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, 29 August 2026 · astronomical night 21:38 → 05:05 (7.44 h) · Moon 97% (waning gibbous) · 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
19:55–21:40	— nothing worth pointing at —	1.75
21:40–22:15	NGC 7000	0.58	0.52
22:15–22:50	V1057 Cyg	0.58	0.45
22:50–23:00	M31	0.17	0.33
23:00–06:45	— nothing worth pointing at —	7.75

Targets

target	astronomy	overall	best window	highest	Moon sep.	scheduled h
M31 Andromeda Galaxy	38	6	21:40–23:00 (marginal)	89.5° at 03:30	41.9°	0.17
M42 Great Orion Nebula	4	0	—	42.9° at 08:25	87.1°	0.0
M45 Seven Sisters	28	0	—	72.5° at 06:35	62.0°	0.0
NGC 7000 North America Nebula	64	13	21:40–23:00 (marginal)	87.2° at 23:50	56.9°	0.58
V1057 Cyg	64	13	21:40–23:00 (marginal)	87.3° at 23:50	56.8°	0.58
M33 Triangulum Pinwheel	28	1	—	79.1° at 04:25	38.7°	0.0

Left out

M42 — Overcast (≥80 % cloud) for 7.3 of 9.8 dark hours — the sky is closed whatever the geometry says.
M45 — Overcast (≥80 % cloud) for 7.3 of 9.8 dark hours — the sky is closed whatever the geometry says.
M33 — Overcast (≥80 % cloud) for 7.3 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=2026-08-29"

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"}; an unreadable date → 400 {"error", "code": "invalid_date"}.