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

2032-10-06astronomy score per night — click a bar for that night2032-11-04

night of	astronomy	weather	overall	best window	highest	dark h	Moon	Moon sep.
2032-10-06 Wed	100	—	unknown	23:00–05:55 (good, 6.92 h)	72.6° 04:05	9.44	5%	160.4°
2032-10-07 Thu	100	—	unknown	22:55–05:55 (good, 7.0 h)	72.6° 04:00	9.49	11%	171.1°
2032-10-08 Fri	100	—	unknown	22:50–05:55 (good, 7.08 h)	72.6° 03:55	9.53	18%	170.4°
2032-10-09 Sat	100	—	unknown	22:45–06:00 (good, 7.25 h)	72.6° 03:55	9.58	27%	159.0°
2032-10-10 Sun	100	—	unknown	22:45–06:00 (good, 7.25 h)	72.6° 03:50	9.62	37%	146.2°
2032-10-11 Mon	100	—	unknown	22:45–06:00 (good, 7.25 h)	72.6° 03:45	9.67	47%	132.8°
2032-10-12 Tue	100	—	unknown	22:40–06:00 (good, 7.33 h)	72.6° 03:40	9.71	59%	119.1°
2032-10-13 Wed	100	—	unknown	22:45–06:05 (good, 7.33 h)	72.6° 03:35	9.76	70%	105.0°
2032-10-14 Thu	100	—	unknown	22:50–06:05 (good, 7.25 h)	72.6° 03:35	9.8	80%	90.7°
2032-10-15 Fri	100	—	unknown	00:15–06:05 (good, 5.83 h)	72.6° 03:30	9.84	88%	76.1°
2032-10-16 Sat	97	—	unknown	03:05–06:05 (good, 3.0 h)	72.6° 03:25	9.89	95%	61.4°
2032-10-17 Sun	53	—	unknown	22:30–06:05 (marginal, 7.58 h)	72.6° 03:20	9.93	99%	46.7°
2032-10-18 Mon	29	—	unknown	03:00–06:10 (marginal, 3.17 h)	72.6° 03:15	9.97	100%	32.2°
2032-10-19 Tue	23	—	unknown	04:20–06:10 (marginal, 1.83 h)	72.6° 03:15	10.01	98%	18.3°
2032-10-20 Wed	25	—	unknown	22:10–01:45 (marginal, 3.58 h)	72.6° 03:10	10.06	94%	7.3°
2032-10-21 Thu	35	—	unknown	21:50–06:10 (marginal, 8.33 h)	72.6° 03:05	10.1	88%	12.7°
2032-10-22 Fri	50	—	unknown	21:30–06:10 (marginal, 8.67 h)	72.6° 03:00	10.14	80%	24.9°
2032-10-23 Sat	81	—	unknown	22:40–01:25 (good, 2.75 h)	72.6° 03:00	10.18	71%	37.5°
2032-10-24 Sun	88	—	unknown	21:50–05:25 (good, 7.58 h)	72.6° 02:55	10.22	62%	49.8°
2032-10-25 Mon	96	—	unknown	21:45–06:15 (good, 8.5 h)	72.6° 02:50	10.26	52%	61.8°
2032-10-26 Tue	100	—	unknown	21:40–06:15 (good, 8.58 h)	72.6° 02:45	10.3	42%	73.7°
2032-10-27 Wed	100	—	unknown	21:35–06:20 (good, 8.75 h)	72.6° 02:40	10.34	33%	85.5°
2032-10-28 Thu	100	—	unknown	21:30–06:20 (good, 8.83 h)	72.6° 02:40	10.37	24%	97.2°
2032-10-29 Fri	100	—	unknown	21:30–06:20 (good, 8.83 h)	72.6° 02:35	10.41	17%	109.0°
2032-10-30 Sat	100	—	unknown	21:25–05:20 (good, 8.92 h)	72.6° 02:30	10.45	10%	120.8°
2032-10-31 Sun	100	—	unknown	20:20–05:20 (good, 9.0 h)	72.6° 01:25	10.49	5%	132.8°
2032-11-01 Mon	100	—	unknown	20:15–05:25 (good, 9.17 h)	72.6° 01:20	10.52	2%	144.9°
2032-11-02 Tue	100	—	unknown	20:10–05:25 (good, 9.25 h)	72.6° 01:20	10.56	0%	157.0°
2032-11-03 Wed	100	—	unknown	20:10–05:25 (good, 9.25 h)	72.6° 01:15	10.59	0%	168.5°
2032-11-04 Thu	100	—	unknown	20:05–05:25 (good, 9.33 h)	72.6° 01:10	10.63	3%	172.4°

Download: CSV · JSON

💡 API

curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2032-10-06&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.