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: 10-23 (100), 10-24 (100), 10-25 (100), 10-26 (100), 10-27 (100) — by astronomy; check the weather when the night is within four days.

2032-10-17astronomy score per night — click a bar for that night2032-11-15

night of	astronomy	weather	overall	best window	highest	dark h	Moon	Moon sep.
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°
2032-11-03 Wed	100	—	unknown	18:50–04:35 (good, 9.75 h)	79.1° 23:00	10.59	0%	153.2°
2032-11-04 Thu	100	—	unknown	18:50–04:30 (good, 9.67 h)	79.1° 23:00	10.63	3%	143.3°
2032-11-05 Fri	100	—	unknown	18:50–04:25 (good, 9.58 h)	79.1° 22:55	10.66	8%	132.0°
2032-11-06 Sat	100	—	unknown	18:45–04:25 (good, 9.67 h)	79.1° 22:50	10.7	14%	119.8°
2032-11-07 Sun	100	—	unknown	18:45–04:20 (good, 9.58 h)	79.1° 22:45	10.73	23%	107.2°
2032-11-08 Mon	100	—	unknown	18:45–04:15 (good, 9.5 h)	79.1° 22:40	10.76	33%	94.3°
2032-11-09 Tue	100	—	unknown	18:45–04:10 (good, 9.42 h)	79.1° 22:40	10.79	44%	81.2°
2032-11-10 Wed	100	—	unknown	18:45–04:05 (good, 9.33 h)	79.1° 22:35	10.83	55%	68.1°
2032-11-11 Thu	97	—	unknown	19:05–04:05 (good, 9.0 h)	79.1° 22:30	10.86	66%	54.9°
2032-11-12 Fri	88	—	unknown	23:45–04:00 (good, 4.25 h)	79.1° 22:25	10.89	77%	42.1°
2032-11-13 Sat	72	—	unknown	03:35–03:55 (good, 0.33 h)	79.1° 22:25	10.92	86%	30.4°
2032-11-14 Sun	38	—	unknown	18:40–04:05 (marginal, 9.42 h)	79.1° 22:20	10.95	93%	21.6°
2032-11-15 Mon	29	—	unknown	18:40–21:05 (marginal, 2.42 h)	79.1° 22:15	10.97	98%	20.1°

Download: CSV · JSON

💡 API

curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2032-10-17&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.