Star Almanack
Alexander Ferrari Miller

ISO 2025-W26

Week begins: Monday, June 23, 2025

Notation:

Calendar

DateZodiac dayEvents
Mon, Jun 23, 2025♋ 3
M102 — Telescope 10 — Northern Summer
Tue, Jun 24, 2025♋ 4
Wed, Jun 25, 2025♋ 5
🌑 New Moon — 10:31:37 UTC
Finest NGC 87 / NGC 5907 · Splinter Galaxy — Telescope 11 — Northern Summer
Zubeneschamali (β Lib) — Naked eye 3 — Tropical Summer
β Cir — Binoculars 4 — Southern Summer
Thu, Jun 26, 2025♋ 6
M5 — Telescope 6 — Tropical Summer
Fri, Jun 27, 2025♋ 7
Sat, Jun 28, 2025♋ 8
Nusakan (β CrB) — Binoculars 4 — Northern Summer — in the Milky Way
Sun, Jun 29, 2025♋ 9
Alphecca (α CrB) — Naked eye 2 — Northern Summer — in the Milky Way

Weekly Solar-System Ephemeris

Snapshot: Week begins June 23, 2025, 00:00 UTC.

(-90° to +90°; defaults +45°, 21:00 LAT)

Notation:
Body☉︎☽︎☿︎♀︎♂︎♃︎♄︎
Ecliptic♋︎ 1°48′
β +0°00′		♉︎ 28°11′
β +4°36′		♋︎ 24°43′
β +1°38′		♉︎ 17°21′
β −2°41′		♍︎ 3°11′
β +1°08′		♋︎ 2°59′
β −0°09′		♈︎ 1°36′
β −2°12′
ObservingNightNaked eye -7.2Naked eye -0.0Naked eye -4.2Naked eye 1.4☉︎Naked eye 1.0
Rise04:1201:4105:5601:5209:2404:1900:05
Set19:4817:2221:2415:5823:0519:5111:59

Extended targets:

Body⚳︎♅︎♆︎♇︎
Ecliptic♈︎ 10°26′
β −10°41′		♉︎ 29°19′
β −0°13′		♈︎ 2°08′
β −1°19′		♒︎ 3°18′
β −3°42′
ObservingTelescope 9.1Binoculars 5.8Telescope 7.8TelescopeTelescope 14.4
Rise01:0802:1300:0121:55
Set12:2717:0812:0406:41

β = ecliptic latitude (+ north, − south).
Rise and set are Local Apparent Time for the selected latitude.
Naked-eye observing uses the Sun’s altitude at the selected Monday observer time: Daylight (Sun ≥ −0.833°), Civil twilight (−0.833° to −6°), Nautical twilight (−6° to −12°), Astronomical twilight (−12° to −18°), and Night (below −18°).
Solar Glare identifies a body too close to the Sun when the sky-state rule does not already supersede its naked-eye classification.
The Sun’s observing status uses this same five-state sky classification.

Notation:

Planet Finder

Planet Finder — Greek / Symbols
Greek / Symbols
Planet Finder — English
English
Planet Finder — Mixed Learner
Mixed Learner

Sky Notes

Kilroy: Sky Notes · generated 2026-10-23 11:28:27 UTC

View:

ISO 2025-W26 runs from June 23 through June 29. Saturn and Neptune are separated by about 0.5° in geocentric ecliptic longitude at the Monday 00:00 UTC snapshot. To find Mars, first identify Leo, trace the Sickle, and locate Regulus in that pattern. Mars lies about 3.4° away in ecliptic longitude at the Monday 00:00 UTC snapshot; use the finder to transfer from Regulus to the planet.

Naked eye: 🌑 New Moon — 10:31:37 UTC. The dark Moon favors faint targets and extended star fields. Use Zubeneschamali, Alphecca as the week’s fixed-sky framework.

Zubeneschamali: The Brightest Star in Libra — An illuminating guide to the constellation's prominent star, its significance and qualities.

Alphecca: The Bright Star of Corona Borealis — An enduring beacon in the constellation of Corona Borealis, Alphecca's brilliance has inspired stargazers for centuries.

Planets: Moon: Naked eye; magnitude -7.2; direct motion; 8.5% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Solar conjunction in ecliptic longitude Jun 25 10:31 UTC. Conjunction with Mercury in ecliptic longitude Jun 27 07:12 UTC. Conjunction with Jupiter in ecliptic longitude Jun 25 09:33 UTC. Conjunction with Uranus in ecliptic longitude Jun 23 01:50 UTC. Mercury: Naked eye; magnitude -0.0; direct motion; 60.5% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Jun 27 07:12 UTC. Venus: Naked eye; magnitude -4.2; direct motion; 60.3% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Mars: Naked eye; magnitude 1.4; direct motion; 92.0% illuminated. Monday 00:00 UTC snapshot. Ceres: Telescope; magnitude 9.1; direct motion; 97.1% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Jupiter: In solar glare; magnitude -1.9; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Solar conjunction in ecliptic longitude Jun 24 15:17 UTC. Conjunction with Moon in ecliptic longitude Jun 25 09:33 UTC. Saturn: Naked eye; magnitude 1.0; direct motion; 99.7% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Uranus: Binoculars; magnitude 5.8; direct motion; 100.0% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Jun 23 01:50 UTC. Neptune: Telescope; magnitude 7.8; direct motion; 100.0% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Pluto: Substantial telescope; magnitude 14.4; retrograde motion; 100.0% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot.

Binoculars: Trace Circinus’s charted figure in the finder, then identify β Cir at its charted position. Trace Corona Borealis’s charted figure in the finder, then identify Nusakan at its charted position.

Beta Circini: A Stellar Beacon in the Constellation Cir — Discover the characteristics and significance of Beta Cir, a notable star within the constellation Cir.

Nusakan: A Bright Beacon in the Constellation Corvus — Discover the characteristics and significance of Nusakan, a notable star in the constellation Crater, with insights into its position and role in celestial navigation.

Small telescope: Spindle Galaxy: consult its dedicated finder and observing story for equipment guidance; Splinter Galaxy: consult its dedicated finder and observing story for equipment guidance; M5: consult its dedicated finder and observing story for equipment guidance

The Spindle Galaxy: A Distant Eye in the Draconid Sky — Unveiling the beauty and scientific significance of one of the distant spiral giants in the constellation Draco.

The Splinter Galaxy: A Diminutive Wonder in Draco — An overview of the intriguing galaxy known as the Splinter Galaxy, situated in the constellation Draco.

M5: A Sharply Focused Glimpse into the Heart of the Serpent — Discover the timeless beauty of Messier 5, a majestic globular cluster in Serpentarius that continues to captivate astronomers and stargazers alike.

Substantial telescope: No fixed-sky Calendar object is classified as requiring a substantial telescope this week.

Other objects listed this week: None

Mercury

Mercury: naked eye at the Monday 00:00 UTC snapshot. At 45°N and 21:00 local apparent solar time, it is 3.0° above the horizon. Rises 05:56; sets 21:24 (45°N, local apparent solar time). Visual magnitude -0.0. The disk is 60.5% illuminated (gibbous). It is 23.0° from the Sun, on its east side. Motion is direct at 1.474° per day in ecliptic longitude at the snapshot. Position reference: Pollux, 5.2° away. Conjunction with Moon in ecliptic longitude Jun 27 07:12 UTC. Mercury: 5.2° from Pollux in the Pathfinder.

Venus

Venus: naked eye at the Monday 00:00 UTC snapshot. At 45°N and 21:00 local apparent solar time, it is 30.7° below the horizon. Rises 01:52; sets 15:58 (45°N, local apparent solar time). Visual magnitude -4.2. The disk is 60.3% illuminated (gibbous). It is 44.5° from the Sun, on its west side. Motion is direct at 1.068° per day in ecliptic longitude at the snapshot. Position reference: Menkar, 10.2° away. Venus: 10.2° from Menkar in the Pathfinder.

Moon

Moon: naked eye at the Monday 00:00 UTC snapshot. At 45°N and 21:00 local apparent solar time, it is 20.5° below the horizon. Rises 01:41; sets 17:22 (45°N, local apparent solar time). Visual magnitude -7.2. The disk is 8.5% illuminated (waning crescent). It is 33.9° from the Sun, on its west side. Motion is direct at 14.796° per day in ecliptic longitude at the snapshot. Position reference: Aldebaran, 15.6° away. Uranus is 4.9° away at the snapshot. Solar conjunction in ecliptic longitude Jun 25 10:31 UTC. Conjunction with Mercury in ecliptic longitude Jun 27 07:12 UTC. Conjunction with Jupiter in ecliptic longitude Jun 25 09:33 UTC. Conjunction with Uranus in ecliptic longitude Jun 23 01:50 UTC. Moon: 15.6° from Aldebaran in the Pathfinder.

Mars

Mars: naked eye at the Monday 00:00 UTC snapshot. At 45°N and 21:00 local apparent solar time, it is 21.2° above the horizon. Rises 09:24; sets 23:05 (45°N, local apparent solar time). Visual magnitude 1.4. The disk is 92.0% illuminated (gibbous). It is 61.4° from the Sun, on its east side. Motion is direct at 0.568° per day in ecliptic longitude at the snapshot. Position reference: Regulus, 3.1° away. Mars: 3.1° from Regulus in the Pathfinder.

Jupiter

Jupiter: in solar glare at the Monday 00:00 UTC snapshot. Rises 04:19; sets 19:51 (45°N, local apparent solar time). Visual magnitude -1.9. The disk is 100.0% illuminated (nearly full). It is 1.2° from the Sun, on its east side. Motion is direct at 0.229° per day in ecliptic longitude at the snapshot. Position reference: Alhena, 9.2° away. Solar conjunction in ecliptic longitude Jun 24 15:17 UTC. Conjunction with Moon in ecliptic longitude Jun 25 09:33 UTC. Jupiter: 9.2° from Alhena in the Pathfinder.

Saturn

Saturn: naked eye at the Monday 00:00 UTC snapshot. At 45°N and 21:00 local apparent solar time, it is 31.5° below the horizon. Rises 00:05; sets 11:59 (45°N, local apparent solar time). Visual magnitude 1.0. The disk is 99.7% illuminated (nearly full). It is 90.2° from the Sun, on its west side. Motion is direct at 0.034° per day in ecliptic longitude at the snapshot. Position reference: Fumalsamakah, 16.9° away. Neptune is 1.0° away at the snapshot. Saturn: 16.9° from Fumalsamakah in the Pathfinder.

Uranus

Uranus: binoculars at the Monday 00:00 UTC snapshot. At 45°N and 21:00 local apparent solar time, it is 24.6° below the horizon. Rises 02:13; sets 17:08 (45°N, local apparent solar time). Visual magnitude 5.8. The disk is 100.0% illuminated (nearly full). It is 32.5° from the Sun, on its west side. Motion is direct at 0.051° per day in ecliptic longitude at the snapshot. Position reference: Aldebaran, 12.0° away. Moon is 4.9° away at the snapshot. Conjunction with Moon in ecliptic longitude Jun 23 01:50 UTC. Uranus: 12.0° from Aldebaran in the Pathfinder.

Neptune

Neptune: telescope at the Monday 00:00 UTC snapshot. At 45°N and 21:00 local apparent solar time, it is 30.7° below the horizon. Rises 00:01; sets 12:04 (45°N, local apparent solar time). Visual magnitude 7.8. The disk is 100.0% illuminated (nearly full). It is 89.7° from the Sun, on its west side. Motion is direct at 0.006° per day in ecliptic longitude at the snapshot. Position reference: Fumalsamakah, 16.7° away. Saturn is 1.0° away at the snapshot. Neptune: 16.7° from Fumalsamakah in the Pathfinder.

Ceres

Ceres: telescope at the Monday 00:00 UTC snapshot. At 45°N and 21:00 local apparent solar time, it is 41.4° below the horizon. Rises 01:08; sets 12:27 (45°N, local apparent solar time). Visual magnitude 9.1. The disk is 97.1% illuminated (gibbous). It is 81.5° from the Sun, on its west side. Motion is direct at 0.231° per day in ecliptic longitude at the snapshot. Position reference: Diphda, 12.4° away. Ceres: 12.4° from Diphda in the Pathfinder.

Pluto

Pluto: substantial telescope at the Monday 00:00 UTC snapshot. At 45°N and 21:00 local apparent solar time, it is 9.2° below the horizon. Rises 21:55; sets 06:41 (45°N, local apparent solar time). Visual magnitude 14.4. The disk is 100.0% illuminated (nearly full). It is 148.3° from the Sun, on its west side. Motion is retrograde at 0.019° per day in ecliptic longitude at the snapshot. Position reference: Dabih, 8.4° away. Pluto: 8.4° from Dabih in the Pathfinder.