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 Tuesday, 29 September 2026 · astronomical night 20:39 → 05:43 (9.08 h) · Moon 87% (waning gibbous) · 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
19:05–07:20	— nothing worth pointing at —	12.25

Targets

target	astronomy	best window	highest	Moon sep.
M31 Andromeda Galaxy	55	—	89.7° at 01:30	34.2°
M42 Great Orion Nebula	12	—	42.9° at 06:20	47.3°
M45 Seven Sisters	20	—	72.5° at 04:35	11.2°
NGC 7000 North America Nebula	78	—	87.2° at 21:45	74.6°
V1057 Cyg	78	—	87.3° at 21:45	74.6°
M33 Triangulum Pinwheel	43	—	79.1° at 02:20	20.7°

Left out

M31 — Overcast (≥80 % cloud) for 11.3 of 11.3 dark hours — the sky is closed whatever the geometry says.
M42 — Overcast (≥80 % cloud) for 11.3 of 11.3 dark hours — the sky is closed whatever the geometry says.
M45 — Overcast (≥80 % cloud) for 11.3 of 11.3 dark hours — the sky is closed whatever the geometry says.
NGC 7000 — Overcast (≥80 % cloud) for 11.3 of 11.3 dark hours — the sky is closed whatever the geometry says.
V1057 Cyg — Overcast (≥80 % cloud) for 11.3 of 11.3 dark hours — the sky is closed whatever the geometry says.
M33 — Overcast (≥80 % cloud) for 11.3 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=2026-09-29"

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"}.