The sky around NGC 4789A at true scale, north up and east left, with stars to magnitude 8. The circles show the field of a low-power eyepiece and of 10×50 binoculars.
UGC 8024 · PGC 43869
NGC 4789A
Irregular galaxy (I) in
Irregular galaxy (I) in , 13 million light-years away.
NGC 4789A is an irregular galaxy (I) in , 13 million light-years away
NGC 4789A (UGC 8024, PGC 43869) is an irregular galaxy (I) in the constellation , 13 million light-years away. It shines at magnitude 13.9 and spans 1.9′ × 1.2′ of sky, about 7,130 light-years across. It is a telescope object, 6 inches or larger, and it is highest in the evening sky in May.
Galaxy: a system of billions of stars, gas and dust held together by gravity, far outside the Milky Way. Spiral galaxies have a disk with arms; elliptical galaxies are smooth, round or oval swarms of older stars.
Finding NGC 4789A from Cor Caroli
NGC 4789A lies 11.2° south of Cor Caroli, the magnitude 2.9 star. A fist held at arm's length covers about 10°.
NGC 4789A is highest in the evening in May
The chart gives its height above the horizon at 9 pm through the year, from 60°N to 40°S. It can be seen from the whole northern hemisphere and south to about 63°S, and never sets north of 63°N.
NGC 4789A is 13 million light-years away
The light seen from NGC 4789A tonight left it about 13 million years ago, long before modern humans existed. It ranks 40 of 422 by distance among the galaxies on Go Astronomy. Distance source: Cosmicflows-4 (Tully et al. 2023).
