Full Breakdown
Dawn Duo: Waning Crescent Moon Near Jupiter (and Mars) in Early September 2026
9/8/2026, 11:27:25 PM
Core Sky Event
In early September 2026 a thin waning crescent Moon will pass within a degree of Jupiter. The closest approach occurs on September 8, when the Moon in Cancer is less than one degree north of Jupiter. An hour later the Moon moves to the opposite side, offering a second viewing window on the morning of September 9 as the pair continues eastward.
Observational Details
- Timing: In the United Kingdom the Moon rises around 5 a.m. on Tuesday, with Jupiter about 45 minutes later. In the United States the conjunction occurs at 2 p.m. EDT, while the pair is visible before sunrise.
- Separation: The Moon will pass 0.8° north of Jupiter at closest approach.
- Illumination: The Moon is about 5 %–10 % illuminated, appearing as a thin crescent.
- Altitude: An hour before sunrise on September 9 the Moon sits about 4° above the eastern horizon, with Jupiter slightly higher.
- Companions: Mars in Gemini will be visible to the west, and the Beehive Cluster (M 36) lies about 3.8° west of the Moon on September 8.
Celestial Context
All three bodies lie along the ecliptic, the apparent path of the Sun and planets. By the morning of September 9 the Moon will have moved from Cancer into Leo, approaching Regulus, the “heart of the Lion.”
Viewing Tips for Amateur Astronomers
- Location: Choose a site with an unobstructed eastern horizon and minimal light pollution.
- Equipment: The crescent is visible to the naked eye; binoculars or a small telescope will reveal Jupiter’s cloud bands and its four Galilean moons.
- Timing: In the UK, look eastward at 5 a.m. on September 8; in the US, aim for the pre-sunrise period on September 9. The Moon will be about 20° high an hour before sunrise on September 8.
- Additional Targets: While waiting, scan slightly westward to spot the Beehive Cluster, whose brighter stars are naked-eye visible under dark conditions.
Data & Statistics
| Parameter | Value | Source |
|---|---|---|
| Moon phase | Waning crescent (?5 %–10 % illumination) | The Guardian; Astronomy.com |
| Closest separation | 0.8° north of Jupiter | Astronomy.com |
| Moonrise (U.S. reference) | 3:30 a.m. local daylight time | Astronomy.com |
| Jupiter rise (U.S.) | ~4:15 a.m. | Jerseysbest |
| Mars position | Gemini, west of Moon-Jupiter line | The Guardian |
| Beehive Cluster offset | 3.8° west of Moon | Astronomy.com |
| Regulus altitude (Sept 9) | ~4° above eastern horizon | Astronomy.com |
Why It Matters for Skywatchers
The September 8–9 alignment offers a low-light chance to view a planetary conjunction without the Moon’s glare. The proximity of Moon, Jupiter and Mars along the ecliptic provides a clear illustration of the planetary plane, while the Beehive Cluster adds depth for star-hopping practice.
*All times and positions are based on the observations and calculations published by the cited outlets.*
