51 Aquarii

51 Aquarii is a multiple hypergiant star in the constellation of Aquarius.

51 Aquarii visual magnitude is 5.78. Because of its reltive faintness, 51 Aquarii should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 51 Aquarii:

Color of 51 Aquarii ⬤

Magnitude of 51 Aquarii 5.78

Class Hypergiant

VISIBILITY RIGHT NOW 51 Aquarii is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of 51 Aquarii

51 Aquarii is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 51 Aquarii are provided in the following table:

Right Ascension J2000 22h 24m 06s

Declination J2000 -04° 50’ 12”

Galactic Longitude 58.72°

Galactic Latitude -48.44°

Constellation Aquarius

The simplified sky map below shows the position of 51 Aquarii in the sky:

Simplified finder chart for 51 Aquarii.

Visibility of 51 Aquarii from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's 51 Aquarii rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 94.8° RISE 1:20

Max altitude: 33.7° TRANSIT 6:54

Azimuth: 265.2° SET 12:27

RIGHT NOW 51 Aquarii is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 51 Aquarii

The image below is a photograph of 51 Aquarii from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 51 Aquarii is 0.033 arcsec per year in Right Ascension and -0.004 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 51 Aquarii. The red arrow shows the motion of 51 Aquarii during the next 10000 years (5.50 arcmin in Right Ascension and -0.67 arcmin in declination);

Distance of 51 Aquarii from the Sun and relative movement

51 Aquarii is distant 423.93 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

Distance (parsec) 130.04 pc

Distance (light year) 423.93 ly

Heliocentric radial velocity 6 km/s

Proper Motion RA 0.033 arcsec/year

Proper Motion Dec -0.004 arcsec/year

Spectral properties of 51 Aquarii

51 Aquarii belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.

Absolute magnitude 0.21

Spectral Type A0V

Color Index (B-V) -0.04

Temperature of 51 Aquarii 10653K

The red dot in the diagram below shows where 51 Aquarii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 51 Aquarii. Attribution: Richard Powell / CC BY-SA

Alternative designations of 51 Aquarii

Flamsteed designation 51 Aquarii

Henry Draper Catalogue HD212404

SAO Catalogue SAO146067

Hipparcos Catalogue HIP110578

Durchmusterung Catalogue BD-05 5780

Aitken Double Star Catalogue ADS15902

In Evidence

Other stars in Aquarius