7000 20:00–21:15: quality 0.7NGC 7000 21:15–21:30: quality 0.6NGC 7000 21:30–21:50: quality 0.5NGC 7000 21:50–22:15: quality 0.4NGC 7000 22:15–22:20: quality 0.3observe NGC 7000 19:35–21:10V1057 CygV1057 Cyg 17:25–18:00: quality 0.2V1057 Cyg 18:00–18:35: quality 0.5V1057 Cyg 18:35–18:45: quality 0.9V1057 Cyg 18:45–20:00: quality 0.8V1057 Cyg 20:00–21:15: quality 0.7V1057 Cyg 21:15–21:30: quality 0.6V1057 Cyg 21:30–21:50: quality 0.5V1057 Cyg 21:50–22:10: quality 0.4V1057 Cyg 22:10–22:15: quality 0.3observe V1057 Cyg 18:00–19:35M33M33 17:25–17:40: quality 0.1M33 17:40–18:00: quality 0.2M33 18:00–18:35: quality 0.5M33 18:35–20:00: quality 0.8M33 20:00–22:35: quality 0.7M33 22:35–00:00: quality 0.6M33 00:00–01:10: quality 0.5M33 01:10–01:35: quality 0.4M33 01:35–01:55: quality 0.3M33 01:55–02:00: quality 0.2observe M33 22:45–00:20scheduleV1057 CygNGC 7000M31M33M4518:0020:0022:0000:0002:0004:0006:00

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 V1057 Cyg 1.58 0.7
19:35–21:10 NGC 7000 1.58 0.73
21:10–22:45 M31 1.58 0.69
22:45–00:20 M33 1.58 0.58
00:20–01:55 M45 1.58 0.42
01:55–02:25 M42 0.5 0.3
02:25–03:10 M45 0.75 0.34
03:10–07:45 — nothing worth pointing at — 4.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 81 unknown 18:35–23:15 (good) 89.7° at 19:05 86.3° 1.58
M42 Great Orion Nebula 27 unknown 20:30–02:25 (marginal) 42.9° at 00:00 46.2° 0.5
M45 Seven Sisters 63 unknown 18:35–20:50 (good) 72.5° at 22:10 56.5° 2.33
NGC 7000 North America Nebula 62 unknown 18:35–21:20 (good) 87.2° at 15:20 108.9° 1.58
V1057 Cyg 62 unknown 18:35–21:20 (good) 87.2° at 15:20 109.0° 1.58
M33 Triangulum Pinwheel 79 unknown 18:35–23:15 (good) 79.2° at 19:55 82.1° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2040-12-20"

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"}.