ISO 2027-W01
Week begins: Monday, January 4, 2027
Calendar
| Date | Zodiac day | Events |
|---|---|---|
| Mon, Jan 4, 2027 | ♑ 15 | |
| Tue, Jan 5, 2027 | ♑ 16 | Finest NGC 19 / NGC 1491 · Sh 2-206 —  — Northern Winter |
| Wed, Jan 6, 2027 | ♑ 17 | Finest NGC 20 / NGC 1501 · PN G144.5+06.5 — 12 12.0 — Northern Winter |
| Thu, Jan 7, 2027 | ♑ 18 | 🌑 New Moon — 20:24:23 UTC Finest NGC 23 / NGC 1514 · Crystal Ball Nebula — 11 10.8 — Northern Winter |
| Fri, Jan 8, 2027 | ♑ 19 | α Hor —  4 3.9 — Southern WinterFinest NGC 22 / NGC 1535 · Cleopatra's Eye — 9 9.4 — Tropical Winterα Ret —  3 3.3 — Southern Winter40 Eridani B (ο² Eridani B) — — Tropical Winter |
| Sat, Jan 9, 2027 | ♑ 20 | |
| Sun, Jan 10, 2027 | ♑ 21 |
Weekly Solar-System Ephemeris
Snapshot: Week begins January 4, 2027, 00:00 UTC.
(-90° to +90°; defaults +45°, 21:00 LAT)
| Body | ☉︎ | ☽︎ | ☿︎ | ♀︎ | ♂︎ | ♃︎ | ♄︎ |
|---|---|---|---|---|---|---|---|
| Ecliptic | ♑︎ 13°23′ β −0°00′ | ♐︎ 1°32′ β −5°05′ | ♑︎ 14°44′ β −1°54′ | ♏︎ 26°31′ β +3°23′ | ♍︎ 10°10′ β +3°23′ | ♌︎ 26°15′ β +0°57′ | ♈︎ 8°27′ β −2°27′ |
| Observing |  | -7.6 | ☉︎ | -4.5 | -0.2 | -2.4 | 0.7 |
| Rise | 07:34 | 04:44 | 07:51 | 03:45 | 21:06 | 19:57 | 11:30 |
| Set | 16:26 | 13:06 | 16:22 | 13:39 | 10:42 | 09:58 | 23:44 |
Extended targets:
| Body | ⚳︎ | ♅︎ | ♆︎ | ♇︎ |
|---|---|---|---|---|
| Ecliptic | ♋︎ 18°06′ β +7°25′ | ♊︎ 2°13′ β −0°08′ | ♈︎ 1°45′ β −1°23′ | ♒︎ 4°26′ β −4°16′ |
| Observing | 6.8 | 5.6 | 7.8 | 14.6 |
| Rise | 16:02 | 13:32 | 11:10 | 09:12 |
| Set | 08:48 | 04:34 | 23:11 | 17:55 |
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 2026-10-22 04:49:19 UTC
ISO 2027-W01 runs from January 4 through January 10. To find Mercury, first identify Sagittarius, trace the Teapot of Sagittarius, and locate Nunki in that pattern. Mercury lies about 2.3° away in ecliptic longitude at the Monday 00:00 UTC snapshot; use the finder to transfer from Nunki to the planet. To find Jupiter, first identify Leo, trace the Sickle, and locate Regulus in that pattern. Jupiter lies about 3.6° 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 — 20:24:23 UTC. The dark Moon favors faint targets and extended star fields. Use α Ret as the week’s fixed-sky framework.
Planets: Moon: Naked eye; magnitude -7.6; direct motion; 13.0% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Solar conjunction in ecliptic longitude Jan 07 20:24 UTC. Conjunction with Mercury in ecliptic longitude Jan 08 05:10 UTC. Conjunction with Pluto in ecliptic longitude Jan 09 07:30 UTC. Mercury: In solar glare; magnitude -1.3; direct motion; 99.8% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Jan 08 05:10 UTC. Venus: Naked eye; magnitude -4.5; direct motion; 50.3% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Mars: Naked eye; magnitude -0.2; direct motion; 93.3% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Station Jan 10 12:59 UTC: turns retrograde. Ceres: Binoculars; magnitude 6.8; retrograde motion; 99.9% illuminated. Monday 00:00 UTC snapshot. Opposition in ecliptic longitude Jan 07 18:06 UTC. Jupiter: Naked eye; magnitude -2.4; retrograde motion; 99.6% illuminated. Monday 00:00 UTC snapshot. Saturn: Naked eye; magnitude 0.7; direct motion; 99.7% illuminated. Monday 00:00 UTC snapshot. Uranus: Binoculars; magnitude 5.6; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Neptune: Telescope; magnitude 7.8; direct 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. Conjunction with Moon in ecliptic longitude Jan 09 07:30 UTC.
Binoculars: Trace Horologium’s charted figure in the finder, then identify α Hor at its charted position.
Small telescope: Sh 2-206: consult its dedicated finder and observing story for equipment guidance; PN G144.5+06.5: consult its dedicated finder and observing story for equipment guidance; Crystal Ball Nebula: consult its dedicated finder and observing story for equipment guidance; Cleopatra's Eye: consult its dedicated finder and observing story for equipment guidance; 40 Eridani B: 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 07:51; sets 16:22 (45°N, local apparent solar time). Visual magnitude -1.3. The disk is 99.8% illuminated (nearly full). It is 2.3° from the Sun, on its east side. Motion is direct at 1.621° per day in ecliptic longitude at the snapshot. Position reference: Nunki, 2.5° away. Conjunction with Moon in ecliptic longitude Jan 08 05:10 UTC. Mercury: 2.5° from Nunki 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 60.7° below the horizon. Rises 03:45; sets 13:39 (45°N, local apparent solar time). Visual magnitude -4.5. The disk is 50.3% illuminated (half-lit). It is 46.9° from the Sun, on its west side. Motion is direct at 1.021° per day in ecliptic longitude at the snapshot. Position reference: Acrab, 7.4° away. Venus: 7.4° 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 70.3° below the horizon. Rises 04:44; sets 13:06 (45°N, local apparent solar time). Visual magnitude -7.6. The disk is 13.0% illuminated (waning crescent). It is 42.1° from the Sun, on its west side. Motion is direct at 12.041° per day in ecliptic longitude at the snapshot. Position reference: Dschubba, 3.4° away. Solar conjunction in ecliptic longitude Jan 07 20:24 UTC. Conjunction with Mercury in ecliptic longitude Jan 08 05:10 UTC. Conjunction with Pluto in ecliptic longitude Jan 09 07:30 UTC. Moon: 3.4° from Dschubba 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 1.5° below the horizon. Rises 21:06; sets 10:42 (45°N, local apparent solar time). Visual magnitude -0.2. The disk is 93.3% illuminated (gibbous). It is 123.2° from the Sun, on its west side. Motion is direct at 0.080° per day in ecliptic longitude at the snapshot. Position reference: Regulus, 10.4° away. Station Jan 10 12:59 UTC: turns retrograde. Mars: 10.4° 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 10.2° above the horizon. Rises 19:57; sets 09:58 (45°N, local apparent solar time). Visual magnitude -2.4. The disk is 99.6% illuminated (nearly full). It is 137.1° from the Sun, on its west side. Motion is retrograde at 0.070° per day in ecliptic longitude at the snapshot. Position reference: Regulus, 4.0° away. Jupiter: 4.0° from Regulus 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 27.3° above the horizon. Rises 11:30; sets 23:44 (45°N, local apparent solar time). Visual magnitude 0.7. The disk is 99.7% illuminated (nearly full). It is 85.1° from the Sun, on its east side. Motion is direct at 0.043° per day in ecliptic longitude at the snapshot. Position reference: Diphda, 19.1° away. Saturn: 19.1° from Diphda 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 65.4° above the horizon. Rises 13:32; sets 04:34 (45°N, local apparent solar time). Visual magnitude 5.6. The disk is 100.0% illuminated (nearly full). It is 138.8° from the Sun, on its east side. Motion is retrograde at 0.029° per day in ecliptic longitude at the snapshot. Position reference: Aldebaran, 9.6° away. Uranus: 9.6° 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 21.9° above the horizon. Rises 11:10; sets 23:11 (45°N, local apparent solar time). Visual magnitude 7.8. The disk is 100.0% illuminated (nearly full). It is 78.4° from the Sun, on its east side. Motion is direct at 0.013° per day in ecliptic longitude at the snapshot. Position reference: Fumalsamakah, 16.5° away. Neptune: 16.5° from Fumalsamakah in the Pathfinder.
Ceres
Ceres: binoculars at the Monday 00:00 UTC snapshot. At 45°N and 21:00 local apparent solar time, it is 47.3° above the horizon. Rises 16:02; sets 08:48 (45°N, local apparent solar time). Visual magnitude 6.8. The disk is 99.9% illuminated (nearly full). It is 171.2° from the Sun, on its west side. Motion is retrograde at 0.235° per day in ecliptic longitude at the snapshot. Position reference: Castor, 3.7° away. Opposition in ecliptic longitude Jan 07 18:06 UTC. Ceres: 3.7° from Castor 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 31.3° below the horizon. Rises 09:12; sets 17:55 (45°N, local apparent solar time). Visual magnitude 14.6. The disk is 100.0% illuminated (nearly full). It is 21.5° from the Sun, on its east side. Motion is direct at 0.030° per day in ecliptic longitude at the snapshot. Position reference: Dabih, 8.8° away. Conjunction with Moon in ecliptic longitude Jan 09 07:30 UTC. Pluto: 8.8° from Dabih in the Pathfinder.
Highlights
Mercury
In solar glare; magnitude -1.3; direct motion; 99.8% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Jan 08 05:10 UTC. Mercury: 2.5° from Nunki in the Pathfinder.
Venus
Naked eye; magnitude -4.5; direct motion; 50.3% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Venus: 7.4° from Acrab in the Pathfinder.
Moon
Naked eye; magnitude -7.6; direct motion; 13.0% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Solar conjunction in ecliptic longitude Jan 07 20:24 UTC. Conjunction with Mercury in ecliptic longitude Jan 08 05:10 UTC. Conjunction with Pluto in ecliptic longitude Jan 09 07:30 UTC. Moon: 3.4° from Dschubba in the Pathfinder.
Mars
Naked eye; magnitude -0.2; direct motion; 93.3% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Station Jan 10 12:59 UTC: turns retrograde. Mars: 10.4° from Regulus in the Pathfinder.
Jupiter
Naked eye; magnitude -2.4; retrograde motion; 99.6% illuminated. Monday 00:00 UTC snapshot. Jupiter: 4.0° from Regulus in the Pathfinder.
Saturn
Naked eye; magnitude 0.7; direct motion; 99.7% illuminated. Monday 00:00 UTC snapshot. Saturn: 19.1° from Diphda in the Pathfinder.
Uranus
Binoculars; magnitude 5.6; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Uranus: 9.6° from Aldebaran in the Pathfinder.
Neptune
Telescope; magnitude 7.8; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Neptune: 16.5° from Fumalsamakah in the Pathfinder.
Ceres
Binoculars; magnitude 6.8; retrograde motion; 99.9% illuminated. Monday 00:00 UTC snapshot. Opposition in ecliptic longitude Jan 07 18:06 UTC. Ceres: 3.7° from Castor 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. Conjunction with Moon in ecliptic longitude Jan 09 07:30 UTC. Pluto: 8.8° from Dabih in the Pathfinder.