Star Almanack
Alexander Ferrari Miller

ISO 2027-W22

Week begins: Monday, May 31, 2027

Notation:

Calendar

DateZodiac dayEvents
Mon, May 31, 2027♊ 11
M51 — Telescope 8 — Northern Spring
Tue, Jun 1, 2027♊ 12
Wed, Jun 2, 2027♊ 13
M83 — Telescope 8 — Southern Spring
C45 / NGC 5248 — Telescope 10 — Tropical Spring
ε Cen — Naked eye 2 — Southern Spring
Thu, Jun 3, 2027♊ 14
M3 — Telescope 6 — Northern Spring
Fri, Jun 4, 2027♊ 15
🌑 New Moon — 19:40:21 UTC
C84 / NGC 5286 — Telescope 8 — Southern Spring
Alkaid (η UMa) — Naked eye 2 — Northern Spring
Sat, Jun 5, 2027♊ 16
Sun, Jun 6, 2027♊ 17

Weekly Solar-System Ephemeris

Snapshot: Week begins May 31, 2027, 00:00 UTC.

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

Notation:
Body☉︎☽︎☿︎♀︎♂︎♃︎♄︎
Ecliptic♊︎ 9°21′
β +0°00′		♈︎ 7°05′
β +4°05′		♋︎ 2°00′
β +1°35′		♉︎ 19°37′
β −1°16′		♍︎ 6°43′
β +1°18′		♌︎ 20°17′
β +0°57′		♈︎ 23°57′
β −2°19′
ObservingNightNaked eye -8.9Naked eye 0.7☉︎Naked eye 0.7Naked eye -1.9Naked eye 0.7
Rise04:2001:2005:4303:2811:2009:5202:30
Set19:4014:1821:3317:5100:5100:1015:33

Extended targets:

Body⚳︎♅︎♆︎♇︎
Ecliptic♌︎ 3°32′
β +7°57′		♊︎ 5°59′
β −0°06′		♈︎ 6°14′
β −1°23′		♒︎ 7°04′
β −4°38′
ObservingTelescope 8.8☉︎Telescope 7.8TelescopeTelescope 14.5
Rise07:5304:1101:4723:49
Set00:0919:2014:0208:35

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 2026-10-22 12:17:59 UTC

View:

ISO 2027-W22 runs from May 31 through June 6. Uranus is about 3.8° in ecliptic longitude from Aldebaran in Taurus.

Naked eye: 🌑 New Moon — 19:40:21 UTC. The dark Moon favors faint targets and extended star fields. Use Epsilon Cen, Alkaid as the week’s fixed-sky framework.

Bright Star in Centaurus: A Stellar Beacon — An exploration of a notable star in the constellation Centaurus, highlighting its characteristics and significance.

Alkaid: The Bright Star of the Big Dipper's Handle — An illuminating beacon in the night sky, Alkaid guides stargazers with its distinctive brightness and position.

Planets: Moon: Naked eye; magnitude -8.9; direct motion; 26.9% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Solar conjunction in ecliptic longitude Jun 04 19:40 UTC. Conjunction with Mercury in ecliptic longitude Jun 06 06:40 UTC. Conjunction with Venus in ecliptic longitude Jun 03 10:23 UTC. Conjunction with Saturn in ecliptic longitude Jun 01 07:02 UTC. Conjunction with Uranus in ecliptic longitude Jun 04 07:00 UTC. Mercury: Naked eye; magnitude 0.7; direct motion; 31.3% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Jun 06 06:40 UTC. Venus: In solar glare; magnitude -3.9; direct motion; 94.0% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Jun 03 10:23 UTC. Mars: Naked eye; magnitude 0.7; direct motion; 89.2% illuminated. Monday 00:00 UTC snapshot. Ceres: Telescope; magnitude 8.8; direct motion; 97.3% illuminated. Monday 00:00 UTC snapshot. Jupiter: Naked eye; magnitude -1.9; direct motion; 99.2% illuminated. Monday 00:00 UTC snapshot. Saturn: Naked eye; magnitude 0.7; direct motion; 99.9% 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 01 07:02 UTC. Uranus: In solar glare; magnitude 5.8; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Jun 04 07:00 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 14.5; retrograde motion; 100.0% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot.

Binoculars: No fixed-sky Calendar object is classified for binocular observing this week.

Small telescope: Whirlpool Galaxy: consult its dedicated finder and observing story for equipment guidance; Southern Pinwheel: consult its dedicated finder and observing story for equipment guidance; NGC 5248: consult its dedicated finder and observing story for equipment guidance; M3: consult its dedicated finder and observing story for equipment guidance; NGC 5286: consult its dedicated finder and observing story for equipment guidance

The Whirlpool Galaxy: A Cosmic Whirlpool in Canes Venatici — An enduring emblem of galaxy interactions, the Whirlpool Galaxy offers astronomers a mesmerizing glimpse into celestial dynamics.

M83: The Southern Pinwheel Galaxy—A Cosmic Spiral in Hydra — An enduring wonder in the southern skies, M83 invites explorers into its majestic spiral arms, revealing the dynamic beauty of a barred galaxy.

Exploring Caldwell C45: A Galaxy Hidden in Boo — Discover the intriguing characteristics of Caldwell C45, a potential galaxy in the constellation Boo, and its significance in astronomical observations.

M3: A Pinnacle of Stellar Aggregation in Canes Venatici — Discover the intrinsic beauty and significance of the globular cluster M3, an enduring jewel of the night sky in the constellation Canes Venatici.

Caldwell 84: A Glimpse into a Globular Cluster in Centaurus — An enduring celestial gem, Caldwell 84 offers a glimpse into the ancient heart of our galaxy.

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 4.3° above the horizon. Rises 05:43; sets 21:33 (45°N, local apparent solar time). Visual magnitude 0.7. The disk is 31.3% illuminated (crescent). It is 22.7° from the Sun, on its east side. Motion is direct at 0.796° per day in ecliptic longitude at the snapshot. Position reference: Elnath, 9.8° away. Conjunction with Moon in ecliptic longitude Jun 06 06:40 UTC. Mercury: 9.8° from Elnath in the Pathfinder.

Venus

Venus: in solar glare at the Monday 00:00 UTC snapshot. Rises 03:28; sets 17:51 (45°N, local apparent solar time). Visual magnitude -3.9. The disk is 94.0% illuminated (gibbous). It is 19.8° from the Sun, on its west side. Motion is direct at 1.218° per day in ecliptic longitude at the snapshot. Position reference: Menkar, 12.3° away. Conjunction with Moon in ecliptic longitude Jun 03 10:23 UTC. Venus: 12.3° 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 36.2° below the horizon. Rises 01:20; sets 14:18 (45°N, local apparent solar time). Visual magnitude -8.9. The disk is 26.9% illuminated (waning crescent). It is 62.3° from the Sun, on its west side. Motion is direct at 12.860° per day in ecliptic longitude at the snapshot. Position reference: Fumalsamakah, 18.7° away. Solar conjunction in ecliptic longitude Jun 04 19:40 UTC. Conjunction with Mercury in ecliptic longitude Jun 06 06:40 UTC. Conjunction with Venus in ecliptic longitude Jun 03 10:23 UTC. Conjunction with Saturn in ecliptic longitude Jun 01 07:02 UTC. Conjunction with Uranus in ecliptic longitude Jun 04 07:00 UTC. Moon: 18.7° from Fumalsamakah 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 39.1° above the horizon. Rises 11:20; sets 00:51 (45°N, local apparent solar time). Visual magnitude 0.7. The disk is 89.2% illuminated (gibbous). It is 87.4° from the Sun, on its east side. Motion is direct at 0.445° per day in ecliptic longitude at the snapshot. Position reference: Regulus, 6.5° away. Mars: 6.5° from Regulus in the Pathfinder.

Jupiter

Jupiter: naked eye at the Monday 00:00 UTC snapshot. At 45°N and 21:00 local apparent solar time, it is 32.4° above the horizon. Rises 09:52; sets 00:10 (45°N, local apparent solar time). Visual magnitude -1.9. The disk is 99.2% illuminated (nearly full). It is 70.9° from the Sun, on its east side. Motion is direct at 0.128° per day in ecliptic longitude at the snapshot. Position reference: Acubens, 8.7° away. Jupiter: 8.7° from Acubens 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 38.0° below the horizon. Rises 02:30; sets 15:33 (45°N, local apparent solar time). Visual magnitude 0.7. The disk is 99.9% illuminated (nearly full). It is 45.5° from the Sun, on its west side. Motion is direct at 0.101° per day in ecliptic longitude at the snapshot. Position reference: Alrescha, 8.9° away. Conjunction with Moon in ecliptic longitude Jun 01 07:02 UTC. Saturn: 8.9° from Alrescha in the Pathfinder.

Uranus

Uranus: in solar glare at the Monday 00:00 UTC snapshot. Rises 04:11; sets 19:20 (45°N, local apparent solar time). Visual magnitude 5.8. The disk is 100.0% illuminated (nearly full). It is 3.4° from the Sun, on its west side. Motion is direct at 0.059° per day in ecliptic longitude at the snapshot. Position reference: Aldebaran, 6.8° away. Conjunction with Moon in ecliptic longitude Jun 04 07:00 UTC. Uranus: 6.8° 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 41.7° below the horizon. Rises 01:47; sets 14:02 (45°N, local apparent solar time). Visual magnitude 7.8. The disk is 100.0% illuminated (nearly full). It is 63.1° from the Sun, on its west side. Motion is direct at 0.021° per day in ecliptic longitude at the snapshot. Position reference: Diphda, 19.7° away. Neptune: 19.7° from Diphda 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 29.2° above the horizon. Rises 07:53; sets 00:09 (45°N, local apparent solar time). Visual magnitude 8.8. The disk is 97.3% illuminated (gibbous). It is 54.6° from the Sun, on its east side. Motion is direct at 0.390° per day in ecliptic longitude at the snapshot. Position reference: Pollux, 9.9° away. Ceres: 9.9° from Pollux 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 28.6° below the horizon. Rises 23:49; sets 08:35 (45°N, local apparent solar time). Visual magnitude 14.5. The disk is 100.0% illuminated (nearly full). It is 122.2° from the Sun, on its west side. Motion is retrograde at 0.010° per day in ecliptic longitude at the snapshot. Position reference: Dabih, 9.6° away. Pluto: 9.6° from Dabih in the Pathfinder.