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, 23 February 2026 · astronomical night 19:36 → 05:31 (9.91 h) · Moon 43% (waxing crescent) · 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
18:00–05:00	— nothing worth pointing at —	11.0
05:00–05:35	NGC 7000	0.58	0.35
05:35–07:05	— nothing worth pointing at —	1.5

Targets

target	astronomy	overall	best window	highest	Moon sep.	scheduled h
M31 Andromeda Galaxy	18	3	—	89.6° at 14:50	39.5°	0.0
M42 Great Orion Nebula	40	3	—	42.9° at 19:45	41.7°	0.0
M45 Seven Sisters	44	3	—	72.5° at 17:55	2.3°	0.0
NGC 7000 North America Nebula	23	6	05:00–05:35 (marginal)	87.3° at 11:05	79.3°	0.58
V1057 Cyg	23	6	05:00–05:35 (marginal)	87.3° at 11:05	79.3°	0.0
M33 Triangulum Pinwheel	19	3	—	79.1° at 15:45	27.7°	0.0

Left out

M31 — Overcast (≥80 % cloud) for 9.7 of 12.1 dark hours — the sky is closed whatever the geometry says.
M42 — Overcast (≥80 % cloud) for 9.7 of 12.1 dark hours — the sky is closed whatever the geometry says.
M45 — Overcast (≥80 % cloud) for 9.7 of 12.1 dark hours — the sky is closed whatever the geometry says.
V1057 Cyg — its best window (05:00–05:35) is outranked by NGC 7000
M33 — Overcast (≥80 % cloud) for 9.7 of 12.1 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=2026-02-23"

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"}.