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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 Sunday, 06 September 2026 · astronomical night 21:22 → 05:16 (7.89 h) · Moon 22% (waning crescent) · weather: ERA5 history

M31M31 19:45–20:25: unusableM31 20:25–21:05: poorM31 21:05–21:25: marginalM31 21:25–05:20: goodM31 05:20–05:55: marginalM31 05:55–06:25: poorM31 06:25–06:55: unusableobserve M31 00:00–01:35M42M42 19:45–04:05: unusableM42 04:05–04:50: marginalM42 04:50–05:20: goodM42 05:20–05:55: marginalM42 05:55–06:25: poorM42 06:25–06:55: unusableobserve M42 04:45–05:55M45M45 19:45–00:30: unusableM45 00:30–01:00: marginalM45 01:00–05:20: goodM45 05:20–05:55: marginalM45 05:55–06:25: poorM45 06:25–06:55: unusableobserve M45 03:10–04:45NGC 7000NGC 7000 19:45–20:15: unusableNGC 7000 20:15–20:50: poorNGC 7000 20:50–21:25: marginalNGC 7000 21:25–05:20: goodNGC 7000 05:20–05:35: marginalNGC 7000 05:35–06:10: poorNGC 7000 06:10–06:55: unusableobserve NGC 7000 22:25–00:00V1057 CygV1057 Cyg 19:45–20:15: unusableV1057 Cyg 20:15–20:50: poorV1057 Cyg 20:50–21:25: marginalV1057 Cyg 21:25–05:20: goodV1057 Cyg 05:20–05:30: marginalV1057 Cyg 05:30–06:10: poorV1057 Cyg 06:10–06:55: unusableobserve V1057 Cyg 20:50–22:25M33M33 19:45–21:55: unusableM33 21:55–22:25: marginalM33 22:25–05:20: goodM33 05:20–05:55: marginalM33 05:55–06:25: poorM33 06:25–06:55: unusableobserve M33 01:35–03:10scheduleV1057 CygNGC 7000M31M33M45M4220:0022:0000:0002:0004:0006:00

Faded bands: each target's own windows (green good, amber marginal, pink poor). Dark blue: the schedule. Grey columns: twilight.

Schedule

localtargethoursmean quality
19:45–20:50 — nothing worth pointing at — 1.08
20:50–22:25 V1057 Cyg 1.58 0.78
22:25–00:00 NGC 7000 1.58 1.0
00:00–01:35 M31 1.58 1.0
01:35–03:10 M33 1.58 0.97
03:10–04:45 M45 1.58 0.89
04:45–05:55 M42 1.17 0.51
05:55–06:55 — nothing worth pointing at — 1.0

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 100 99 21:25–05:20 (good) 89.7° at 03:00 80.7° 1.58
M42 Great Orion Nebula 17 17 04:50–05:20 (good) 42.9° at 07:50 40.7° 1.17
M45 Seven Sisters 90 90 01:00–05:20 (good) 72.5° at 06:05 49.1° 1.58
NGC 7000 North America Nebula 100 99 21:25–05:20 (good) 87.2° at 23:15 106.9° 1.58
V1057 Cyg 100 99 21:25–05:20 (good) 87.3° at 23:15 106.9° 1.58
M33 Triangulum Pinwheel 100 100 22:25–05:20 (good) 79.1° at 03:50 75.4° 1.58
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-09-06"

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"}.