IT Consulting

← single target

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.

Try: an autumn deep-sky night  ·  ← previous night · next night →

Night of Friday, 09 January 2026 · astronomical night 18:47 → 06:08 (11.34 h) · Moon 57% (waning gibbous) · weather: ERA5 history

M31M31 17:40–18:15: quality 0.1M31 18:15–18:50: quality 0.4M31 18:50–19:00: quality 0.8M31 20:00–21:00: quality 0.6M31 21:00–22:00: quality 0.7M31 22:00–23:00: quality 0.6M31 23:00–23:35: quality 0.5M31 23:35–00:00: quality 0.4observe M31 23:00–23:50M42M42 18:55–19:00: quality 0.3M42 20:00–21:00: quality 0.5M42 21:00–21:40: quality 0.6M42 21:40–22:00: quality 0.7M42 22:00–23:00: quality 0.6M42 23:00–00:00: quality 0.5M42 01:00–01:35: quality 0.2M42 01:35–02:00: quality 0.1observe M42 22:10–23:00M45M45 17:40–18:15: quality 0.1M45 18:15–18:50: quality 0.4M45 18:50–19:00: quality 0.8M45 20:00–21:00: quality 0.6M45 21:00–23:00: quality 0.7M45 23:00–00:00: quality 0.6M45 01:00–01:45: quality 0.2M45 01:45–02:00: quality 0.1observe M45 20:30–21:20observe M45 23:50–00:00NGC 7000NGC 7000 17:40–18:15: quality 0.1NGC 7000 18:15–18:50: quality 0.4NGC 7000 18:50–19:00: quality 0.7NGC 7000 20:00–20:25: quality 0.4NGC 7000 20:25–20:55: quality 0.3NGC 7000 20:55–21:00: quality 0.2observe NGC 7000 18:15–19:00observe NGC 7000 20:00–20:30V1057 CygV1057 Cyg 17:40–18:15: quality 0.1V1057 Cyg 18:15–18:50: quality 0.4V1057 Cyg 18:50–19:00: quality 0.7V1057 Cyg 20:00–20:25: quality 0.4V1057 Cyg 20:25–20:55: quality 0.3V1057 Cyg 20:55–21:00: quality 0.2M33M33 17:40–18:15: quality 0.1M33 18:15–18:50: quality 0.4M33 18:50–19:00: quality 0.8M33 20:00–21:00: quality 0.6M33 21:00–22:20: quality 0.7M33 22:20–23:00: quality 0.6M33 23:00–23:50: quality 0.5M33 23:50–00:00: quality 0.4observe M33 21:20–22:10scheduleM45M33M42M3118:0020:0022:0000:0002:0004:0006:00

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
17:05–18:15 — nothing worth pointing at — 1.17
18:15–19:00 NGC 7000 0.75 0.44
19:00–20:00 — nothing worth pointing at — 1.0
20:00–20:30 NGC 7000 0.5 0.39
20:30–21:20 M45 0.83 0.65
21:20–22:10 M33 0.83 0.7
22:10–23:00 M42 0.83 0.64
23:00–23:50 M31 0.83 0.47
23:50–00:00 M45 0.17 0.57
00:00–07:50 — nothing worth pointing at — 7.83

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 53 21:00–22:55 (good) 89.6° at 17:50 145.8° 0.83
M42 Great Orion Nebula 89 38 21:00–23:00 (good) 42.9° at 22:40 104.9° 0.83
M45 Seven Sisters 100 44 21:00–23:05 (good) 72.5° at 20:50 131.9° 1.0
NGC 7000 North America Nebula 41 16 18:50–19:00 (good) 87.3° at 14:05 119.6° 1.25
V1057 Cyg 41 16 18:50–19:00 (good) 87.3° at 14:05 119.6° 0.0
M33 Triangulum Pinwheel 100 52 21:00–23:00 (good) 79.1° at 18:40 153.1° 0.83

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-01-09"

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"}.