Map of the Universe

Aquarius IV

Dwarf galaxy · Dwarf galaxy in constellation Aquarius

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Aquarius IV
Picture: William Cerny et al., CC BY 4.0, via Wikimedia Commons.

About Aquarius IV

Aquarius IV is about 351,107 light-years from the Sun, so the light we see from it left about 351,107 years ago.

It is 341,047 light-years from the centre of the Milky Way.

The map lists it as a dwarf galaxy and shows it at the scale of the Milky Way and the Local Group, drawn on the plane of the Milky Way.

Key numbers

Distance351,107 light-years (107.65 kpc)
Distance from the Galactic centre341,047 light-years
Galactic coordinatesl = 56.69°, b = -42.62°
Absolute magnitude (V)-1.9
Stellar mass9.77 × 10² suns
Half-light radius61 light-years

Data: Local Volume Database v1.1.1 (Pace 2025).

Where it is

Its place in the universe, from the inside out: Milky Way › Local Group › Virgo Supercluster › Laniakea Supercluster › Observable universe.

Zoom out to see it in context: Magellanic Clouds, a view about 520,000 light-years across.

From Wikipedia

Aquarius IV (also known as Rubin J2201−0234) is an ultra-faint dwarf spheroidal galaxy located in the outer halo of the Milky Way in the constellation of Aquarius, at a distance of 109 kiloparsecs from the Sun. It is the first cosmic object discovered using the preliminary data from the Vera C.

Excerpt from the Wikipedia article Aquarius IV, licensed CC BY-SA 4.0.

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