ISO 2027-W02
Week begins: Monday, January 11, 2027
Calendar
| Date | Zodiac day | Events |
|---|---|---|
| Mon, Jan 11, 2027 | ♑ 22 | C41 / Hyades · Hyades —  1 1.0 — Tropical Winter |
| Tue, Jan 12, 2027 | ♑ 23 | α Dor —  3 3.3 — Southern Winter |
| Wed, Jan 13, 2027 | ♑ 24 | Aldebaran (α Tau) — Var 1 0.9 0.8–1.0 — Tropical Winter |
| Thu, Jan 14, 2027 | ♑ 25 | α Cae —  4 4.4 — Southern Winterβ Cae — 5 5.0 — Southern Winter |
| Fri, Jan 15, 2027 | ♑ 26 | 🌓 First Quarter — 20:34:30 UTC |
| Sat, Jan 16, 2027 | ♑ 27 | |
| Sun, Jan 17, 2027 | ♑ 28 | α Cam — 4 4.3 — Northern Winter |
Weekly Solar-System Ephemeris
Snapshot: Week begins January 11, 2027, 00:00 UTC.
(-90° to +90°; defaults +45°, 21:00 LAT)
| Body | ☉︎ | ☽︎ | ☿︎ | ♀︎ | ♂︎ | ♃︎ | ♄︎ |
|---|---|---|---|---|---|---|---|
| Ecliptic | ♑︎ 20°31′ β +0°00′ | ♒︎ 24°42′ β +0°22′ | ♑︎ 26°14′ β −2°07′ | ♐︎ 3°49′ β +3°18′ | ♍︎ 10°26′ β +3°37′ | ♌︎ 25°41′ β +0°58′ | ♈︎ 8°48′ β −2°25′ |
| Observing |  | -7.1 | ☉︎ | -4.5 | -0.4 | -2.5 | 0.8 |
| Rise | 07:29 | 09:09 | 08:03 | 03:52 | 20:36 | 19:23 | 11:00 |
| Set | 16:31 | 19:29 | 16:49 | 13:31 | 10:14 | 09:26 | 23:15 |
Extended targets:
| Body | ⚳︎ | ♅︎ | ♆︎ | ♇︎ |
|---|---|---|---|---|
| Ecliptic | ♋︎ 16°26′ β +7°52′ | ♊︎ 2°02′ β −0°08′ | ♈︎ 1°51′ β −1°22′ | ♒︎ 4°39′ β −4°16′ |
| Observing | 6.8 | 5.6 | 7.8 | ☉︎ |
| Rise | 15:19 | 13:00 | 10:40 | 08:42 |
| Set | 08:14 | 04:02 | 22:41 | 17:25 |
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 05:10:35 UTC
ISO 2027-W02 runs from January 11 through January 17. Venus is about 1.2° in ecliptic longitude from Dschubba in Scorpius. To find Jupiter, first identify Leo, trace the Sickle, and locate Regulus in that pattern. Jupiter lies about 4.1° away in ecliptic longitude at the Monday 00:00 UTC snapshot; use the finder to transfer from Regulus to the planet.
Naked eye: 🌓 First Quarter — 20:34:30 UTC. Moderate moonlight makes timing and local sky position important for faint targets. Use α Dor, Aldebaran as the week’s fixed-sky framework.
Planets: Moon: Naked eye; magnitude -7.1; direct motion; 8.7% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Conjunction with Saturn in ecliptic longitude Jan 14 14:15 UTC. Conjunction with Neptune in ecliptic longitude Jan 14 00:51 UTC. Mercury: In solar glare; magnitude -1.1; direct motion; 98.5% illuminated. Monday 00:00 UTC snapshot. Conjunction with Pluto in ecliptic longitude Jan 16 02:48 UTC. Venus: Naked eye; magnitude -4.5; direct motion; 53.9% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Mars: Naked eye; magnitude -0.4; retrograde motion; 94.5% illuminated. Monday 00:00 UTC snapshot. Ceres: Binoculars; magnitude 6.8; retrograde motion; 99.9% illuminated. Monday 00:00 UTC snapshot. Jupiter: Naked eye; magnitude -2.5; retrograde motion; 99.7% illuminated. Monday 00:00 UTC snapshot. Saturn: Naked eye; magnitude 0.8; direct motion; 99.7% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Jan 14 14:15 UTC. 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. Conjunction with Moon in ecliptic longitude Jan 14 00:51 UTC. Pluto: In solar glare; magnitude 14.6; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Conjunction with Mercury in ecliptic longitude Jan 16 02:48 UTC.
Binoculars: Trace Caelum’s charted figure in the finder, then identify α Cae at its charted position. Trace Caelum’s charted figure in the finder, then identify β Cae at its charted position. Trace Camelopardalis’s charted figure in the finder, then identify α Cam at its charted position.
Small telescope: Hyades: 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 08:03; sets 16:49 (45°N, local apparent solar time). Visual magnitude -1.1. The disk is 98.5% illuminated (gibbous). It is 6.1° from the Sun, on its east side. Motion is direct at 1.664° per day in ecliptic longitude at the snapshot. Position reference: Dabih, 10.6° away. Conjunction with Pluto in ecliptic longitude Jan 16 02:48 UTC. Mercury: 10.6° from Dabih 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 62.3° below the horizon. Rises 03:52; sets 13:31 (45°N, local apparent solar time). Visual magnitude -4.5. The disk is 53.9% illuminated (gibbous). It is 46.8° from the Sun, on its west side. Motion is direct at 1.062° per day in ecliptic longitude at the snapshot. Position reference: Acrab, 2.3° away. Venus: 2.3° 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 16.4° below the horizon. Rises 09:09; sets 19:29 (45°N, local apparent solar time). Visual magnitude -7.1. The disk is 8.7% illuminated (waxing crescent). It is 34.2° from the Sun, on its east side. Motion is direct at 11.989° per day in ecliptic longitude at the snapshot. Position reference: Sadalsuud, 8.3° away. Conjunction with Saturn in ecliptic longitude Jan 14 14:15 UTC. Conjunction with Neptune in ecliptic longitude Jan 14 00:51 UTC. Moon: 8.3° from Sadalsuud 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 3.6° above the horizon. Rises 20:36; sets 10:14 (45°N, local apparent solar time). Visual magnitude -0.4. The disk is 94.5% illuminated (gibbous). It is 130.0° from the Sun, on its west side. Motion is retrograde at 0.006° per day in ecliptic longitude at the snapshot. Position reference: Regulus, 10.7° away. Mars: 10.7° 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 16.1° above the horizon. Rises 19:23; sets 09:26 (45°N, local apparent solar time). Visual magnitude -2.5. The disk is 99.7% illuminated (nearly full). It is 144.8° from the Sun, on its west side. Motion is retrograde at 0.089° per day in ecliptic longitude at the snapshot. Position reference: Regulus, 4.5° away. Jupiter: 4.5° 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 22.8° above the horizon. Rises 11:00; sets 23:15 (45°N, local apparent solar time). Visual magnitude 0.8. The disk is 99.7% illuminated (nearly full). It is 78.3° from the Sun, on its east side. Motion is direct at 0.055° per day in ecliptic longitude at the snapshot. Position reference: Diphda, 19.2° away. Conjunction with Moon in ecliptic longitude Jan 14 14:15 UTC. Saturn: 19.2° 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 64.6° above the horizon. Rises 13:00; sets 04:02 (45°N, local apparent solar time). Visual magnitude 5.6. The disk is 100.0% illuminated (nearly full). It is 131.5° from the Sun, on its east side. Motion is retrograde at 0.024° per day in ecliptic longitude at the snapshot. Position reference: Aldebaran, 9.7° away. Uranus: 9.7° 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 17.0° above the horizon. Rises 10:40; sets 22:41 (45°N, local apparent solar time). Visual magnitude 7.8. The disk is 100.0% illuminated (nearly full). It is 71.3° from the Sun, on its east side. Motion is direct at 0.017° per day in ecliptic longitude at the snapshot. Position reference: Fumalsamakah, 16.5° away. Conjunction with Moon in ecliptic longitude Jan 14 00:51 UTC. 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 54.3° above the horizon. Rises 15:19; sets 08:14 (45°N, local apparent solar time). Visual magnitude 6.8. The disk is 99.9% illuminated (nearly full). It is 171.1° from the Sun, on its east side. Motion is retrograde at 0.237° per day in ecliptic longitude at the snapshot. Position reference: Castor, 4.7° away. Ceres: 4.7° from Castor in the Pathfinder.
Pluto
Pluto: in solar glare at the Monday 00:00 UTC snapshot. Rises 08:42; sets 17:25 (45°N, local apparent solar time). Visual magnitude 14.6. The disk is 100.0% illuminated (nearly full). It is 14.8° from the Sun, on its east side. Motion is direct at 0.031° per day in ecliptic longitude at the snapshot. Position reference: Dabih, 8.9° away. Conjunction with Mercury in ecliptic longitude Jan 16 02:48 UTC. Pluto: 8.9° from Dabih in the Pathfinder.
Highlights
Mercury
In solar glare; magnitude -1.1; direct motion; 98.5% illuminated. Monday 00:00 UTC snapshot. Conjunction with Pluto in ecliptic longitude Jan 16 02:48 UTC. Mercury: 10.6° from Dabih in the Pathfinder.
Venus
Naked eye; magnitude -4.5; direct motion; 53.9% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Venus: 2.3° from Acrab in the Pathfinder.
Moon
Naked eye; magnitude -7.1; direct motion; 8.7% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Conjunction with Saturn in ecliptic longitude Jan 14 14:15 UTC. Conjunction with Neptune in ecliptic longitude Jan 14 00:51 UTC. Moon: 8.3° from Sadalsuud in the Pathfinder.
Mars
Naked eye; magnitude -0.4; retrograde motion; 94.5% illuminated. Monday 00:00 UTC snapshot. Mars: 10.7° from Regulus in the Pathfinder.
Jupiter
Naked eye; magnitude -2.5; retrograde motion; 99.7% illuminated. Monday 00:00 UTC snapshot. Jupiter: 4.5° from Regulus in the Pathfinder.
Saturn
Naked eye; magnitude 0.8; direct motion; 99.7% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Jan 14 14:15 UTC. Saturn: 19.2° from Diphda in the Pathfinder.
Uranus
Binoculars; magnitude 5.6; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Uranus: 9.7° from Aldebaran in the Pathfinder.
Neptune
Telescope; magnitude 7.8; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Jan 14 00:51 UTC. Neptune: 16.5° from Fumalsamakah in the Pathfinder.
Ceres
Binoculars; magnitude 6.8; retrograde motion; 99.9% illuminated. Monday 00:00 UTC snapshot. Ceres: 4.7° from Castor in the Pathfinder.
Pluto
In solar glare; magnitude 14.6; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Conjunction with Mercury in ecliptic longitude Jan 16 02:48 UTC. Pluto: 8.9° from Dabih in the Pathfinder.