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: 10-04 (100), 10-05 (100), 10-06 (100), 10-07 (100), 10-08 (100) — by astronomy; check the weather when the night is within four days.

2032-10-04astronomy score per night — click a bar for that night2032-11-02

night of	astronomy	weather	overall	best window	highest	dark h	Moon	Moon sep.
2032-10-04 Mon	100	—	unknown	20:35–05:55 (good, 9.33 h)	79.1° 02:00	9.35	0%	155.4°
2032-10-05 Tue	100	—	unknown	20:30–05:55 (good, 9.42 h)	79.1° 01:55	9.39	2%	160.3°
2032-10-06 Wed	100	—	unknown	20:30–05:55 (good, 9.42 h)	79.1° 01:50	9.44	5%	158.4°
2032-10-07 Thu	100	—	unknown	20:25–05:55 (good, 9.5 h)	79.1° 01:50	9.49	11%	150.8°
2032-10-08 Fri	100	—	unknown	20:25–05:55 (good, 9.5 h)	79.1° 01:45	9.53	18%	140.6°
2032-10-09 Sat	100	—	unknown	20:25–06:00 (good, 9.58 h)	79.1° 01:40	9.58	27%	129.1°
2032-10-10 Sun	100	—	unknown	20:20–06:00 (good, 9.67 h)	79.1° 01:35	9.62	37%	117.0°
2032-10-11 Mon	100	—	unknown	20:20–06:00 (good, 9.67 h)	79.1° 01:30	9.67	47%	104.3°
2032-10-12 Tue	100	—	unknown	20:20–06:00 (good, 9.67 h)	79.1° 01:30	9.71	59%	91.2°
2032-10-13 Wed	100	—	unknown	20:25–06:05 (good, 9.67 h)	79.1° 01:25	9.76	70%	77.9°
2032-10-14 Thu	100	—	unknown	22:15–06:05 (good, 7.83 h)	79.1° 01:20	9.8	80%	64.4°
2032-10-15 Fri	93	—	unknown	02:15–06:05 (good, 3.83 h)	79.1° 01:15	9.84	88%	50.9°
2032-10-16 Sat	84	—	unknown	05:45–06:05 (good, 0.33 h)	79.1° 01:15	9.89	95%	37.9°
2032-10-17 Sun	39	—	unknown	01:40–06:05 (marginal, 4.42 h)	79.1° 01:10	9.93	99%	26.5°
2032-10-18 Mon	32	—	unknown	20:10–23:10 (marginal, 3.0 h)	79.1° 01:05	9.97	100%	19.8°
2032-10-19 Tue	36	—	unknown	20:10–00:05 (marginal, 3.92 h)	79.1° 01:00	10.01	98%	22.3°
2032-10-20 Wed	49	—	unknown	20:05–02:10 (marginal, 6.08 h)	79.1° 00:55	10.06	94%	31.4°
2032-10-21 Thu	85	—	unknown	20:05–20:40 (good, 0.58 h)	79.1° 00:55	10.1	88%	42.7°
2032-10-22 Fri	93	—	unknown	20:05–01:05 (good, 5.0 h)	79.1° 00:50	10.14	80%	54.6°
2032-10-23 Sat	100	—	unknown	20:05–04:05 (good, 8.0 h)	79.1° 00:45	10.18	71%	66.5°
2032-10-24 Sun	100	—	unknown	20:00–05:35 (good, 9.58 h)	79.1° 00:40	10.22	62%	78.2°
2032-10-25 Mon	100	—	unknown	20:00–05:50 (good, 9.83 h)	79.1° 00:35	10.26	52%	89.6°
2032-10-26 Tue	100	—	unknown	20:00–05:55 (good, 9.92 h)	79.1° 00:35	10.3	42%	100.9°
2032-10-27 Wed	100	—	unknown	20:00–05:55 (good, 9.92 h)	79.1° 00:30	10.34	33%	112.0°
2032-10-28 Thu	100	—	unknown	19:55–05:55 (good, 10.0 h)	79.1° 00:25	10.37	24%	123.0°
2032-10-29 Fri	100	—	unknown	19:55–05:50 (good, 9.92 h)	79.1° 00:20	10.41	17%	133.7°
2032-10-30 Sat	100	—	unknown	19:55–04:50 (good, 9.92 h)	79.1° 00:20	10.45	10%	144.0°
2032-10-31 Sun	100	—	unknown	18:55–04:45 (good, 9.83 h)	79.1° 23:15	10.49	5%	153.2°
2032-11-01 Mon	100	—	unknown	18:50–04:40 (good, 9.83 h)	79.1° 23:10	10.52	2%	159.5°
2032-11-02 Tue	100	—	unknown	18:50–04:40 (good, 9.83 h)	79.1° 23:05	10.56	0%	159.6°

Download: CSV · JSON

💡 API

curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2032-10-04&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.