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 Monday, 29 September 2025 · astronomical night 20:38 → 05:44 (9.09 h) · Moon 49% (first quarter) · weather: ERA5 history

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

local	target	hours	mean quality
19:05–05:00	— nothing worth pointing at —	9.92
05:00–05:10	M33	0.17	0.3
05:10–05:45	M45	0.58	0.31
05:45–07:20	— nothing worth pointing at —	1.58

Targets

target	astronomy	overall	best window	highest	Moon sep.	scheduled h
M31 Andromeda Galaxy	100	4	—	89.7° at 01:30	110.8°	0.0
M42 Great Orion Nebula	60	7	—	42.9° at 06:20	144.0°	0.0
M45 Seven Sisters	100	6	05:00–05:45 (marginal)	72.5° at 04:35	143.7°	0.58
NGC 7000 North America Nebula	100	0	—	87.3° at 21:45	80.4°	0.0
V1057 Cyg	100	0	—	87.3° at 21:45	80.3°	0.0
M33 Triangulum Pinwheel	100	4	05:00–05:10 (marginal)	79.1° at 02:20	117.1°	0.17

Left out

M31 — Overcast (≥80 % cloud) for 9.4 of 11.3 dark hours — the sky is closed whatever the geometry says.
M42 — Overcast (≥80 % cloud) for 9.4 of 11.3 dark hours — the sky is closed whatever the geometry says.
NGC 7000 — Overcast (≥80 % cloud) for 9.4 of 11.3 dark hours — the sky is closed whatever the geometry says.
V1057 Cyg — Overcast (≥80 % cloud) for 9.4 of 11.3 dark hours — the sky is closed whatever the geometry says.

💡 API

curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2025-09-29"

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"}.