NGC 4494
Scientific overview
NGC 4494 is an elliptical galaxy in the constellation Coma Berenices. It shines at apparent magnitude 9.8 and spans about 4.35 arcminutes of sky.
Observation guide
Guidance follows standard observing practice, derived from the object's real magnitude and position. A dark, moonless sky always helps.
Location in the sky
Precision measurements
Distances and velocities from SIMBAD and redshift from NED · NGC 4494
| Distance | 5.4378e+7 ly | SIMBAD · catalogued |
| Physical size (major axis) | 68,808 ly | SIMBAD · derived |
| Physical size (minor axis) | 65,329 ly | SIMBAD · derived |
| Redshift (z) | 0.004476 ± 1.7000e-5 | NED · catalogued |
| Radial velocity | 1,318 km/s | SIMBAD · measured |
| Right ascension (ICRS) | 187.850163 deg | SIMBAD · measured |
| Declination (ICRS) | 25.77502 deg | SIMBAD · measured |
Full field-level provenance
- Distance: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · mesDistance · dist · 2019A&A...631A..38L · distance indicator: redshift · catalogued value · source value 16.6725 Mpc · retrieved 2026-07-11
- Physical size (major axis): Centre de données astronomiques de Strasbourg (CDS) · derived (OpenNGC angular size × SIMBAD distance) · physical size = angular size × distance (small-angle); angular size from OpenNGC, distance from SIMBAD mesDistance · derived · retrieved 2026-07-11
- Physical size (minor axis): Centre de données astronomiques de Strasbourg (CDS) · derived (OpenNGC angular size × SIMBAD distance) · physical size = angular size × distance (small-angle); angular size from OpenNGC, distance from SIMBAD mesDistance · derived · retrieved 2026-07-11
- Redshift (z): NASA/IPAC Extragalactic Database · NED · ObjectLookup · Redshift · 2011MNRAS.413..813C · catalogued value · NED quality UUN · retrieved 2026-07-11
- Radial velocity: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · rvz_radvel · 2002LEDA.........0P · direct catalogue measurement · retrieved 2026-07-11
- Right ascension (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · ra · 2020yCat.1350....0G · direct catalogue measurement · retrieved 2026-07-11
- Declination (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · dec · 2020yCat.1350....0G · direct catalogue measurement · retrieved 2026-07-11
Physical size is derived from the OpenNGC angular size and the catalogued distance (small-angle: size = angle × distance). Redshift is the object's measured redshift — a negative value is a blueshift (the galaxy is approaching, its motion dominated by local rather than cosmic expansion). Fields a source did not provide are omitted, never invented.
Other objects in Coma Berenices
| Object | Type | Mag | Size (′) |
|---|---|---|---|
| M 53M 53 · NGC 5024 | Globular cluster | 7.79 | 9 |
| Black Eye GalaxyM 64 · NGC 4826 | Barred spiral galaxy | 8.52 | 10.52 |
| M 85M 85 · NGC 4382 | Lenticular galaxy | 9.05 | 6.95 |
| NGC 4725NGC 4725 | Barred spiral galaxy | 9.38 | 9.71 |
| M 100M 100 · NGC 4321 | Barred spiral galaxy | 9.47 | 6.1 |
| Coma PinwheelM 99 · NGC 4254 | Spiral galaxy | 9.84 | 5.04 |
| NGC 4559C 36 · NGC 4559 | Spiral galaxy | 9.92 | 10.57 |
| NGC 5053NGC 5053 | Globular cluster | 9.96 | 4.8 |
Sources
The primary and reference sources this topic draws on.
- OpenNGCOpenNGC (M. Verga) — NGC/IC, Messier, and Caldwell catalogue data
Openly-licensed deep-sky catalogue: object types, positions, magnitudes, sizes, morphology, and cross-identifiers.