ISO week 22 2025

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

Week begins: Monday, May 26, 2025

Notation:

Calendar

Date	Zodiac day	Events
Mon, May 26, 2025	7	β Com — V 4 — Northern Spring — in the Milky Way M53, globular cluster in Coma Berenices — V 7.6 — Tropical Spring C29, NGC 5005, spiral galaxy in Canes Venatici — V 9.8 — Finest NGC — Northern Spring NGC 5033, galaxy in Canes Venatici — V 10.7 — Finest NGC — Northern Spring
Tue, May 27, 2025	8	🌑 New Moon — 03:02:21 UTC Virgo center — Constellation — V 3.8 — Tropical Spring M63, Sunflower Galaxy, spiral galaxy in Canes Venatici — V 8.6 — Northern Spring
Wed, May 28, 2025	9
Thu, May 29, 2025	10	Spica (α Vir) — V 1 — Tropical Spring Mizar (ζ UMa) — V 2 — Northern Spring C77, NGC 5128, Centaurus A, peculiar galaxy in Centaurus — V 7.0 — Southern Spring
Fri, May 30, 2025	11	C80, NGC 5139, Omega Centauri, globular cluster in Centaurus — V 3.6 — Southern Spring
Sat, May 31, 2025	12	M51, Whirlpool Galaxy, spiral galaxy in Canes Venatici — V 8.4 — Northern Spring
Sun, Jun 1, 2025	13	M83, Southern Pinwheel, spiral galaxy in Hydra — V 7.6 — Southern Spring C45, NGC 5248, spiral galaxy in Boötes — V 10.2 — Tropical Spring

Weekly Solar-System Ephemeris

Snapshot: May 26, 2025 · 00:00 UTC

Notation:

Naked Eye

☉︎ Sun	☽︎ Moon	☿︎ Mercury	♀︎ Venus	♂︎ Mars	♃︎ Jupiter	♄︎ Saturn
♊︎ 5°01′ β +0°00′	♉︎ 19°03′ β +4°06′	♉︎ 29°55′ β −0°09′	♈︎ 19°18′ β −1°47′	♌︎ 17°54′ β +1°33′	♊︎ 26°40′ β −0°11′	♈︎ 0°04′ β −2°05′
Observing
☉	☉	☉

Extended targets:

⚳︎ Ceres	♅︎ Uranus	♆︎ Neptune	♇︎ Pluto
♈︎ 2°53′ β −9°29′	♉︎ 27°46′ β −0°13′	♈︎ 1°45′ β −1°18′	♒︎ 3°43′ β −3°37′
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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