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 Saturday, 13 December 2025 · astronomical night 18:31 → 06:00 (11.48 h) · Moon 30% (waning crescent) · weather: ERA5 history

M31M31 17:25–18:00: quality 0.1M31 18:00–18:35: quality 0.3M31 18:35–20:00: quality 0.6M31 21:00–22:00: quality 0.2M31 22:00–23:00: quality 0.3observe M31 18:00–18:35M42M42 21:00–21:25: quality 0.1M42 21:25–23:00: quality 0.2M45M45 17:30–18:00: quality 0.1M45 18:00–18:35: quality 0.3M45 18:35–18:55: quality 0.5M45 18:55–19:00: quality 0.6M45 19:00–20:00: quality 0.5M45 21:00–22:00: quality 0.2M45 22:00–23:00: quality 0.3observe M45 19:45–20:00NGC 7000NGC 7000 17:25–18:00: quality 0.1NGC 7000 18:00–18:35: quality 0.3NGC 7000 18:35–19:00: quality 0.6NGC 7000 19:00–20:00: quality 0.5NGC 7000 21:00–22:15: quality 0.2NGC 7000 22:15–22:45: quality 0.1observe NGC 7000 18:35–19:10V1057 CygV1057 Cyg 17:25–18:00: quality 0.1V1057 Cyg 18:00–18:35: quality 0.3V1057 Cyg 18:35–19:00: quality 0.6V1057 Cyg 19:00–20:00: quality 0.5V1057 Cyg 21:00–22:15: quality 0.2V1057 Cyg 22:15–22:45: quality 0.1M33M33 17:25–18:00: quality 0.1M33 18:00–18:35: quality 0.3M33 18:35–20:00: quality 0.6M33 21:00–22:00: quality 0.2M33 22:00–23:00: quality 0.3observe M33 19:10–19:45schedule18:0020:0022:0000:0002:0004:0006:00

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
18:00–18:35 M31 0.58 0.32
18:35–19:10 NGC 7000 0.58 0.6
19:10–19:45 M33 0.58 0.56
19:45–20:00 M45 0.25 0.52
20:00–07:45 — nothing worth pointing at — 11.75

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 21 18:35–19:00 (good) 89.7° at 19:35 147.2° 0.58
M42 Great Orion Nebula 89 6 — 42.9° at 00:25 108.1° 0.0
M45 Seven Sisters 100 15 18:35–20:00 (marginal) 72.5° at 22:40 135.6° 0.25
NGC 7000 North America Nebula 95 33 18:35–19:00 (good) 87.3° at 15:50 118.3° 0.58
V1057 Cyg 95 33 18:35–19:00 (good) 87.3° at 15:50 118.4° 0.0
M33 Triangulum Pinwheel 100 20 18:35–19:00 (good) 79.1° at 20:25 155.8° 0.58

Left out

💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-12-13"

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"}.