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 Vega: 06-07 (100), 06-08 (100), 06-09 (100), 06-10 (100), 06-11 (100) — by astronomy; check the weather when the night is within four days.

2032-06-07astronomy score per night — click a bar for that night2032-07-06

night of	astronomy	weather	overall	best window	highest	dark h	Moon	Moon sep.
2032-06-07 Mon	100	—	unknown	23:05–03:40 (good, 4.58 h)	87.1° 02:50	4.59	0%	117.4°
2032-06-08 Tue	100	—	unknown	23:05–03:40 (good, 4.58 h)	87.1° 02:45	4.57	1%	120.9°
2032-06-09 Wed	100	—	unknown	23:05–03:40 (good, 4.58 h)	87.1° 02:45	4.54	4%	122.8°
2032-06-10 Thu	100	—	unknown	23:05–03:40 (good, 4.58 h)	87.1° 02:40	4.52	8%	122.9°
2032-06-11 Fri	100	—	unknown	23:10–03:40 (good, 4.5 h)	87.1° 02:35	4.5	14%	121.4°
2032-06-12 Sat	100	—	unknown	23:10–03:40 (good, 4.5 h)	87.1° 02:30	4.49	22%	118.5°
2032-06-13 Sun	100	—	unknown	23:10–03:40 (good, 4.5 h)	87.1° 02:30	4.47	30%	114.4°
2032-06-14 Mon	100	—	unknown	23:10–03:40 (good, 4.5 h)	87.1° 02:25	4.46	39%	109.3°
2032-06-15 Tue	100	—	unknown	23:10–03:40 (good, 4.5 h)	87.1° 02:20	4.45	48%	103.5°
2032-06-16 Wed	100	—	unknown	23:10–03:40 (good, 4.5 h)	87.1° 02:15	4.44	58%	97.2°
2032-06-17 Thu	100	—	unknown	23:10–03:40 (good, 4.5 h)	87.1° 02:10	4.43	67%	90.6°
2032-06-18 Fri	100	—	unknown	23:10–03:40 (good, 4.5 h)	87.1° 02:10	4.43	76%	83.7°
2032-06-19 Sat	100	—	unknown	23:10–03:40 (good, 4.5 h)	87.1° 02:05	4.42	85%	76.8°
2032-06-20 Sun	73	—	unknown	23:15–03:40 (good, 4.42 h)	87.1° 02:00	4.42	92%	70.3°
2032-06-21 Mon	60	—	unknown	23:15–03:40 (good, 4.42 h)	87.1° 01:55	4.42	97%	64.6°
2032-06-22 Tue	50	—	unknown	02:55–03:40 (good, 0.75 h)	87.1° 01:50	4.43	100%	60.1°
2032-06-23 Wed	47	—	unknown	23:10–03:40 (marginal, 4.5 h)	87.1° 01:50	4.43	100%	57.5°
2032-06-24 Thu	51	—	unknown	23:15–00:15 (good, 1.0 h)	87.1° 01:45	4.44	97%	57.2°
2032-06-25 Fri	61	—	unknown	23:15–01:55 (good, 2.67 h)	87.1° 01:40	4.45	91%	59.3°
2032-06-26 Sat	74	—	unknown	23:15–03:40 (good, 4.42 h)	87.1° 01:35	4.46	84%	63.5°
2032-06-27 Sun	100	—	unknown	23:15–03:40 (good, 4.42 h)	87.1° 01:35	4.48	74%	69.4°
2032-06-28 Mon	100	—	unknown	23:10–03:40 (good, 4.5 h)	87.1° 01:30	4.49	63%	76.2°
2032-06-29 Tue	100	—	unknown	23:10–03:45 (good, 4.58 h)	87.1° 01:25	4.51	52%	83.6°
2032-06-30 Wed	100	—	unknown	23:10–03:45 (good, 4.58 h)	87.1° 01:20	4.53	41%	91.1°
2032-07-01 Thu	100	—	unknown	23:10–03:45 (good, 4.58 h)	87.1° 01:15	4.55	30%	98.3°
2032-07-02 Fri	100	—	unknown	23:10–03:45 (good, 4.58 h)	87.1° 01:15	4.57	21%	105.2°
2032-07-03 Sat	100	—	unknown	23:10–03:45 (good, 4.58 h)	87.1° 01:10	4.6	13%	111.2°
2032-07-04 Sun	100	—	unknown	23:10–03:45 (good, 4.58 h)	87.1° 01:05	4.63	7%	116.3°
2032-07-05 Mon	100	—	unknown	23:10–03:50 (good, 4.67 h)	87.1° 01:00	4.65	3%	120.1°
2032-07-06 Tue	100	—	unknown	23:10–03:50 (good, 4.67 h)	87.1° 00:55	4.68	1%	122.4°

Download: CSV · JSON

💡 API

curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2032-06-07&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.