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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.

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Night of Thursday, 03 September 2026 · astronomical night 21:28 → 05:12 (7.72 h) · Moon 55% (waning gibbous) · weather: ERA5 history

M31M31 19:50–20:35: unusableM31 20:35–21:15: poorM31 21:15–21:30: marginalM31 21:30–23:00: goodM31 23:00–00:00: marginalM31 00:00–03:00: goodM31 03:00–05:15: marginalM31 05:15–06:25: poorM31 06:25–06:50: unusableobserve M31 23:45–01:10M42M42 19:50–04:20: unusableM42 04:20–04:50: poorM42 04:50–05:15: marginalM42 05:15–06:25: poorM42 06:25–06:50: unusableobserve M42 04:50–05:15M45M45 19:50–00:45: unusableM45 00:45–05:15: marginalM45 05:15–06:25: poorM45 06:25–06:50: unusableobserve M45 02:35–04:50NGC 7000NGC 7000 19:50–20:20: unusableNGC 7000 20:20–20:55: poorNGC 7000 20:55–21:30: marginalNGC 7000 21:30–04:00: goodNGC 7000 04:00–05:15: marginalNGC 7000 05:15–06:25: poorNGC 7000 06:25–06:50: unusableobserve NGC 7000 20:55–22:20V1057 CygV1057 Cyg 19:50–20:20: unusableV1057 Cyg 20:20–20:55: poorV1057 Cyg 20:55–21:30: marginalV1057 Cyg 21:30–04:00: goodV1057 Cyg 04:00–05:15: marginalV1057 Cyg 05:15–06:25: poorV1057 Cyg 06:25–06:50: unusableobserve V1057 Cyg 22:20–23:45M33M33 19:50–22:10: unusableM33 22:10–00:00: marginalM33 00:00–03:00: goodM33 03:00–05:15: marginalM33 05:15–06:25: poorM33 06:25–06:50: unusableobserve M33 01:10–02:35scheduleNGC 7000V1057 CygM31M33M4520:0022:0000:0002:0004:0006:00

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

Schedule

localtargethoursmean quality
19:50–20:55 — nothing worth pointing at — 1.08
20:55–22:20 NGC 7000 1.42 0.71
22:20–23:45 V1057 Cyg 1.42 0.74
23:45–01:10 M31 1.42 0.7
01:10–02:35 M33 1.42 0.65
02:35–04:50 M45 2.25 0.51
04:50–05:15 M42 0.42 0.33
05:15–06:50 — nothing worth pointing at — 1.58

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 89 78 00:00–03:00 (good) 89.5° at 03:15 45.4° 1.42
M42 Great Orion Nebula 6 5 04:50–05:15 (marginal) 42.9° at 08:05 37.6° 0.42
M45 Seven Sisters 41 36 00:45–05:15 (marginal) 72.5° at 06:15 6.5° 2.25
NGC 7000 North America Nebula 100 88 21:30–04:00 (good) 87.3° at 23:30 83.8° 1.42
V1057 Cyg 100 88 21:30–04:00 (good) 87.3° at 23:30 83.9° 1.42
M33 Triangulum Pinwheel 75 65 00:00–03:00 (good) 79.1° at 04:05 35.1° 1.42
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2026-09-03"

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"}.