The sky around NGC 4993 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.
NGC 4993 is a lenticular galaxy (E-S0) in Hydra, 128 million light-years away
NGC 4993 (NGC 4994, ESO 508-018, PGC 45657) is a lenticular galaxy (E-S0) in the constellation Hydra, 128 million light-years away. It shines at magnitude 13.4 and spans 1.6′ × 1.4′ of sky, about 57,700 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.
NGC 4993 is AM 1307-230 in the Arp-Madore catalog
Halton Arp and Barry Madore listed it in A Catalogue of Southern Peculiar Galaxies and Associations (1987), from their search of the UK Schmidt southern sky survey plates. The number 1307-230 is its position: right ascension 13h 07m and declination -23.0°.
Finding NGC 4993 from Naga
NGC 4993 lies 2.1° west of Naga, the magnitude 3.0 star. That is within one binocular field.
NGC 4993 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 southern hemisphere and north to about 67°N, and never sets south of 67°S.
NGC 4993 is 128 million light-years away
The light seen from NGC 4993 tonight left it about 128 million years ago, long before modern humans existed. It ranks 253 of 422 by distance among the galaxies on Go Astronomy. Distance source: Cosmicflows-4 (Tully et al. 2023).
Objects within 6° of NGC 4993
No other Messier, Caldwell or Herschel 400 object lies within 6°.
NGC 4993 catalog data
Field
Value
Designations
NGC 4994, ESO 508-018, PGC 45657, NGC 4993, AM 1307-230