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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 Sunday, 13 January 2030 · astronomical night 18:51 → 06:07 (11.27 h) · Moon 71% (waxing gibbous) · weather: none — the schedule is astronomy only; overall conditions unknown

M31M31 17:45–18:20: quality 0.1M31 18:20–18:55: quality 0.2M31 18:55–21:55: quality 0.5M31 21:55–23:40: quality 0.4M31 23:40–00:10: quality 0.3M31 00:10–00:15: quality 0.2observe M31 20:35–21:50M42M42 18:40–18:55: quality 0.1M42 18:55–19:20: quality 0.3M42 19:20–20:45: quality 0.4M42 20:45–01:35: quality 0.5M42 01:35–02:00: quality 0.4M42 02:00–02:15: quality 0.3observe M42 21:50–23:05observe M42 02:05–02:10M45M45 17:45–18:20: quality 0.1M45 18:20–18:55: quality 0.2M45 18:55–19:30: quality 0.5M45 19:30–20:00: quality 0.4M45 20:00–01:30: quality 0.5M45 01:30–01:55: quality 0.4M45 01:55–02:15: quality 0.3observe M45 00:05–02:05NGC 7000NGC 7000 17:45–18:20: quality 0.1NGC 7000 18:20–18:55: quality 0.3NGC 7000 18:55–19:25: quality 0.6NGC 7000 19:25–20:00: quality 0.5NGC 7000 20:00–20:25: quality 0.4NGC 7000 20:25–20:45: quality 0.3NGC 7000 06:55–07:20: quality 0.1observe NGC 7000 18:20–18:25observe NGC 7000 18:55–20:05V1057 CygV1057 Cyg 17:45–18:20: quality 0.1V1057 Cyg 18:20–18:55: quality 0.3V1057 Cyg 18:55–19:25: quality 0.6V1057 Cyg 19:25–20:00: quality 0.5V1057 Cyg 20:00–20:25: quality 0.4V1057 Cyg 20:25–20:45: quality 0.3V1057 Cyg 06:55–07:20: quality 0.1observe V1057 Cyg 20:05–20:35M33M33 17:45–18:20: quality 0.1M33 18:20–18:55: quality 0.2M33 18:55–19:30: quality 0.5M33 19:30–20:00: quality 0.4M33 20:00–21:05: quality 0.5M33 21:05–23:50: quality 0.4M33 23:50–00:20: quality 0.3M33 00:20–00:25: quality 0.2observe M33 23:05–00:05scheduleNGC 7000M31M42M33M4518:0020:0022:0000:0002:0004:0006:00

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

localtargethoursmean quality
17:10–18:20 — nothing worth pointing at — 1.17
18:20–18:25 NGC 7000 0.08 0.3
18:25–18:55 — nothing worth pointing at — 0.5
18:55–20:05 NGC 7000 1.17 0.53
20:05–20:35 V1057 Cyg 0.5 0.36
20:35–21:50 M31 1.25 0.46
21:50–23:05 M42 1.25 0.5
23:05–00:05 M33 1.0 0.39
00:05–02:05 M45 2.0 0.46
02:05–02:10 M42 0.08 0.32
02:10–07:50 — nothing worth pointing at — 5.67

Targets

targetastronomyoverallbest windowhighestMoon sep.scheduled h
M31 Andromeda Galaxy 31 unknown 18:55–23:55 (marginal) 89.5° at 17:35 36.3° 1.25
M42 Great Orion Nebula 46 unknown 19:05–02:10 (marginal) 42.9° at 22:25 45.4° 1.33
M45 Seven Sisters 45 unknown 18:55–02:05 (marginal) 72.5° at 20:35 10.6° 2.0
NGC 7000 North America Nebula 16 unknown 18:55–20:35 (marginal) 87.2° at 13:50 76.7° 1.25
V1057 Cyg 16 unknown 18:55–20:35 (marginal) 87.3° at 13:50 76.7° 0.5
M33 Triangulum Pinwheel 29 unknown 18:55–00:05 (marginal) 79.1° at 18:25 22.6° 1.0
💡 API 
curl -sS "https://devops.majbase.com/rozhen-planner/plan-api?targets=M31,M42,M45,NGC%207000&date=2030-01-13"

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"}.