Aqr is a constellation comprised primarily of the star Ancha, formally designated as a minor constellation, Aqr, located in the constellation Aqr. Its notable magnitude is 3.927, placing it within the relatively dim stellar region of our own galaxy. It is
Ancha is recognizable through its distinct characteristics – it presents a shimmering, blue appearance. The star’s location within its orbit gives it a unique spectral characteristic, characteristic of a star significantly older than our Sun – suggesting a long lifespan. It is notable for not exhibiting a typical yellow or orange hue, preferring instead a cool and pale blue. Given its position within the Milky Way, Ancha’s trajectory has allowed it to be visually observed and identified as a relatively clear object in the night sky, especially over the Southern Hemisphere.
Given Ancha’s existence, there's an interesting historical element. Ancient cultures recorded Ancha, and it also became renowned in medieval Europe, representing a ‘gift of the sky’ associated with wisdom, guidance, and even divination. Early attempts to categorize it were largely subjective, but its appearance frequently appeared within astrological interpretations across different regions of the world.
Its spectral signature, though subtle, points to a spectral type that leans towards a cooler, less hot star compared to many others within its region. Furthermore, observations of Ancha’s proper motion reveal its relatively steady, albeit slow, movement across the galactic plane.
How to see it
Ancha has a visual magnitude of about 3.93: under a reasonably dark sky it is typically reachable with the unaided eye.
Sky position
Equatorial coordinates for Ancha: right ascension 22h 16m 50s, declination −7° 47′ 0″ (J2000), in the region of the Aquarius constellation (IAU figure Aqr).
Catalog context
Ancha. It appears in classical and modern catalogs as Bayer/Flamsteed designation 43The Aqr, HIP 110003, HD 211391, Gaia DR3 2616542115933350144. In the SkyKeepsake Aquarius (Aqr) browse hub it sits with other stars of the same IAU figure.
Catalog identifiers
- Gaia
- Gaia DR3 2616542115933350144
- HIP
- 110003
- HD
- 211391
- gaia_dr3
- 2616542115933350144
- Bayer / Flamsteed
- 43The Aqr
Observed properties
- Visual magnitude
- 3.93