ISO 2026-W22
Week begins: Monday, May 25, 2026
Calendar
| Date | Zodiac day | Events |
|---|---|---|
| Mon, May 25, 2026 | ♊ 5 | C83 / NGC 4945 —  10 9.5 — Southern Spring |
| Tue, May 26, 2026 | ♊ 6 | α Com —  5 5.2 — Tropical SpringC29 / NGC 5005 / Finest NGC 66 / NGC 5005 · MCG 6-29-52 — 10 9.8 — Northern Springβ Com — 4 4.2 — Northern Spring — in the Milky WayM53 — 8 7.6 — Tropical Spring |
| Wed, May 27, 2026 | ♊ 7 | Finest NGC 67 / NGC 5033 · MCG 6-29-62 — 11 10.7 — Northern SpringM63 — 9 8.6 — Northern Spring |
| Thu, May 28, 2026 | ♊ 8 | |
| Fri, May 29, 2026 | ♊ 9 | Mizar (ζ UMa) —  2 2.2 — Northern SpringSpica (α Vir) — Var 1 1.0 1.0–1.1 — Tropical SpringC77 / NGC 5128 · Centaurus A — 7 7.0 — Southern Spring |
| Sat, May 30, 2026 | ♊ 10 | C80 / NGC 5139 · Omega Centauri — 4 3.6 — Southern Spring |
| Sun, May 31, 2026 | ♊ 11 | 🌕 Full Moon · Flower Moon — 08:45:13 UTC M51 — 8 8.4 — Northern Spring |
Weekly Solar-System Ephemeris
Snapshot: Week begins May 25, 2026, 00:00 UTC.
(-90° to +90°; defaults +45°, 21:00 LAT)
| Body | ☉︎ | ☽︎ | ☿︎ | ♀︎ | ♂︎ | ♃︎ | ♄︎ |
|---|---|---|---|---|---|---|---|
| Ecliptic | ♊︎ 3°49′ β −0°00′ | ♍︎ 22°18′ β −1°32′ | ♊︎ 16°02′ β +1°43′ | ♋︎ 7°06′ β +1°46′ | ♉︎ 4°33′ β −0°42′ | ♋︎ 22°47′ β +0°24′ | ♈︎ 11°38′ β −2°14′ |
| Observing |  | -10.7 | ☉︎ | -3.9 | 1.3 | -1.9 | 0.9 |
| Rise | 04:25 | 13:12 | 05:00 | 06:29 | 03:09 | 07:52 | 02:26 |
| Set | 19:35 | 01:33 | 20:43 | 22:19 | 16:57 | 23:10 | 14:52 |
Extended targets:
| Body | ⚳︎ | ♅︎ | ♆︎ | ♇︎ |
|---|---|---|---|---|
| Ecliptic | ♉︎ 28°22′ β −3°13′ | ♊︎ 1°39′ β −0°10′ | ♈︎ 3°55′ β −1°20′ | ♒︎ 5°26′ β −4°07′ |
| Observing | ☉︎ | ☉︎ | 7.8 | 14.5 |
| Rise | 04:27 | 04:21 | 02:05 | 00:05 |
| Set | 18:53 | 19:21 | 14:13 | 08:52 |
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 2026-10-12 05:59:44 UTC
ISO 2026-W22 runs from May 25 through May 31. Ceres and Uranus are separated by about 3.3° in geocentric ecliptic longitude at the Monday 00:00 UTC snapshot.
Naked eye: 🌕 Full Moon · Flower Moon — 08:45:13 UTC. Bright moonlight favors prominent stars and planets while reducing contrast on faint deep-sky objects. Use Mizar, Spica as the week’s fixed-sky framework.
Planets: Moon: Naked eye; magnitude -10.7; direct motion; 66.0% illuminated. Monday 00:00 UTC snapshot. Opposition in ecliptic longitude May 31 08:45 UTC. Mercury: In solar glare; magnitude -1.2; direct motion; 86.9% illuminated. Monday 00:00 UTC snapshot. Venus: Naked eye; magnitude -3.9; direct motion; 81.7% illuminated. Monday 00:00 UTC snapshot. Mars: Naked eye; magnitude 1.3; direct motion; 96.8% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Ceres: In solar glare; magnitude 8.7; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Jupiter: Naked eye; magnitude -1.9; direct motion; 99.5% illuminated. Monday 00:00 UTC snapshot. Saturn: Naked eye; magnitude 0.9; direct motion; 99.8% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Uranus: In solar glare; magnitude 5.8; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Neptune: Telescope; magnitude 7.8; direct motion; 100.0% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Pluto: Substantial telescope; magnitude 14.5; retrograde motion; 100.0% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot.
Binoculars: Trace the charted figure of Com, then identify Diadem at its plotted position. Trace the charted figure of Com, then identify β Com at its plotted position.
Small telescope: NGC 4945: consult its dedicated finder and observing story for equipment guidance; MCG 6-29-52: consult its dedicated finder and observing story for equipment guidance; M53: consult its dedicated finder and observing story for equipment guidance; MCG 6-29-62: consult its dedicated finder and observing story for equipment guidance; Sunflower Galaxy: consult its dedicated finder and observing story for equipment guidance; Centaurus A: consult its dedicated finder and observing story for equipment guidance; Omega Centauri: consult its dedicated finder and observing story for equipment guidance; Whirlpool Galaxy: 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 05:00; sets 20:43 (45°N, local apparent solar time). Visual magnitude -1.2. The disk is 86.9% illuminated (gibbous). It is 12.3° from the Sun, on its east side. Motion is direct at 2.017° per day in ecliptic longitude at the snapshot. Position reference: Elnath, 7.8° away. Mercury: 7.8° from Elnath 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 11.5° above the horizon. Rises 06:29; sets 22:19 (45°N, local apparent solar time). Visual magnitude -3.9. The disk is 81.7% illuminated (gibbous). It is 33.3° from the Sun, on its east side. Motion is direct at 1.189° per day in ecliptic longitude at the snapshot. Position reference: Alhena, 8.8° away. Venus: 8.8° from Alhena 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 41.7° above the horizon. Rises 13:12; sets 01:33 (45°N, local apparent solar time). Visual magnitude -10.7. The disk is 66.0% illuminated (waxing gibbous). It is 108.5° from the Sun, on its east side. Motion is direct at 12.762° per day in ecliptic longitude at the snapshot. Position reference: Zavijava, 5.7° away. Opposition in ecliptic longitude May 31 08:45 UTC. Moon: 5.7° from Zavijava 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 31.0° below the horizon. Rises 03:09; sets 16:57 (45°N, local apparent solar time). Visual magnitude 1.3. The disk is 96.8% illuminated (gibbous). It is 29.3° from the Sun, on its west side. Motion is direct at 0.747° per day in ecliptic longitude at the snapshot. Position reference: Sheratan, 9.2° away. Mars: 9.2° from Sheratan 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 20.7° above the horizon. Rises 07:52; sets 23:10 (45°N, local apparent solar time). Visual magnitude -1.9. The disk is 99.5% illuminated (nearly full). It is 49.0° from the Sun, on its east side. Motion is direct at 0.180° per day in ecliptic longitude at the snapshot. Position reference: Pollux, 6.3° away. Jupiter: 6.3° 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 42.4° below the horizon. Rises 02:26; sets 14:52 (45°N, local apparent solar time). Visual magnitude 0.9. The disk is 99.8% illuminated (nearly full). It is 52.2° from the Sun, on its west side. Motion is direct at 0.092° per day in ecliptic longitude at the snapshot. Position reference: Alrescha, 19.3° away. Saturn: 19.3° from Alrescha in the Pathfinder.
Uranus
Uranus: in solar glare at the Monday 00:00 UTC snapshot. Rises 04:21; sets 19:21 (45°N, local apparent solar time). Visual magnitude 5.8. The disk is 100.0% illuminated (nearly full). It is 2.2° from the Sun, on its west side. Motion is direct at 0.058° per day in ecliptic longitude at the snapshot. Position reference: Aldebaran, 10.0° away. Ceres is 4.5° away at the snapshot. 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 43.4° below the horizon. Rises 02:05; sets 14:13 (45°N, local apparent solar time). Visual magnitude 7.8. The disk is 100.0% illuminated (nearly full). It is 59.9° from the Sun, on its west side. Motion is direct at 0.022° per day in ecliptic longitude at the snapshot. Position reference: Fumalsamakah, 18.2° away. Neptune: 18.2° from Fumalsamakah in the Pathfinder.
Ceres
Ceres: in solar glare at the Monday 00:00 UTC snapshot. Rises 04:27; sets 18:53 (45°N, local apparent solar time). Visual magnitude 8.7. The disk is 100.0% illuminated (nearly full). It is 6.3° from the Sun, on its west side. Motion is direct at 0.410° per day in ecliptic longitude at the snapshot. Position reference: Aldebaran, 12.0° away. Uranus is 4.5° away at the snapshot. Ceres: 12.0° from Aldebaran 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 31.4° below the horizon. Rises 00:05; sets 08:52 (45°N, local apparent solar time). Visual magnitude 14.5. The disk is 100.0% illuminated (nearly full). It is 118.3° from the Sun, on its west side. Motion is retrograde at 0.008° per day in ecliptic longitude at the snapshot. Position reference: Dabih, 8.8° away. Pluto: 8.8° from Dabih in the Pathfinder.
Highlights
Mercury
In solar glare; magnitude -1.2; direct motion; 86.9% illuminated. Monday 00:00 UTC snapshot. Mercury: 7.8° from Elnath in the Pathfinder.
Venus
Naked eye; magnitude -3.9; direct motion; 81.7% illuminated. Monday 00:00 UTC snapshot. Venus: 8.8° from Alhena in the Pathfinder.
Moon
Naked eye; magnitude -10.7; direct motion; 66.0% illuminated. Monday 00:00 UTC snapshot. Opposition in ecliptic longitude May 31 08:45 UTC. Moon: 5.7° from Zavijava in the Pathfinder.
Mars
Naked eye; magnitude 1.3; direct motion; 96.8% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Mars: 9.2° from Sheratan in the Pathfinder.
Jupiter
Naked eye; magnitude -1.9; direct motion; 99.5% illuminated. Monday 00:00 UTC snapshot. Jupiter: 6.3° from Pollux in the Pathfinder.
Saturn
Naked eye; magnitude 0.9; direct motion; 99.8% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Saturn: 19.3° from Alrescha in the Pathfinder.
Uranus
In solar glare; magnitude 5.8; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Uranus: 10.0° from Aldebaran in the Pathfinder.
Neptune
Telescope; magnitude 7.8; direct motion; 100.0% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Neptune: 18.2° from Fumalsamakah in the Pathfinder.
Ceres
In solar glare; magnitude 8.7; direct motion; 100.0% illuminated. Monday 00:00 UTC snapshot. Ceres: 12.0° from Aldebaran in the Pathfinder.
Pluto
Substantial telescope; magnitude 14.5; retrograde motion; 100.0% illuminated. Below the horizon at 21:00 local apparent solar time, 45°N. Monday 00:00 UTC snapshot. Pluto: 8.8° from Dabih in the Pathfinder.