The Intergalactic Wanderer, cataloged as NGC 2419 and Caldwell 25, is one of the most remote globular clusters accessible to amateur astrophotographers, glowing at an apparent magnitude of 10.05. Its compact angular size of 4.1′ combined with a surface brightness of 21.7424 mag/arcsec² means that long focal lengths and steady seeing are rewarded with a wealth of resolved stellar detail. Because the cluster is so small on the sky, imagers typically favor larger apertures and precise autoguiding to tease out its faint outer halo of stars. Careful stacking of many sub-exposures helps bring up the delicate concentration of the core against the dark background of Lynx.
Names and Catalog numbers
- Intergalactic Wanderer
- C 25 (Caldwell 25)
- NGC 2419
Position and the cosmic neighborhood
The Intergalactic Wanderer sits at right ascension 07h 38m 08.51s and declination +38° 52′ 54.9″ within the faint, sprawling constellation Lynx, a region of the northern sky lacking bright guide stars, which makes plate-solving and precise pointing invaluable for framing NGC 2419. Positioned high above the galactic plane and at an extraordinary distance of roughly 271,000 light-years, this globular cluster appears isolated in a sparse star field, giving astrophotographers a clean, uncluttered canvas. Its measured radial velocity of -20.6 km/s reflects its motion through the outermost reaches of our galaxy’s halo, far beyond the crowded star clouds of the Milky Way.
Nice to Know
- Its evocative nickname, the Intergalactic Wanderer, arose because at about 271,000 light-years it lies so far out that it was once thought to be escaping the Milky Way entirely.
- Despite spanning a physical diameter of roughly 323 light-years, its remoteness compresses it into a modest angular size of just 4.1′ on the sky.
- At magnitude 10.05 it is a comfortable target for imaging setups, yet its distance makes resolving individual stars a genuine test of aperture and seeing.
- It carries two well-known catalog designations, NGC 2419 and Caldwell 25, marking it as a favorite showpiece object among deep-sky enthusiasts.
Brightness, distance and size
The object has an apparent magnitude of 10.1 mag, it lies about 271,000 light-years from Earth and spans roughly 323 light-years across. On the sky it appears about 4.1′ in size.
