NGC 4236
Scientific overview
NGC 4236 is a barred spiral galaxy in the constellation Draco. It shines at apparent magnitude 9.77 and spans about 23.5 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 · NGC 4236
| Distance | 1.6438e+7 ly | SIMBAD · catalogued |
| Physical size (major axis) | 112,370 ly | SIMBAD · derived |
| Physical size (minor axis) | 32,755 ly | SIMBAD · derived |
| Radial velocity | -8 km/s | SIMBAD · measured |
| Right ascension (ICRS) | 184.175492 deg | SIMBAD · measured |
| Declination (ICRS) | 69.462569 deg | SIMBAD · measured |
Full field-level provenance
- Distance: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · mesDistance · dist · 2022MNRAS.511.6160K · distance indicator: T-F · catalogued value · source value 5.04 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
- Radial velocity: Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · rvz_radvel · 2020ApJ...902..145K · direct catalogue measurement · retrieved 2026-07-11
- Right ascension (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · ra · 2006AJ....131.1163S · direct catalogue measurement · retrieved 2026-07-11
- Declination (ICRS): Centre de données astronomiques de Strasbourg (CDS) · SIMBAD · basic · dec · 2006AJ....131.1163S · 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 Draco
| Object | Type | Mag | Size (′) |
|---|---|---|---|
| Cat's Eye NebulaC 6 · NGC 6543 | Planetary nebula | 9.01 | 0.9 |
| NGC 4125NGC 4125 | Elliptical galaxy | 9.71 | 5.87 |
| NGC 5866NGC 5866 | Lenticular galaxy | 9.89 | 6.31 |
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.