ISO 2025-W49
Week begins: Monday, December 1, 2025
Calendar
| Date | Zodiac day | Events |
|---|---|---|
| Mon, Dec 1, 2025 | ♐ 10 | C8 / NGC 559 —  10 9.5 — Northern Autumn |
| Tue, Dec 2, 2025 | ♐ 11 | M103 — 7 7.4 — Northern AutumnM33 — 6 5.7 — Northern Autumn |
| Wed, Dec 3, 2025 | ♐ 12 | M74 — 9 9.4 — Tropical AutumnAchernar (α Eri) —  0 0.5 — Southern Autumn |
| Thu, Dec 4, 2025 | ♐ 13 | 🌕 Full Moon · Moon Before Yule — 23:14:05 UTC M76 — 10 10.1 — Northern Autumn |
| Fri, Dec 5, 2025 | ♐ 14 | C10 / NGC 663 / Finest NGC 9 / NGC 663 · Collinder 20 — 7 7.1 — Northern Autumn |
| Sat, Dec 6, 2025 | ♐ 15 | Mothallah (α Tri) — 3 3.4 — Northern Autumn |
| Sun, Dec 7, 2025 | ♐ 16 | Sheratan (β Ari) — 3 2.6 — Tropical Autumn |
Weekly Solar-System Ephemeris
Snapshot: Week begins December 1, 2025, 00:00 UTC.
(-90° to +90°; defaults +45°, 21:00 LAT)
| Body | ☉︎ | ☽︎ | ☿︎ | ♀︎ | ♂︎ | ♃︎ | ♄︎ |
|---|---|---|---|---|---|---|---|
| Ecliptic | ♐︎ 9°02′ β +0°00′ | ♈︎ 13°27′ β +2°27′ | ♏︎ 20°51′ β +2°36′ | ♐︎ 0°12′ β +0°42′ | ♐︎ 19°18′ β −0°40′ | ♋︎ 24°32′ β +0°10′ | ♓︎ 25°10′ β −2°22′ |
| Observing |  | -11.4 | ☉︎ | ☉︎ | ☉︎ | -2.5 | 0.9 |
| Rise | 07:29 | 13:43 | 05:48 | 06:42 | 08:24 | 19:40 | 13:31 |
| Set | 16:31 | 02:50 | 15:47 | 16:04 | 17:04 | 10:53 | 01:03 |
Extended targets:
| Body | ⚳︎ | ♅︎ | ♆︎ | ♇︎ |
|---|---|---|---|---|
| Ecliptic | ♈︎ 2°46′ β −11°14′ | ♉︎ 29°03′ β −0°12′ | ♓︎ 29°24′ β −1°21′ | ♒︎ 1°54′ β −3°46′ |
| Observing | 8.5 |  5.6 | 7.7 | 14.6 |
| Rise | 14:34 | 15:51 | 13:34 | 11:30 |
| Set | 01:24 | 06:46 | 01:28 | 20:12 |
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 20:22:51 UTC
ISO 2025-W49 runs from December 1 through December 7. Venus is about 2.4° in ecliptic longitude from Dschubba in Scorpius. Ceres and Neptune are separated by about 3.4° in geocentric ecliptic longitude at the Monday 00:00 UTC snapshot.
Naked eye: 🌕 Full Moon · Moon Before Yule — 23:14:05 UTC. Bright moonlight favors prominent stars and planets while reducing contrast on faint deep-sky objects. Use Achernar, Mothallah, Sheratan as the week’s fixed-sky framework.
Planets: Moon: Naked eye; magnitude -11.4; direct motion; 78.3% illuminated. Monday 00:00 UTC snapshot. Opposition in ecliptic longitude Dec 04 23:14 UTC. Conjunction with Jupiter in ecliptic longitude Dec 07 16:51 UTC. Conjunction with Uranus in ecliptic longitude Dec 04 01:07 UTC. Mercury: In solar glare; magnitude 0.0; direct motion; 35.7% illuminated. Monday 00:00 UTC snapshot. Venus: In solar glare; magnitude -3.9; direct motion; 98.9% illuminated. Monday 00:00 UTC snapshot. Mars: In solar glare; magnitude 1.3; direct motion; 99.6% illuminated. Monday 00:00 UTC snapshot. Ceres: Telescope; magnitude 8.5; direct motion; 97.5% illuminated. Monday 00:00 UTC snapshot. Jupiter: Naked eye; magnitude -2.5; retrograde motion; 99.5% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Dec 07 16:51 UTC. Saturn: Naked eye; magnitude 0.9; direct motion; 99.8% illuminated. Monday 00:00 UTC snapshot. Uranus: Binoculars; magnitude 5.6; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Dec 04 01:07 UTC. Neptune: Telescope; magnitude 7.7; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Pluto: Substantial telescope; magnitude 14.6; direct 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: NGC 559: consult its dedicated finder and observing story for equipment guidance; M103: consult its dedicated finder and observing story for equipment guidance; Triangulum Galaxy: consult its dedicated finder and observing story for equipment guidance; M74: consult its dedicated finder and observing story for equipment guidance; Little Dumbbell Nebula: consult its dedicated finder and observing story for equipment guidance; Collinder 20: 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 05:48; sets 15:47 (45°N, local apparent solar time). Visual magnitude 0.0. The disk is 35.7% illuminated (crescent). It is 18.4° from the Sun, on its west side. Motion is direct at 0.216° per day in ecliptic longitude at the snapshot. Position reference: Zubenelgenubi, 5.9° away. Mercury: 5.9° from Zubenelgenubi in the Pathfinder.
Venus
Venus: in solar glare at the Monday 00:00 UTC snapshot. Rises 06:42; sets 16:04 (45°N, local apparent solar time). Visual magnitude -3.9. The disk is 98.9% illuminated (gibbous). It is 8.9° from the Sun, on its west side. Motion is direct at 1.257° per day in ecliptic longitude at the snapshot. Position reference: Acrab, 3.4° away. Venus: 3.4° from Acrab 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 51.3° above the horizon. Rises 13:43; sets 02:50 (45°N, local apparent solar time). Visual magnitude -11.4. The disk is 78.3% illuminated (waxing gibbous). It is 124.4° from the Sun, on its east side. Motion is direct at 14.337° per day in ecliptic longitude at the snapshot. Position reference: Alrescha, 19.9° away. Opposition in ecliptic longitude Dec 04 23:14 UTC. Conjunction with Jupiter in ecliptic longitude Dec 07 16:51 UTC. Conjunction with Uranus in ecliptic longitude Dec 04 01:07 UTC. Moon: 19.9° from Alrescha in the Pathfinder.
Mars
Mars: in solar glare at the Monday 00:00 UTC snapshot. Rises 08:24; sets 17:04 (45°N, local apparent solar time). Visual magnitude 1.3. The disk is 99.6% illuminated (nearly full). It is 10.3° from the Sun, on its east side. Motion is direct at 0.742° per day in ecliptic longitude at the snapshot. Position reference: Sabik, 7.9° away. Mars: 7.9° from Sabik 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 12.2° above the horizon. Rises 19:40; sets 10:53 (45°N, local apparent solar time). Visual magnitude -2.5. The disk is 99.5% illuminated (nearly full). It is 134.5° from the Sun, on its west side. Motion is retrograde at 0.063° per day in ecliptic longitude at the snapshot. Position reference: Pollux, 6.6° away. Conjunction with Moon in ecliptic longitude Dec 07 16:51 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 35.6° above the horizon. Rises 13:31; sets 01:03 (45°N, local apparent solar time). Visual magnitude 0.9. The disk is 99.8% illuminated (nearly full). It is 106.1° from the Sun, on its east side. Motion is direct at 0.005° per day in ecliptic longitude at the snapshot. Position reference: Fumalsamakah, 13.0° away. Neptune is 4.4° away at the snapshot. Saturn: 13.0° 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 51.8° above the horizon. Rises 15:51; sets 06:46 (45°N, local apparent solar time). Visual magnitude 5.6. The disk is 100.0% illuminated (nearly full). It is 170.0° from the Sun, on its east side. Motion is retrograde at 0.041° per day in ecliptic longitude at the snapshot. Position reference: Aldebaran, 12.3° away. Conjunction with Moon in ecliptic longitude Dec 04 01:07 UTC. Uranus: 12.3° 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 39.3° above the horizon. Rises 13:34; sets 01:28 (45°N, local apparent solar time). Visual magnitude 7.7. The disk is 100.0% illuminated (nearly full). It is 110.4° from the Sun, on its east side. Motion is retrograde at 0.005° per day in ecliptic longitude at the snapshot. Position reference: Fumalsamakah, 14.7° away. Saturn is 4.4° away at the snapshot. Neptune: 14.7° 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 33.9° above the horizon. Rises 14:34; sets 01:24 (45°N, local apparent solar time). Visual magnitude 8.5. The disk is 97.5% illuminated (gibbous). It is 113.2° from the Sun, on its east side. Motion is direct at 0.056° per day in ecliptic longitude at the snapshot. Position reference: Diphda, 9.6° away. Ceres: 9.6° 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 8.0° below the horizon. Rises 11:30; sets 20:12 (45°N, local apparent solar time). Visual magnitude 14.6. The disk is 100.0% illuminated (nearly full). It is 53.0° from the Sun, on its east side. Motion is direct at 0.021° per day in ecliptic longitude at the snapshot. Position reference: Dabih, 8.7° away. Pluto: 8.7° from Dabih in the Pathfinder.
Highlights
Mercury
In solar glare; magnitude 0.0; direct motion; 35.7% illuminated. Monday 00:00 UTC snapshot. Mercury: 5.9° from Zubenelgenubi in the Pathfinder.
Venus
In solar glare; magnitude -3.9; direct motion; 98.9% illuminated. Monday 00:00 UTC snapshot. Venus: 3.4° from Acrab in the Pathfinder.
Moon
Naked eye; magnitude -11.4; direct motion; 78.3% illuminated. Monday 00:00 UTC snapshot. Opposition in ecliptic longitude Dec 04 23:14 UTC. Conjunction with Jupiter in ecliptic longitude Dec 07 16:51 UTC. Conjunction with Uranus in ecliptic longitude Dec 04 01:07 UTC. Moon: 19.9° from Alrescha in the Pathfinder.
Mars
In solar glare; magnitude 1.3; direct motion; 99.6% illuminated. Monday 00:00 UTC snapshot. Mars: 7.9° from Sabik in the Pathfinder.
Jupiter
Naked eye; magnitude -2.5; retrograde motion; 99.5% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Dec 07 16:51 UTC. Jupiter: 6.6° from Pollux in the Pathfinder.
Saturn
Naked eye; magnitude 0.9; direct motion; 99.8% illuminated. Monday 00:00 UTC snapshot. Saturn: 13.0° from Fumalsamakah in the Pathfinder.
Uranus
Binoculars; magnitude 5.6; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Dec 04 01:07 UTC. Uranus: 12.3° from Aldebaran in the Pathfinder.
Neptune
Telescope; magnitude 7.7; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Neptune: 14.7° from Fumalsamakah in the Pathfinder.
Ceres
Telescope; magnitude 8.5; direct motion; 97.5% illuminated. Monday 00:00 UTC snapshot. Ceres: 9.6° from Diphda in the Pathfinder.
Pluto
Substantial telescope; magnitude 14.6; direct motion; 100.0% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Pluto: 8.7° from Dabih in the Pathfinder.