ISO week 30 2027

This week is currently in preparation and will be published as part of the Star Almanack.

Week begins: Monday, July 26, 2027

Notation:

Calendar

Date	Zodiac day	Events
Mon, Jul 26, 2027	4	🌗 Last Quarter — 16:54:55 UTC Ara center — Constellation — V 3.5 — Southern Summer M9, globular cluster in Ophiuchus — V 7.7 — Tropical Summer
Tue, Jul 27, 2027	5	β Ara — V 3 — Southern Summer C81, NGC 6352, globular cluster in Ara — V 8.1 — Southern Summer
Wed, Jul 28, 2027	6	NGC 6369, Little Ghost Nebula, planetary nebula in Oph — V 11 — Finest NGC — Southern Summer
Thu, Jul 29, 2027	7	α Ara — V 3 — Southern Summer Rastaban (β Dra) — V 3 — Northern Summer Shaula (λ Sco) — V 2 — Southern Summer
Fri, Jul 30, 2027	8	Rasalhague (α Oph) — V 2 — Tropical Summer Sargas (θ Sco) — V 2 — Southern Summer M14, globular cluster in Ophiuchus — V 7.6 — Tropical Summer
Sat, Jul 31, 2027	9	Southern δ-Aquariids peak · radiant in Aquarius · expected ZHR ≈ 25 · Moon 6% illuminated: little moonlight interference · Use a dark site, allow 20–30 minutes for dark adaptation, and observe with the unaided eye. Watch a broad area of sky rather than staring directly at the radiant. α-Capricornids peak · radiant in Capricornus · expected ZHR ≈ 5 · Moon 6% illuminated: little moonlight interference · Use a dark site, allow 20–30 minutes for dark adaptation, and observe with the unaided eye. Watch a broad area of sky rather than staring directly at the radiant. M6, Butterfly Cluster, open cluster in Scorpius — V 4.2 — Southern Summer C86, NGC 6397, globular cluster in Ara — V 5.6 — Southern Summer
Sun, Aug 1, 2027	10	Cebalrai (β Oph) — V 3 — Tropical Summer κ Sco — V 2 — Southern Summer

Weekly Solar-System Ephemeris

Snapshot: July 26, 2027 · 00:00 UTC

Notation:

Naked Eye

☉︎ Sun	☽︎ Moon	☿︎ Mercury	♀︎ Venus	♂︎ Mars	♃︎ Jupiter	♄︎ Saturn
♌︎ 2°49′ β +0°00′	♈︎ 24°23′ β +5°04′	♋︎ 16°01′ β −0°20′	♋︎ 28°08′ β +0°48′	♎︎ 6°15′ β +0°14′	♌︎ 29°58′ β +0°54′	♈︎ 27°41′ β −2°31′
Observing
☉		☉	☉

Extended targets:

⚳︎ Ceres	♅︎ Uranus	♆︎ Neptune	♇︎ Pluto
♌︎ 27°15′ β +7°38′	♊︎ 8°53′ β −0°06′	♈︎ 6°35′ β −1°26′	♒︎ 6°02′ β −4°46′
Observing

β = ecliptic latitude (+ north, − south). Observing combines visual magnitude with solar elongation. Two telescope glyphs = substantial telescope. ☉ = Near Sun — not currently observable.

Notation:

Planet Finder

Planet Finder — Mixed Learner — Mixed Learner

Sky Notes

Naked eye

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Binoculars

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Telescope

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