Rozhen Observation Calendar

Which nights are best for a target over the coming weeks. The astronomy mark (darkness × altitude × Moon) is computed for every night; the weather and the overall mark exist only where Open-Meteo has a forecast (the next four days) or ERA5 history (past nights) — the rest is honestly blank.

Best nights for Triangulum Pinwheel: 11-20 (100), 11-21 (100), 11-22 (100), 11-23 (100), 11-24 (100) — by astronomy; check the weather when the night is within four days.

2032-11-18astronomy score per night — click a bar for that night2032-12-17

night of	astronomy	weather	overall	best window	highest	dark h	Moon	Moon sep.
2032-11-18 Thu	61	—	unknown	18:35–19:45 (good, 1.17 h)	79.1° 22:05	11.06	97%	49.7°
2032-11-19 Fri	96	—	unknown	18:35–22:10 (good, 3.58 h)	79.1° 22:00	11.08	92%	61.7°
2032-11-20 Sat	100	—	unknown	18:35–00:55 (good, 6.33 h)	79.1° 21:55	11.11	85%	73.7°
2032-11-21 Sun	100	—	unknown	18:35–02:25 (good, 7.83 h)	79.1° 21:50	11.13	78%	85.5°
2032-11-22 Mon	100	—	unknown	18:35–03:00 (good, 8.42 h)	79.1° 21:45	11.16	69%	97.0°
2032-11-23 Tue	100	—	unknown	18:35–03:05 (good, 8.5 h)	79.1° 21:45	11.18	60%	108.3°
2032-11-24 Wed	100	—	unknown	18:35–03:05 (good, 8.5 h)	79.1° 21:40	11.2	50%	119.4°
2032-11-25 Thu	100	—	unknown	18:35–03:05 (good, 8.5 h)	79.1° 21:35	11.22	41%	130.2°
2032-11-26 Fri	100	—	unknown	18:35–03:00 (good, 8.42 h)	79.1° 21:30	11.25	32%	140.6°
2032-11-27 Sat	100	—	unknown	18:35–03:00 (good, 8.42 h)	79.1° 21:30	11.27	23%	150.2°
2032-11-28 Sun	100	—	unknown	18:35–02:55 (good, 8.33 h)	79.1° 21:25	11.29	16%	157.8°
2032-11-29 Mon	100	—	unknown	18:35–02:50 (good, 8.25 h)	79.1° 21:20	11.3	9%	160.4°
2032-11-30 Tue	100	—	unknown	18:35–02:50 (good, 8.25 h)	79.1° 21:15	11.32	4%	155.9°
2032-12-01 Wed	100	—	unknown	18:35–02:45 (good, 8.17 h)	79.1° 21:10	11.34	1%	146.8°
2032-12-02 Thu	100	—	unknown	18:35–02:40 (good, 8.08 h)	79.1° 21:10	11.36	0%	135.6°
2032-12-03 Fri	100	—	unknown	18:35–02:35 (good, 8.0 h)	79.1° 21:05	11.37	2%	123.4°
2032-12-04 Sat	100	—	unknown	18:35–02:30 (good, 7.92 h)	79.1° 21:00	11.39	5%	110.6°
2032-12-05 Sun	100	—	unknown	18:35–02:30 (good, 7.92 h)	79.1° 20:55	11.4	11%	97.5°
2032-12-06 Mon	100	—	unknown	18:35–02:25 (good, 7.83 h)	79.1° 20:50	11.41	20%	84.3°
2032-12-07 Tue	100	—	unknown	18:35–02:20 (good, 7.75 h)	79.1° 20:50	11.43	29%	71.0°
2032-12-08 Wed	99	—	unknown	18:35–02:15 (good, 7.67 h)	79.1° 20:45	11.44	40%	57.8°
2032-12-09 Thu	91	—	unknown	18:35–02:15 (good, 7.67 h)	79.1° 20:40	11.45	52%	45.1°
2032-12-10 Fri	82	—	unknown	21:25–02:10 (good, 4.75 h)	79.1° 20:35	11.46	63%	33.2°
2032-12-11 Sat	53	—	unknown	18:35–02:30 (marginal, 7.92 h)	79.1° 20:35	11.47	73%	23.6°
2032-12-12 Sun	36	—	unknown	18:35–02:15 (marginal, 7.67 h)	79.1° 20:30	11.48	82%	19.7°
2032-12-13 Mon	27	—	unknown	18:35–01:45 (marginal, 7.17 h)	79.1° 20:25	11.48	90%	24.2°
2032-12-14 Tue	27	—	unknown	18:35–21:50 (marginal, 3.25 h)	79.1° 20:20	11.49	96%	33.9°
2032-12-15 Wed	38	—	unknown	18:35–00:50 (marginal, 6.25 h)	79.1° 20:15	11.49	99%	45.3°
2032-12-16 Thu	55	—	unknown	18:35–18:50 (good, 0.25 h)	79.1° 20:15	11.5	100%	57.2°
2032-12-17 Fri	71	—	unknown	18:35–21:10 (good, 2.58 h)	79.1° 20:10	11.5	99%	69.3°

Download: CSV · JSON

💡 API

curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2032-11-18&days=30"
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&days=30&format=csv" -o m31-calendar.csv

One row per night: score_astronomy always, score_weather / score only where a forecast or history exists (null otherwise, with weather_source saying which), best window, dark hours, Moon illumination and separation, transit. 7–60 nights. Errors: 400 with invalid_date or target_unresolved. Results are cached for six hours; calculation version 2026-10-10.1.