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: 07-30 (66), 07-19 (64), 07-18 (63), 07-17 (62), 07-16 (59) — by astronomy; check the weather when the night is within four days.

2032-07-01astronomy score per night — click a bar for that night2032-07-30

night of	astronomy	weather	overall	best window	highest	dark h	Moon	Moon sep.
2032-07-01 Thu	22	—	unknown	03:00–03:45 (good, 0.75 h)	79.1° 08:15	4.55	30%	19.0°
2032-07-02 Fri	26	—	unknown	02:50–03:45 (good, 0.92 h)	79.1° 08:10	4.57	21%	24.3°
2032-07-03 Sat	32	—	unknown	02:40–03:45 (good, 1.08 h)	79.1° 08:05	4.6	13%	33.8°
2032-07-04 Sun	35	—	unknown	02:35–03:45 (good, 1.17 h)	79.1° 08:00	4.63	7%	44.8°
2032-07-05 Mon	38	—	unknown	02:30–03:50 (good, 1.33 h)	79.1° 08:00	4.65	3%	56.2°
2032-07-06 Tue	39	—	unknown	02:25–03:50 (good, 1.42 h)	79.1° 07:55	4.68	1%	67.7°
2032-07-07 Wed	41	—	unknown	02:25–03:50 (good, 1.42 h)	79.1° 07:50	4.72	0%	79.2°
2032-07-08 Thu	42	—	unknown	02:20–03:50 (good, 1.5 h)	79.1° 07:45	4.75	2%	90.6°
2032-07-09 Fri	46	—	unknown	02:15–03:55 (good, 1.67 h)	79.1° 07:40	4.78	5%	101.9°
2032-07-10 Sat	48	—	unknown	02:10–03:55 (good, 1.75 h)	79.1° 07:40	4.82	10%	113.0°
2032-07-11 Sun	49	—	unknown	02:05–03:55 (good, 1.83 h)	79.1° 07:35	4.86	16%	124.0°
2032-07-12 Mon	51	—	unknown	02:05–03:55 (good, 1.83 h)	79.1° 07:30	4.9	24%	134.7°
2032-07-13 Tue	54	—	unknown	02:00–04:00 (good, 2.0 h)	79.1° 07:25	4.94	32%	144.9°
2032-07-14 Wed	56	—	unknown	01:55–04:00 (good, 2.08 h)	79.1° 07:20	4.98	42%	154.1°
2032-07-15 Thu	58	—	unknown	01:50–04:00 (good, 2.17 h)	79.1° 07:20	5.02	52%	160.2°
2032-07-16 Fri	59	—	unknown	01:45–04:00 (good, 2.25 h)	79.1° 07:15	5.07	62%	159.8°
2032-07-17 Sat	62	—	unknown	01:50–04:05 (good, 2.25 h)	79.1° 07:10	5.11	72%	152.7°
2032-07-18 Sun	63	—	unknown	01:45–04:05 (good, 2.33 h)	79.1° 07:05	5.16	81%	142.2°
2032-07-19 Mon	64	—	unknown	01:45–04:05 (good, 2.33 h)	79.1° 07:05	5.2	89%	129.9°
2032-07-20 Tue	58	—	unknown	01:45–04:10 (good, 2.42 h)	79.1° 07:00	5.25	95%	116.8°
2032-07-21 Wed	49	—	unknown	01:50–04:10 (good, 2.33 h)	79.1° 06:55	5.3	99%	103.0°
2032-07-22 Thu	39	—	unknown	02:30–04:10 (good, 1.67 h)	79.1° 06:50	5.35	100%	88.8°
2032-07-23 Fri	31	—	unknown	03:50–04:10 (good, 0.33 h)	79.1° 06:45	5.4	98%	74.5°
2032-07-24 Sat	25	—	unknown	01:05–04:15 (marginal, 3.17 h)	79.1° 06:45	5.45	93%	60.4°
2032-07-25 Sun	21	—	unknown	01:00–04:15 (marginal, 3.25 h)	79.1° 06:40	5.5	86%	46.8°
2032-07-26 Mon	21	—	unknown	00:55–04:15 (marginal, 3.33 h)	79.1° 06:35	5.55	76%	34.2°
2032-07-27 Tue	28	—	unknown	00:40–04:20 (marginal, 3.67 h)	79.1° 06:30	5.61	66%	24.0°
2032-07-28 Wed	39	—	unknown	02:35–04:20 (good, 1.75 h)	79.1° 06:25	5.66	55%	19.2°
2032-07-29 Thu	51	—	unknown	01:15–04:20 (good, 3.08 h)	79.1° 06:25	5.71	44%	22.8°
2032-07-30 Fri	66	—	unknown	00:50–04:25 (good, 3.58 h)	79.1° 06:20	5.77	34%	31.6°

Download: CSV · JSON

💡 API

curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2032-07-01&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.