ISO week 04 2025

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

Week begins: Monday, January 20, 2025

Notation:

Calendar

Date	Zodiac day	Events
Mon, Jan 20, 2025	2	Cursa (β Eri) — V 3 — Tropical Winter
Tue, Jan 21, 2025	3	🌗 Last Quarter — 20:30:47 UTC Rigel (β Ori) — V 0 — Tropical Winter C73, NGC 1851, globular cluster in Columba — V 7.3 — Southern Winter
Wed, Jan 22, 2025	4	Capella (α Aur) — V 0 — Northern Winter C31, IC 405, Flaming Star Nebula, bright nebula in Auriga — V 6.0 — Northern Winter
Thu, Jan 23, 2025	5
Fri, Jan 24, 2025	6	Nihal (β Lep) — V 3 — Tropical Winter Elnath (β Tau) — V 2 — Northern Winter Bellatrix (γ Ori) — V 2 — Tropical Winter Mensa center — Constellation — V 5.2 — Antarctic Winter M79, globular cluster in Lepus — V 7.7 — Southern Winter
Sat, Jan 25, 2025	7	Mintaka (δ Ori) — V 2 — Tropical Winter M38, open cluster in Auriga — V 7.4 — Northern Winter NGC 1931, emission/reflection nebula in Auriga — V 14 — Finest NGC — Northern Winter
Sun, Jan 26, 2025	8	β Dor — V 4 — Southern Winter Arneb (α Lep) — V 3 — Tropical Winter Alnilam (ε Ori) — V 2 — Tropical Winter Lepus center — Constellation — V 3.6 — Tropical Winter Orion center — Constellation — V 3.7 — Tropical Winter Pictor center — Constellation — V 3.9 — Southern Winter Orion's Belt center — Asterism — V 1.7 — Tropical Winter Orion's Sword center — Asterism — V 2.8 — Tropical Winter M1, Crab Nebula, supernova remnant in Taurus — V 8.4 — Tropical Winter M36, open cluster in Auriga — V 6.3 — Northern Winter M42, Orion Nebula, emission nebula in Orion — V 4.0 — Tropical Winter M43, DeMairan's Nebula, diffuse nebula in Orion — V 9.0 — Tropical Winter NGC 1973, with NGC 1975 & 1977, emission/reflection nebula in Orion — V 7 — Finest NGC — Tropical Winter

Weekly Solar-System Ephemeris

Snapshot: January 20, 2025 · 00:00 UTC

Notation:

Naked Eye

☉︎ Sun	☽︎ Moon	☿︎ Mercury	♀︎ Venus	♂︎ Mars	♃︎ Jupiter	♄︎ Saturn
♒︎ 0°10′ β −0°00′	♎︎ 10°09′ β −0°59′	♑︎ 17°10′ β −1°12′	♓︎ 16°59′ β +0°21′	♋︎ 24°40′ β +4°19′	♊︎ 11°41′ β −0°32′	♓︎ 16°11′ β −1°56′
Observing
☉		☉

Extended targets:

⚳︎ Ceres	♅︎ Uranus	♆︎ Neptune	♇︎ Pluto
♒︎ 16°18′ β −7°05′	♉︎ 23°19′ β −0°15′	♓︎ 27°39′ β −1°16′	♒︎ 1°40′ β −3°18′
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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