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, 14 April 2026 · astronomical night 21:40 → 05:01 (7.35 h) · Moon 9% (waning 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
20:00–02:00	— nothing worth pointing at —	6.0
02:00–02:35	NGC 7000	0.58	0.5
02:35–03:00	V1057 Cyg	0.42	0.67
03:00–06:45	— nothing worth pointing at —	3.75

Targets

target	astronomy	overall	best window	highest	Moon sep.	scheduled h
M31 Andromeda Galaxy	0	0	—	89.7° at 12:35	47.3°	0.0
M42 Great Orion Nebula	1	0	—	42.9° at 17:25	92.4°	0.0
M45 Seven Sisters	1	0	—	72.5° at 15:40	68.8°	0.0
NGC 7000 North America Nebula	64	13	02:35–03:00 (good)	87.2° at 08:45	57.1°	0.58
V1057 Cyg	64	13	02:35–03:00 (good)	87.3° at 08:45	57.0°	0.42
M33 Triangulum Pinwheel	0	0	—	79.1° at 13:25	45.3°	0.0

Left out

M31 — Overcast (≥80 % cloud) for 7.7 of 9.8 dark hours — the sky is closed whatever the geometry says.
M42 — Overcast (≥80 % cloud) for 7.7 of 9.8 dark hours — the sky is closed whatever the geometry says.
M45 — Overcast (≥80 % cloud) for 7.7 of 9.8 dark hours — the sky is closed whatever the geometry says.
M33 — Overcast (≥80 % cloud) for 7.7 of 9.8 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=2026-04-14"

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"}.