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: 04-05 (100), 04-06 (100), 04-07 (100), 04-08 (100), 04-09 (100) — by astronomy; check the weather when the night is within four days.

2032-03-25astronomy score per night — click a bar for that night2032-04-23

night of	astronomy	weather	overall	best window	highest	dark h	Moon	Moon sep.
2032-03-25 Thu	69	—	unknown	01:15–04:40 (good, 3.42 h)	87.1° 06:40	8.43	99%	103.5°
2032-03-26 Fri	63	—	unknown	01:30–04:40 (good, 3.17 h)	87.1° 06:40	8.38	100%	97.1°
2032-03-27 Sat	57	—	unknown	01:55–05:40 (good, 2.75 h)	87.1° 07:35	8.32	99%	90.3°
2032-03-28 Sun	52	—	unknown	03:15–05:35 (good, 2.33 h)	87.1° 07:30	8.27	96%	83.4°
2032-03-29 Mon	50	—	unknown	03:20–05:35 (good, 2.25 h)	87.1° 07:25	8.22	92%	76.7°
2032-03-30 Tue	50	—	unknown	03:05–05:30 (good, 2.42 h)	87.1° 07:25	8.16	85%	70.3°
2032-03-31 Wed	53	—	unknown	02:00–05:30 (good, 3.5 h)	87.1° 07:20	8.11	76%	64.7°
2032-04-01 Thu	61	—	unknown	01:45–05:30 (good, 3.75 h)	87.1° 07:15	8.05	66%	60.4°
2032-04-02 Fri	77	—	unknown	01:15–05:25 (good, 4.17 h)	87.1° 07:10	8.0	56%	57.6°
2032-04-03 Sat	90	—	unknown	01:15–05:25 (good, 4.17 h)	87.1° 07:05	7.94	44%	56.9°
2032-04-04 Sun	96	—	unknown	01:10–05:25 (good, 4.25 h)	87.1° 07:05	7.89	33%	58.5°
2032-04-05 Mon	100	—	unknown	01:05–05:20 (good, 4.25 h)	87.1° 07:00	7.83	23%	62.2°
2032-04-06 Tue	100	—	unknown	01:00–05:20 (good, 4.33 h)	87.1° 06:55	7.77	14%	67.7°
2032-04-07 Wed	100	—	unknown	00:55–05:15 (good, 4.33 h)	87.1° 06:50	7.72	6%	74.4°
2032-04-08 Thu	100	—	unknown	00:55–05:15 (good, 4.33 h)	87.1° 06:45	7.66	2%	81.9°
2032-04-09 Fri	100	—	unknown	00:50–05:15 (good, 4.42 h)	87.1° 06:45	7.61	0%	89.7°
2032-04-10 Sat	100	—	unknown	00:45–05:10 (good, 4.42 h)	87.1° 06:40	7.55	1%	97.4°
2032-04-11 Sun	100	—	unknown	00:40–05:10 (good, 4.5 h)	87.1° 06:35	7.49	4%	104.6°
2032-04-12 Mon	100	—	unknown	00:35–05:05 (good, 4.5 h)	87.1° 06:30	7.43	10%	110.9°
2032-04-13 Tue	100	—	unknown	00:35–05:05 (good, 4.5 h)	87.1° 06:30	7.38	16%	116.2°
2032-04-14 Wed	100	—	unknown	00:30–05:05 (good, 4.58 h)	87.1° 06:25	7.32	25%	120.1°
2032-04-15 Thu	100	—	unknown	00:30–05:00 (good, 4.5 h)	87.1° 06:20	7.26	34%	122.4°
2032-04-16 Fri	100	—	unknown	00:25–05:00 (good, 4.58 h)	87.1° 06:15	7.2	43%	123.1°
2032-04-17 Sat	100	—	unknown	00:25–04:55 (good, 4.5 h)	87.1° 06:10	7.15	53%	122.2°
2032-04-18 Sun	100	—	unknown	00:20–04:55 (good, 4.58 h)	87.1° 06:10	7.09	62%	119.8°
2032-04-19 Mon	100	—	unknown	00:20–04:55 (good, 4.58 h)	87.1° 06:05	7.03	71%	116.0°
2032-04-20 Tue	100	—	unknown	00:20–04:50 (good, 4.5 h)	87.1° 06:00	6.97	79%	111.2°
2032-04-21 Wed	100	—	unknown	00:25–04:50 (good, 4.42 h)	87.1° 05:55	6.91	86%	105.6°
2032-04-22 Thu	85	—	unknown	00:25–04:45 (good, 4.33 h)	87.1° 05:50	6.86	92%	99.3°
2032-04-23 Fri	77	—	unknown	00:55–04:45 (good, 3.83 h)	87.1° 05:50	6.8	97%	92.6°

Download: CSV · JSON

💡 API

curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2032-03-25&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.