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, 16 February 2026 · astronomical night 19:28 → 05:40 (10.21 h) · Moon 0% (new moon) · 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
17:55–19:00	— nothing worth pointing at —	1.08
19:00–19:35	M45	0.58	0.37
19:35–20:00	M33	0.42	0.59
20:00–07:15	— nothing worth pointing at —	11.25

Targets

target	astronomy	overall	best window	highest	Moon sep.	scheduled h
M31 Andromeda Galaxy	48	11	19:30–20:00 (marginal)	89.7° at 15:20	71.3°	0.0
M42 Great Orion Nebula	86	11	19:30–20:00 (marginal)	42.9° at 20:10	116.4°	0.0
M45 Seven Sisters	100	13	19:30–20:00 (good)	72.5° at 18:20	98.3°	0.58
NGC 7000 North America Nebula	17	0	—	87.3° at 11:30	60.8°	0.0
V1057 Cyg	17	0	—	87.3° at 11:30	60.7°	0.0
M33 Triangulum Pinwheel	55	12	19:30–19:40 (good)	79.1° at 16:10	73.4°	0.42

Left out

M31 — its best window (19:30–20:00) is outranked by M33, M45
M42 — its best window (19:30–20:00) is outranked by M33, M45
NGC 7000 — Overcast (≥80 % cloud) for 10.8 of 12.4 dark hours — the sky is closed whatever the geometry says.
V1057 Cyg — Overcast (≥80 % cloud) for 10.8 of 12.4 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=2026-02-16"

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"}.