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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, 01 January 2026 · astronomical night 18:41 → 06:08 (11.45 h) · Moon 97% (waxing gibbous) · weather: ERA5 history

M31M31 17:35–18:10: quality 0.1M31 18:10–18:45: quality 0.3M31 18:45–20:35: quality 0.5M31 20:35–23:30: quality 0.4M31 23:30–00:35: quality 0.3M31 00:35–01:00: quality 0.2observe M31 20:40–21:55M42M42 19:25–19:30: quality 0.1M42 19:30–00:45: quality 0.2M42 00:45–02:10: quality 0.3M42 02:10–03:00: quality 0.2M45M45 17:35–18:10: quality 0.1M45 18:10–18:45: quality 0.2M45 18:45–21:40: quality 0.3M45 21:40–01:35: quality 0.2M45 01:35–02:10: quality 0.3M45 02:10–03:00: quality 0.2NGC 7000NGC 7000 17:35–18:10: quality 0.1NGC 7000 18:10–18:45: quality 0.3NGC 7000 18:45–20:15: quality 0.6NGC 7000 20:15–20:45: quality 0.5NGC 7000 20:45–21:10: quality 0.4NGC 7000 21:10–21:30: quality 0.3observe NGC 7000 19:25–20:40V1057 CygV1057 Cyg 17:35–18:10: quality 0.1V1057 Cyg 18:10–18:45: quality 0.3V1057 Cyg 18:45–20:15: quality 0.6V1057 Cyg 20:15–20:45: quality 0.5V1057 Cyg 20:45–21:10: quality 0.4V1057 Cyg 21:10–21:30: quality 0.3observe V1057 Cyg 18:10–19:25M33M33 17:35–18:10: quality 0.1M33 18:10–18:45: quality 0.2M33 18:45–18:55: quality 0.5M33 18:55–19:00: quality 0.4M33 19:00–19:10: quality 0.5M33 19:10–22:10: quality 0.4M33 22:10–00:35: quality 0.3M33 00:35–01:10: quality 0.2observe M33 21:55–00:15scheduleV1057 CygNGC 7000M31M3318:0020:0022:0000:0002:0004:0006:00

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
17:00–18:10 — nothing worth pointing at — 1.17
18:10–19:25 V1057 Cyg 1.25 0.48
19:25–20:40 NGC 7000 1.25 0.56
20:40–21:55 M31 1.25 0.43
21:55–00:15 M33 2.33 0.32
00:15–07:50 — nothing worth pointing at — 7.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 34 34 18:45–00:15 (marginal) 89.7° at 18:20 56.7° 1.25
M42 Great Orion Nebula 12 12 — 42.9° at 23:10 33.7° 0.0
M45 Seven Sisters 20 20 18:45–20:05 (marginal) 72.5° at 21:25 21.0° 0.0
NGC 7000 North America Nebula 27 27 18:45–19:25 (good) 87.3° at 14:35 91.8° 1.25
V1057 Cyg 27 27 18:45–19:25 (good) 87.3° at 14:35 91.8° 1.25
M33 Triangulum Pinwheel 29 29 18:45–00:15 (marginal) 79.1° at 19:10 48.4° 2.33

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-01-01"

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"}.