ISO week 19 2025
This week is currently in preparation and will be published as part of the Star Almanack.
Week begins: Monday, May 5, 2025
Notation:
Calendar
| Date | Zodiac day | Events |
|---|---|---|
| Mon, May 5, 2025 | ♉ 17 |  η-Aquariids peak · radiant in Aquarius · expected ZHR ≈ 50 · Moon 62% illuminated: substantial moonlight interference · Use a dark site, allow 20–30 minutes for dark adaptation, and observe with the unaided eye. Put the Moon behind a building, tree, or other obstruction and watch the darkest open sky.Beltane · Spring–Summer midpoint — 05:57:11 UTC Denebola (β Leo) —  V 2 — Tropical SpringZavijava (β Vir) —  V 4 — Tropical Spring |
| Tue, May 6, 2025 | ♉ 18 | β Hya — V 4 — Southern SpringPhecda (γ UMa) — V 2 — Northern SpringNGC 3941, galaxy in Ursa Major —  V 11.3 — Finest NGC — Northern Spring |
| Wed, May 7, 2025 | ♉ 19 | M109, barred spiral galaxy in Ursa Major — V 9.8 — Northern Spring |
| Thu, May 8, 2025 | ♉ 20 | C60, NGC 4038, Antennae Galaxies, spiral galaxy in Corvus — V 11.3 — Finest NGC — Tropical SpringC61, NGC 4039, Antennae Galaxies, spiral galaxy in Corvus — V 13.0 — Tropical SpringNGC 4026, galaxy in Ursa Major — V 11.7 — Finest NGC — Northern Spring |
| Fri, May 9, 2025 | ♉ 21 | NGC 4088, galaxy in Ursa Major — V 11.3 — Finest NGC — Northern Spring |
| Sat, May 10, 2025 | ♉ 22 | Alchiba (α Crv) — V 4 — Southern SpringNGC 4111, galaxy in Canes Venatici — V 11.7 — Finest NGC — Northern Spring |
| Sun, May 11, 2025 | ♉ 23 | M98, spiral galaxy in Coma Berenices — V 10.1 — Tropical SpringNGC 4157, galaxy in Ursa Major — V 12.1 — Finest NGC — Northern Spring |
Weekly Solar-System Ephemeris
Snapshot: May 5, 2025 · 00:00 UTC
Notation:
Naked Eye
| ☉︎ Sun | ☽︎ Moon | ☿︎ Mercury | ♀︎ Venus | ♂︎ Mars | ♃︎ Jupiter | ♄︎ Saturn |
|---|---|---|---|---|---|---|
| ♉︎ 14°46′ β +0°00′ | ♌︎ 19°44′ β +3°05′ | ♈︎ 21°14′ β −2°47′ | ♈︎ 2°34′ β +0°28′ | ♌︎ 7°27′ β +1°55′ | ♊︎ 22°11′ β −0°14′ | ♓︎ 28°15′ β −2°01′ |
| Observing | ||||||
| ☉ | | | | | | |
Extended targets:
| ⚳︎ Ceres | ♅︎ Uranus | ♆︎ Neptune | ♇︎ Pluto |
|---|---|---|---|
| ♓︎ 26°07′ β −8°47′ | ♉︎ 26°33′ β −0°13′ | ♈︎ 1°13′ β −1°17′ | ♒︎ 3°49′ β −3°33′ |
| 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
Sky Notes
Naked eye
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Binoculars
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Telescope
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