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, 26 September 2026 · astronomical night 20:44 → 05:40 (8.94 h) · Moon 100% (full moon) · weather: ERA5 history

Faded bands: each target's own windows (green good, amber marginal, pink poor). Dark blue: the schedule. Grey columns: twilight.

Schedule

local	target	hours	mean quality
19:10–07:15	— nothing worth pointing at —	12.08

Targets

target	astronomy	best window	highest	Moon sep.
M31 Andromeda Galaxy	38	—	89.5° at 01:40	36.1°
M42 Great Orion Nebula	25	—	42.9° at 06:35	79.6°
M45 Seven Sisters	41	—	72.5° at 04:45	53.0°
NGC 7000 North America Nebula	59	—	87.2° at 22:00	58.5°
V1057 Cyg	59	—	87.3° at 22:00	58.4°
M33 Triangulum Pinwheel	32	—	79.1° at 02:35	30.6°

Left out

M31 — Overcast (≥80 % cloud) for 11.2 of 11.2 dark hours — the sky is closed whatever the geometry says.
M42 — Overcast (≥80 % cloud) for 11.2 of 11.2 dark hours — the sky is closed whatever the geometry says.
M45 — Overcast (≥80 % cloud) for 11.2 of 11.2 dark hours — the sky is closed whatever the geometry says.
NGC 7000 — Overcast (≥80 % cloud) for 11.2 of 11.2 dark hours — the sky is closed whatever the geometry says.
V1057 Cyg — Overcast (≥80 % cloud) for 11.2 of 11.2 dark hours — the sky is closed whatever the geometry says.
M33 — Overcast (≥80 % cloud) for 11.2 of 11.2 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=2026-09-26"

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"}.