ISO 2027-W05
Week begins: Monday, February 1, 2027
Calendar
| Date | Zodiac day | Events |
|---|---|---|
| Mon, Feb 1, 2027 | ♒ 13 | |
| Tue, Feb 2, 2027 | ♒ 14 | Menkalinan (β Aur) —  Var 2 1.9 1.9–2.0 — Northern Winter |
| Wed, Feb 3, 2027 | ♒ 15 | |
| Thu, Feb 4, 2027 | ♒ 16 | Imbolc · Winter–Spring midpoint — 01:46:18 UTC M35 —  5 5.3 — Northern Winterα Men —  5 5.1 — Antarctic Winter |
| Fri, Feb 5, 2027 | ♒ 17 | Finest NGC 29 / NGC 2194 · Collinder 87 — 10 10.0 — Tropical Winter |
| Sat, Feb 6, 2027 | ♒ 18 | 🌑 New Moon — 15:56:07 UTC |
| Sun, Feb 7, 2027 | ♒ 19 | Mirzam (β CMa) — 2 2.0 — Tropical Winter |
Weekly Solar-System Ephemeris
Snapshot: Week begins February 1, 2027, 00:00 UTC.
(-90° to +90°; defaults +45°, 21:00 LAT)
| Body | ☉︎ | ☽︎ | ☿︎ | ♀︎ | ♂︎ | ♃︎ | ♄︎ |
|---|---|---|---|---|---|---|---|
| Ecliptic | ♒︎ 11°53′ β −0°00′ | ♐︎ 10°25′ β −4°58′ | ♒︎ 29°56′ β −0°09′ | ♐︎ 27°01′ β +2°30′ | ♍︎ 7°25′ β +4°17′ | ♌︎ 23°21′ β +1°02′ | ♈︎ 10°16′ β −2°20′ |
| Observing |  | -8.8 | ☉︎ | -4.3 | -0.9 | -2.5 | 0.8 |
| Rise | 07:08 | 03:32 | 07:56 | 04:16 | 18:49 | 17:42 | 09:34 |
| Set | 16:52 | 11:37 | 18:26 | 13:24 | 08:42 | 07:52 | 21:54 |
Extended targets:
| Body | ⚳︎ | ♅︎ | ♆︎ | ♇︎ |
|---|---|---|---|---|
| Ecliptic | ♋︎ 12°05′ β +8°46′ | ♊︎ 1°42′ β −0°08′ | ♈︎ 2°19′ β −1°22′ | ♒︎ 5°19′ β −4°17′ |
| Observing | 7.3 | 5.7 | 7.8 | ☉︎ |
| Rise | 13:22 | 11:31 | 09:12 | 07:15 |
| Set | 06:36 | 02:32 | 21:15 | 16:00 |
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 06:15:03 UTC
ISO 2027-W05 runs from February 1 through February 7.
Naked eye: 🌑 New Moon — 15:56:07 UTC. The dark Moon favors faint targets and extended star fields. Use Menkalinan, Mirzam as the week’s fixed-sky framework.
Planets: Moon: Naked eye; magnitude -8.8; direct motion; 26.3% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Solar conjunction in ecliptic longitude Feb 06 15:56 UTC. Conjunction with Venus in ecliptic longitude Feb 02 13:05 UTC. Conjunction with Pluto in ecliptic longitude Feb 05 15:30 UTC. Mercury: In solar glare; magnitude -0.7; direct motion; 63.1% illuminated. Monday 00:00 UTC snapshot. Venus: Naked eye; magnitude -4.3; direct motion; 63.1% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Feb 02 13:05 UTC. Mars: Naked eye; magnitude -0.9; retrograde motion; 98.3% illuminated. Monday 00:00 UTC snapshot. Ceres: Binoculars; magnitude 7.3; retrograde motion; 99.0% illuminated. Monday 00:00 UTC snapshot. Jupiter: Naked eye; magnitude -2.5; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Saturn: Naked eye; magnitude 0.8; direct motion; 99.8% illuminated. Monday 00:00 UTC snapshot. Uranus: Binoculars; magnitude 5.7; retrograde motion; 99.9% illuminated. Monday 00:00 UTC snapshot. Neptune: Telescope; magnitude 7.8; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Pluto: In solar glare; magnitude 14.6; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Feb 05 15:30 UTC.
Binoculars: Trace Mensa’s charted figure in the finder, then identify α Men at its charted position.
Small telescope: M35: consult its dedicated finder and observing story for equipment guidance; Collinder 87: 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 07:56; sets 18:26 (45°N, local apparent solar time). Visual magnitude -0.7. The disk is 63.1% illuminated (gibbous). It is 18.0° from the Sun, on its east side. Motion is direct at 1.244° per day in ecliptic longitude at the snapshot. Position reference: Sadalsuud, 10.7° away. Mercury: 10.7° from Sadalsuud 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 65.8° below the horizon. Rises 04:16; sets 13:24 (45°N, local apparent solar time). Visual magnitude -4.3. The disk is 63.1% illuminated (gibbous). It is 44.9° from the Sun, on its west side. Motion is direct at 1.140° per day in ecliptic longitude at the snapshot. Position reference: Sabik, 9.8° away. Conjunction with Moon in ecliptic longitude Feb 02 13:05 UTC. Venus: 9.8° from Sabik 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 65.1° below the horizon. Rises 03:32; sets 11:37 (45°N, local apparent solar time). Visual magnitude -8.8. The disk is 26.3% illuminated (waning crescent). It is 61.6° from the Sun, on its west side. Motion is direct at 11.970° per day in ecliptic longitude at the snapshot. Position reference: Antares, 0.5° away. Solar conjunction in ecliptic longitude Feb 06 15:56 UTC. Conjunction with Venus in ecliptic longitude Feb 02 13:05 UTC. Conjunction with Pluto in ecliptic longitude Feb 05 15:30 UTC. Moon: 0.5° from Antares 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 22.2° above the horizon. Rises 18:49; sets 08:42 (45°N, local apparent solar time). Visual magnitude -0.9. The disk is 98.3% illuminated (gibbous). It is 154.1° from the Sun, on its west side. Motion is retrograde at 0.278° per day in ecliptic longitude at the snapshot. Position reference: Regulus, 8.1° away. Mars: 8.1° 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 33.8° above the horizon. Rises 17:42; sets 07:52 (45°N, local apparent solar time). Visual magnitude -2.5. The disk is 100.0% illuminated (nearly full). It is 168.5° from the Sun, on its west side. Motion is retrograde at 0.128° per day in ecliptic longitude at the snapshot. Position reference: Regulus, 6.9° away. Jupiter: 6.9° 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 9.0° above the horizon. Rises 09:34; sets 21:54 (45°N, local apparent solar time). Visual magnitude 0.8. The disk is 99.8% illuminated (nearly full). It is 58.4° from the Sun, on its east side. Motion is direct at 0.085° per day in ecliptic longitude at the snapshot. Position reference: Diphda, 19.8° away. Saturn: 19.8° 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 55.2° above the horizon. Rises 11:31; sets 02:32 (45°N, local apparent solar time). Visual magnitude 5.7. The disk is 99.9% illuminated (nearly full). It is 109.8° from the Sun, on its east side. Motion is retrograde at 0.007° per day in ecliptic longitude at the snapshot. Position reference: Aldebaran, 10.0° away. Uranus: 10.0° 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 2.0° above the horizon. Rises 09:12; sets 21:15 (45°N, local apparent solar time). Visual magnitude 7.8. The disk is 100.0% illuminated (nearly full). It is 50.4° from the Sun, on its east side. Motion is direct at 0.027° per day in ecliptic longitude at the snapshot. Position reference: Fumalsamakah, 16.9° away. Neptune: 16.9° 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 72.4° above the horizon. Rises 13:22; sets 06:36 (45°N, local apparent solar time). Visual magnitude 7.3. The disk is 99.0% illuminated (nearly full). It is 149.1° from the Sun, on its east side. Motion is retrograde at 0.160° per day in ecliptic longitude at the snapshot. Position reference: Castor, 8.5° away. Ceres: 8.5° from Castor in the Pathfinder.
Pluto
Pluto: in solar glare at the Monday 00:00 UTC snapshot. Rises 07:15; sets 16:00 (45°N, local apparent solar time). Visual magnitude 14.6. The disk is 100.0% illuminated (nearly full). It is 7.8° from the Sun, on its west side. Motion is direct at 0.032° per day in ecliptic longitude at the snapshot. Position reference: Dabih, 8.9° away. Conjunction with Moon in ecliptic longitude Feb 05 15:30 UTC. Pluto: 8.9° from Dabih in the Pathfinder.
Highlights
Mercury
In solar glare; magnitude -0.7; direct motion; 63.1% illuminated. Monday 00:00 UTC snapshot. Mercury: 10.7° from Sadalsuud in the Pathfinder.
Venus
Naked eye; magnitude -4.3; direct motion; 63.1% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Feb 02 13:05 UTC. Venus: 9.8° from Sabik in the Pathfinder.
Moon
Naked eye; magnitude -8.8; direct motion; 26.3% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Solar conjunction in ecliptic longitude Feb 06 15:56 UTC. Conjunction with Venus in ecliptic longitude Feb 02 13:05 UTC. Conjunction with Pluto in ecliptic longitude Feb 05 15:30 UTC. Moon: 0.5° from Antares in the Pathfinder.
Mars
Naked eye; magnitude -0.9; retrograde motion; 98.3% illuminated. Monday 00:00 UTC snapshot. Mars: 8.1° from Regulus in the Pathfinder.
Jupiter
Naked eye; magnitude -2.5; retrograde motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Jupiter: 6.9° from Regulus in the Pathfinder.
Saturn
Naked eye; magnitude 0.8; direct motion; 99.8% illuminated. Monday 00:00 UTC snapshot. Saturn: 19.8° from Diphda in the Pathfinder.
Uranus
Binoculars; magnitude 5.7; retrograde motion; 99.9% illuminated. Monday 00:00 UTC snapshot. Uranus: 10.0° from Aldebaran in the Pathfinder.
Neptune
Telescope; magnitude 7.8; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Neptune: 16.9° from Fumalsamakah in the Pathfinder.
Ceres
Binoculars; magnitude 7.3; retrograde motion; 99.0% illuminated. Monday 00:00 UTC snapshot. Ceres: 8.5° from Castor in the Pathfinder.
Pluto
In solar glare; magnitude 14.6; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Conjunction with Moon in ecliptic longitude Feb 05 15:30 UTC. Pluto: 8.9° from Dabih in the Pathfinder.