IAU Constellation (Col) · Genitive: Columbae · Southern Sky

Columba (The Dove) Constellation Guide

Columba IAU constellation (270 sq deg, rank 54): February southern sky south of Lepus, anchored by Phact (+2.65), Wazn, and runaway star Mu Columbae.

Solid-Angle Area270 sq deg (Rank #54 of 88)
Best Evening MonthFebruary
Visibility Latitudes+45° to −90°
Brightest StarPhact (Alpha Columbae) (+2.65)

Sky Navigation & Astrophysical Context

Situated directly south of Lepus and west of Canis Major across 270 square degrees of the winter southern sky, Columba was carved out of the unformed southern stars of Canis Major by Petrus Plancius in 1592 as 'Columba Noachi' (Noah's Dove carrying the olive branch) and simultaneously relates to the dove released by the Argonauts through the Symplegades rocks alongside nearby Argo Navis.

The Dove is anchored by a pair of bright third-magnitude stars separated by 2.4°: Phact (Alpha Columbae, V = +2.65), a rapidly rotating B7 IVe shell star at 80 parsecs, and Wazn (Beta Columbae, V = +3.12), a K1.5 III orange giant whose high space velocity projects near the solar antapex—the direction in space away from which our Sun moves relative to the Local Standard of Rest.

Columba also hosts the famous 5th-magnitude O9.5 V runaway star Mu Columbae, which was dynamically ejected from the Trapezium Cluster in the Orion Nebula ~2.5 million years ago in the exact opposite direction of AE Aurigae (in Auriga) following a close four-body binary encounter, as well as the bright galactic halo globular cluster NGC 1851 (Caldwell 73).

Bordering IAU Constellations: Lepus, Canis Major, Puppis, Pictor, Caelum.

Equatorial Center Position & Transit Altitude

Columba is centered near Right Ascension 05h 51m 36s, Declination −35° 05′ 24″ (The Dove).

J2000 Equatorial Sky Position (Columba) +90° 0° −90° 24h 12h RA 0h Peak Meridian Altitude 15° 40°N Lat 85° 30°S Lat RA: 05h 51m 36s Dec: −35° 05′ 24″ Epoch: J2000.0 · 270 sq deg (Rank #54) First-party vector diagram derived from IAU / CDS SIMBAD / Gaia DR3 astrometry.

Practical Star-Hopping & Observing Tips

  • Drop a vertical line 25° south from Orion's Belt through Lepus to land on the bright pair Phact (+2.65) and Wazn (+3.12).
  • Sweep 5.5° southwest of Phact with a 100 mm+ telescope to spot the concentrated 8-arcminute globe of globular cluster NGC 1851 (V = +7.1).
  • Locate magnitude +5.18 Mu Columbae 2° north of Alpha Columbae—a blue O-type star racing away from the Orion Nebula at over 100 km/s.

Notable Celestial Objects in & Near Columba

Cataloged Stars and Deep-Sky Objects Associated with Columba
ObjectFamilyClassificationRA (J2000)Dec (J2000)Min. Instrument
Sirius (Alpha Canis Majoris Binary)starsSpectroscopic & visual binary (A-type main-sequence + DA2 white dwarf)06h 45m 08.92s-16° 42′ 58.0″Naked eye (100–150 mm telescope under steady seeing to split Sirius B)
Rigel (Beta Orionis Blue Supergiant)starsBlue supergiant multiple star system (Alpha Cygni variable)05h 14m 32.27s-08° 12′ 05.9″Naked eye (60–100 mm telescope at 120×+ to split companion Rigel BC)

Scientific Sources Cited