ISO week 27 2025

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

Week begins: Monday, June 30, 2025

Notation:

Calendar

Date	Zodiac day	Events
Mon, Jun 30, 2025	10	Little Dipper center — Asterism — V 2.0 — Arctic Summer
Tue, Jul 1, 2025	11	Serpens Caput center — Constellation — V 3.8 — Tropical Summer
Wed, Jul 2, 2025	12	🌓 First Quarter — 19:30:12 UTC Unukalhai (α Ser) — V 3 — Tropical Summer β Ser — V 4 — Tropical Summer
Thu, Jul 3, 2025	13
Fri, Jul 4, 2025	14	β TrA — V 3 — Southern Summer Corona Borealis center — Constellation — V 4.1 — Northern Summer
Sat, Jul 5, 2025	15
Sun, Jul 6, 2025	16	Dschubba (δ Sco) — V 2 — Tropical Summer C95, NGC 6025, open cluster in Triangulum Australe — V 5.1 — Southern Summer

Weekly Solar-System Ephemeris

Snapshot: June 30, 2025 · 00:00 UTC

Notation:

Naked Eye

☉︎ Sun	☽︎ Moon	☿︎ Mercury	♀︎ Venus	♂︎ Mars	♃︎ Jupiter	♄︎ Saturn
♋︎ 8°29′ β −0°00′	♍︎ 6°34′ β +1°16′	♌︎ 3°58′ β +0°44′	♉︎ 24°55′ β −2°38′	♍︎ 7°11′ β +1°02′	♋︎ 4°35′ β −0°08′	♈︎ 1°47′ β −2°14′
Observing
☉					☉

Extended targets:

⚳︎ Ceres	♅︎ Uranus	♆︎ Neptune	♇︎ Pluto
♈︎ 11°58′ β −11°02′	♉︎ 29°40′ β −0°13′	♈︎ 2°10′ β −1°19′	♒︎ 3°10′ β −3°43′
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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