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 North America Nebula: 11-19 (100), 11-20 (100), 11-21 (100), 11-22 (100), 11-23 (100) — by astronomy; check the weather when the night is within four days.

2032-11-08astronomy score per night — click a bar for that night2032-12-07

night of	astronomy	weather	overall	best window	highest	dark h	Moon	Moon sep.
2032-11-08 Mon	93	—	unknown	18:45–00:25 (good, 5.67 h)	87.2° 18:05	10.76	33%	61.9°
2032-11-09 Tue	85	—	unknown	18:45–00:25 (good, 5.67 h)	87.2° 18:05	10.79	44%	57.0°
2032-11-10 Wed	74	—	unknown	18:45–00:00 (good, 5.25 h)	87.2° 18:00	10.83	55%	53.9°
2032-11-11 Thu	64	—	unknown	18:40–22:55 (good, 4.25 h)	87.2° 17:55	10.86	66%	53.4°
2032-11-12 Fri	52	—	unknown	18:40–18:55 (good, 0.25 h)	87.2° 17:50	10.89	77%	55.4°
2032-11-13 Sat	47	—	unknown	18:40–00:25 (marginal, 5.75 h)	87.2° 17:50	10.92	86%	59.8°
2032-11-14 Sun	47	—	unknown	18:40–18:45 (good, 0.08 h)	87.2° 17:45	10.95	93%	66.0°
2032-11-15 Mon	52	—	unknown	18:40–19:55 (good, 1.25 h)	87.2° 17:40	10.97	98%	73.4°
2032-11-16 Tue	61	—	unknown	18:40–21:00 (good, 2.33 h)	87.2° 17:35	11.0	100%	81.5°
2032-11-17 Wed	73	—	unknown	18:40–21:55 (good, 3.25 h)	87.2° 17:30	11.03	99%	89.7°
2032-11-18 Thu	84	—	unknown	18:35–22:55 (good, 4.33 h)	87.2° 17:30	11.06	97%	97.8°
2032-11-19 Fri	100	—	unknown	18:35–23:20 (good, 4.75 h)	87.2° 17:25	11.08	92%	105.4°
2032-11-20 Sat	100	—	unknown	18:35–23:25 (good, 4.83 h)	87.2° 17:20	11.11	85%	112.2°
2032-11-21 Sun	100	—	unknown	18:35–23:25 (good, 4.83 h)	87.2° 17:15	11.13	78%	118.0°
2032-11-22 Mon	100	—	unknown	18:35–23:25 (good, 4.83 h)	87.2° 17:10	11.16	69%	122.4°
2032-11-23 Tue	100	—	unknown	18:35–23:25 (good, 4.83 h)	87.2° 17:10	11.18	60%	125.4°
2032-11-24 Wed	100	—	unknown	18:35–23:25 (good, 4.83 h)	87.2° 17:05	11.2	50%	126.6°
2032-11-25 Thu	100	—	unknown	18:35–23:20 (good, 4.75 h)	87.2° 17:00	11.22	41%	126.0°
2032-11-26 Fri	100	—	unknown	18:35–23:15 (good, 4.67 h)	87.2° 16:55	11.25	32%	123.7°
2032-11-27 Sat	100	—	unknown	18:35–23:15 (good, 4.67 h)	87.2° 16:55	11.27	23%	119.8°
2032-11-28 Sun	100	—	unknown	18:35–23:10 (good, 4.58 h)	87.2° 16:50	11.29	16%	114.6°
2032-11-29 Mon	100	—	unknown	18:35–23:05 (good, 4.5 h)	87.2° 16:45	11.3	9%	108.4°
2032-11-30 Tue	100	—	unknown	18:35–23:00 (good, 4.42 h)	87.2° 16:40	11.32	4%	101.3°
2032-12-01 Wed	100	—	unknown	18:35–22:55 (good, 4.33 h)	87.2° 16:35	11.34	1%	93.7°
2032-12-02 Thu	100	—	unknown	18:35–22:55 (good, 4.33 h)	87.2° 16:35	11.36	0%	85.7°
2032-12-03 Fri	100	—	unknown	18:35–22:50 (good, 4.25 h)	87.2° 16:30	11.37	2%	77.8°
2032-12-04 Sat	100	—	unknown	18:35–22:45 (good, 4.17 h)	87.2° 16:25	11.39	5%	70.3°
2032-12-05 Sun	97	—	unknown	18:35–22:40 (good, 4.08 h)	87.2° 16:20	11.4	11%	63.5°
2032-12-06 Mon	92	—	unknown	18:35–22:35 (good, 4.0 h)	87.2° 16:15	11.41	20%	58.1°
2032-12-07 Tue	82	—	unknown	18:35–22:35 (good, 4.0 h)	87.2° 16:15	11.43	29%	54.6°

Download: CSV · JSON

💡 API

curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2032-11-08&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.