ISO 2025-W42
Week begins: Monday, October 13, 2025
Calendar
| Date | Zodiac day | Events |
|---|---|---|
| Mon, Oct 13, 2025 | ♎ 22 | 🌗 Last Quarter — 18:12:42 UTC C16 / NGC 7243 —  6 6.4 — Northern Autumn |
| Tue, Oct 14, 2025 | ♎ 23 | α Tuc —  3 2.9 — Southern Autumn |
| Wed, Oct 15, 2025 | ♎ 24 | |
| Thu, Oct 16, 2025 | ♎ 25 | β Lac —  4 4.4 — Northern Autumn — in the Milky Way |
| Fri, Oct 17, 2025 | ♎ 26 | Delta Cephei (δ Cephei) — — Northern AutumnC63 / NGC 7293 · Helix Nebula / Finest NGC 2 / NGC 7293 · Helix — 7 6.5 — Tropical Autumn |
| Sat, Oct 18, 2025 | ♎ 27 | α Lac — 4 3.8 — Northern Autumn — in the Milky Wayβ PsA — 4 4.3 — Southern Autumn |
| Sun, Oct 19, 2025 | ♎ 28 | Finest NGC 3 / NGC 7331 · Deer Lick Group / C30 / NGC 7331 — 10 10.2 — Northern Autumn |
Weekly Solar-System Ephemeris
Snapshot: Week begins October 13, 2025, 00:00 UTC.
(-90° to +90°; defaults +45°, 21:00 LAT)
| Body | ☉︎ | ☽︎ | ☿︎ | ♀︎ | ♂︎ | ♃︎ | ♄︎ |
|---|---|---|---|---|---|---|---|
| Ecliptic | ♎︎ 19°55′ β +0°00′ | ♋︎ 10°12′ β +4°49′ | ♏︎ 9°15′ β −1°31′ | ♍︎ 28°54′ β +1°30′ | ♏︎ 14°06′ β −0°12′ | ♋︎ 23°45′ β +0°03′ | ♓︎ 26°53′ β −2°30′ |
| Observing |  | -10.5 | ☉︎ | -3.9 | 1.5 | -2.2 | 0.7 |
| Rise | 06:26 | 21:20 | 08:14 | 04:34 | 08:37 | 22:52 | 16:51 |
| Set | 17:34 | 13:44 | 18:09 | 16:56 | 18:29 | 14:05 | 04:28 |
Extended targets:
| Body | ⚳︎ | ♅︎ | ♆︎ | ♇︎ |
|---|---|---|---|---|
| Ecliptic | ♈︎ 7°17′ β −14°48′ | ♊︎ 0°55′ β −0°13′ | ♈︎ 0°14′ β −1°22′ | ♒︎ 1°22′ β −3°47′ |
| Observing | 7.7 | 5.6 | 7.7 | 14.5 |
| Rise | 18:18 | 19:12 | 16:52 | 14:44 |
| Set | 04:56 | 10:11 | 04:47 | 23:24 |
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.
Planet Finder
Sky Notes
Kilroy: Sky Notes · generated 2026-10-23 17:45:30 UTC
ISO 2025-W42 runs from October 13 through October 19. Saturn and Neptune are separated by about 3.4° in geocentric ecliptic longitude at the Monday 00:00 UTC snapshot.
Naked eye: 🌗 Last Quarter — 18:12:42 UTC. Moderate moonlight makes timing and local sky position important for faint targets. Use α Tuc as the week’s fixed-sky framework.
Planets: Moon: Naked eye; magnitude -10.5; direct motion; 58.5% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Conjunction with Venus in ecliptic longitude Oct 19 18:25 UTC. Conjunction with Jupiter in ecliptic longitude Oct 13 23:48 UTC. Mercury: In solar glare; magnitude -0.2; direct motion; 85.2% illuminated. Monday 00:00 UTC snapshot. Venus: Naked eye; magnitude -3.9; direct motion; 93.3% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Oct 19 18:25 UTC. Mars: Naked eye; magnitude 1.5; direct motion; 98.2% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Ceres: Telescope; magnitude 7.7; retrograde motion; 99.7% illuminated. Monday 00:00 UTC snapshot. Jupiter: Naked eye; magnitude -2.2; direct motion; 99.1% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Oct 13 23:48 UTC. Saturn: Naked eye; magnitude 0.7; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Uranus: Binoculars; magnitude 5.6; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Neptune: Telescope; magnitude 7.7; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Pluto: Substantial telescope; magnitude 14.5; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Station Oct 14 02:53 UTC: turns direct.
Binoculars: Trace Lacerta’s charted figure in the finder, then identify β Lac at its charted position. Trace Lacerta’s charted figure in the finder, then identify α Lac at its charted position. Trace Piscis Austrinus’s closed figure in the finder, then identify β PsA at its charted position.
Small telescope: NGC 7243: consult its dedicated finder and observing story for equipment guidance; Helix Nebula: consult its dedicated finder and observing story for equipment guidance; Deer Lick Group: consult its dedicated finder and observing story for equipment guidance
Substantial telescope: No fixed-sky Calendar object is classified as requiring a substantial telescope this week.
Other objects listed this week: None
Mercury
Mercury: in solar glare at the Monday 00:00 UTC snapshot. Rises 08:14; sets 18:09 (45°N, local apparent solar time). Visual magnitude -0.2. The disk is 85.2% illuminated (gibbous). It is 19.4° from the Sun, on its east side. Motion is direct at 1.422° per day in ecliptic longitude at the snapshot. Position reference: Zubenelgenubi, 6.5° away. Mercury: 6.5° from Zubenelgenubi 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 37.6° below the horizon. Rises 04:34; sets 16:56 (45°N, local apparent solar time). Visual magnitude -3.9. The disk is 93.3% illuminated (gibbous). It is 21.1° from the Sun, on its west side. Motion is direct at 1.240° per day in ecliptic longitude at the snapshot. Position reference: Zavijava, 1.6° away. Conjunction with Moon in ecliptic longitude Oct 19 18:25 UTC. Venus: 1.6° from Zavijava 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 3.1° below the horizon. Rises 21:20; sets 13:44 (45°N, local apparent solar time). Visual magnitude -10.5. The disk is 58.5% illuminated (waning gibbous). It is 99.7° from the Sun, on its west side. Motion is direct at 13.940° per day in ecliptic longitude at the snapshot. Position reference: Castor, 11.6° away. Conjunction with Venus in ecliptic longitude Oct 19 18:25 UTC. Conjunction with Jupiter in ecliptic longitude Oct 13 23:48 UTC. Moon: 11.6° from Castor 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 26.7° below the horizon. Rises 08:37; sets 18:29 (45°N, local apparent solar time). Visual magnitude 1.5. The disk is 98.2% illuminated (gibbous). It is 24.2° from the Sun, on its east side. Motion is direct at 0.693° per day in ecliptic longitude at the snapshot. Position reference: Zubenelgenubi, 1.4° away. Mars: 1.4° from Zubenelgenubi 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 15.2° below the horizon. Rises 22:52; sets 14:05 (45°N, local apparent solar time). Visual magnitude -2.2. The disk is 99.1% illuminated (nearly full). It is 86.2° from the Sun, on its west side. Motion is direct at 0.092° per day in ecliptic longitude at the snapshot. Position reference: Pollux, 6.6° away. Conjunction with Moon in ecliptic longitude Oct 13 23:48 UTC. Jupiter: 6.6° from Pollux 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 36.5° above the horizon. Rises 16:51; sets 04:28 (45°N, local apparent solar time). Visual magnitude 0.7. The disk is 100.0% illuminated (nearly full). It is 156.9° from the Sun, on its east side. Motion is retrograde at 0.068° per day in ecliptic longitude at the snapshot. Position reference: Fumalsamakah, 14.0° away. Neptune is 3.5° away at the snapshot. Saturn: 14.0° 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 17.2° above the horizon. Rises 19:12; sets 10:11 (45°N, local apparent solar time). Visual magnitude 5.6. The disk is 100.0% illuminated (nearly full). It is 139.0° from the Sun, on its west side. Motion is retrograde at 0.028° per day in ecliptic longitude at the snapshot. Position reference: Aldebaran, 10.6° away. Uranus: 10.6° 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 37.7° above the horizon. Rises 16:52; sets 04:47 (45°N, local apparent solar time). Visual magnitude 7.7. The disk is 100.0% illuminated (nearly full). It is 160.3° from the Sun, on its east side. Motion is retrograde at 0.026° per day in ecliptic longitude at the snapshot. Position reference: Fumalsamakah, 15.3° away. Saturn is 3.5° away at the snapshot. Neptune: 15.3° 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 23.9° above the horizon. Rises 18:18; sets 04:56 (45°N, local apparent solar time). Visual magnitude 7.7. The disk is 99.7% illuminated (nearly full). It is 160.6° from the Sun, on its east side. Motion is retrograde at 0.214° per day in ecliptic longitude at the snapshot. Position reference: Diphda, 7.3° away. Ceres: 7.3° 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 16.5° above the horizon. Rises 14:44; sets 23:24 (45°N, local apparent solar time). Visual magnitude 14.5. The disk is 100.0% illuminated (nearly full). It is 101.4° from the Sun, on its east side. Motion is retrograde at 0.001° per day in ecliptic longitude at the snapshot. Position reference: Dabih, 8.9° away. Station Oct 14 02:53 UTC: turns direct. Pluto: 8.9° from Dabih in the Pathfinder.
Highlights
Mercury
In solar glare; magnitude -0.2; direct motion; 85.2% illuminated. Monday 00:00 UTC snapshot. Mercury: 6.5° from Zubenelgenubi in the Pathfinder.
Venus
Naked eye; magnitude -3.9; direct motion; 93.3% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Oct 19 18:25 UTC. Venus: 1.6° from Zavijava in the Pathfinder.
Moon
Naked eye; magnitude -10.5; direct motion; 58.5% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Conjunction with Venus in ecliptic longitude Oct 19 18:25 UTC. Conjunction with Jupiter in ecliptic longitude Oct 13 23:48 UTC. Moon: 11.6° from Castor in the Pathfinder.
Mars
Naked eye; magnitude 1.5; direct motion; 98.2% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Mars: 1.4° from Zubenelgenubi in the Pathfinder.
Jupiter
Naked eye; magnitude -2.2; direct motion; 99.1% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Oct 13 23:48 UTC. Jupiter: 6.6° from Pollux in the Pathfinder.
Saturn
Naked eye; magnitude 0.7; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Saturn: 14.0° from Fumalsamakah in the Pathfinder.
Uranus
Binoculars; magnitude 5.6; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Uranus: 10.6° from Aldebaran in the Pathfinder.
Neptune
Telescope; magnitude 7.7; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Neptune: 15.3° from Fumalsamakah in the Pathfinder.
Ceres
Telescope; magnitude 7.7; retrograde motion; 99.7% illuminated. Monday 00:00 UTC snapshot. Ceres: 7.3° from Diphda in the Pathfinder.
Pluto
Substantial telescope; magnitude 14.5; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Station Oct 14 02:53 UTC: turns direct. Pluto: 8.9° from Dabih in the Pathfinder.