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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 Sunday, 08 February 2026 · astronomical night 19:19 → 05:50 (10.51 h) · Moon 56% (waning gibbous) · weather: ERA5 history

M31M31 18:15–18:50: quality 0.1M31 18:50–19:00: quality 0.4M31 19:00–19:20: quality 0.3M31 19:20–20:00: quality 0.6M31 21:00–21:40: quality 0.4M31 21:40–22:00: quality 0.3M31 22:00–22:25: quality 0.2M31 22:25–22:30: quality 0.1observe M31 19:45–20:00observe M31 21:00–21:40M42M42 18:15–18:50: quality 0.1M42 18:50–19:20: quality 0.3M42 19:20–20:00: quality 0.6M42 21:00–22:00: quality 0.4M42 22:00–23:00: quality 0.3M42 23:00–23:35: quality 0.4M42 23:35–00:00: quality 0.3observe M42 23:00–23:55M45M45 18:15–18:50: quality 0.1M45 18:50–19:00: quality 0.4M45 19:00–19:20: quality 0.3M45 19:20–20:00: quality 0.7M45 21:00–21:45: quality 0.5M45 21:45–22:00: quality 0.4M45 22:00–23:00: quality 0.3M45 23:00–23:45: quality 0.4M45 23:45–00:00: quality 0.3observe M45 21:40–22:15observe M45 23:55–00:00NGC 7000NGC 7000 18:15–18:50: quality 0.1NGC 7000 18:50–19:00: quality 0.2V1057 CygV1057 Cyg 18:15–18:50: quality 0.1V1057 Cyg 18:50–19:00: quality 0.2M33M33 18:15–18:50: quality 0.1M33 18:50–19:00: quality 0.4M33 19:00–19:20: quality 0.3M33 19:20–20:00: quality 0.6M33 21:00–21:55: quality 0.4M33 21:55–22:00: quality 0.3M33 22:00–22:35: quality 0.2M33 22:35–22:40: quality 0.1observe M33 18:50–19:45scheduleM33M4218:0020:0022:0000:0002:0004:0006:00

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
17:45–18:50 — nothing worth pointing at — 1.08
18:50–19:45 M33 0.92 0.48
19:45–20:00 M31 0.25 0.59
20:00–21:00 — nothing worth pointing at — 1.0
21:00–21:40 M31 0.67 0.38
21:40–22:15 M45 0.58 0.39
22:15–23:00 — nothing worth pointing at — 0.75
23:00–23:55 M42 0.92 0.36
23:55–00:00 M45 0.08 0.3
00:00–07:25 — nothing worth pointing at — 7.42

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 66 25 19:20–19:45 (good) 89.7° at 15:50 147.8° 0.92
M42 Great Orion Nebula 89 33 21:00–22:00 (marginal) 42.9° at 20:40 129.6° 0.92
M45 Seven Sisters 100 37 19:20–20:00 (good) 72.5° at 18:55 164.0° 0.67
NGC 7000 North America Nebula 9 1 — 87.2° at 12:05 107.6° 0.0
V1057 Cyg 9 1 — 87.3° at 12:05 107.6° 0.0
M33 Triangulum Pinwheel 74 28 19:20–20:00 (good) 79.1° at 16:40 162.1° 0.92

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-02-08"

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"}.