104 Aquarii

104 Aquarii is a variable and multiple hypergiant star in the constellation of Aquarius.

104 Aquarii visual magnitude is 4.82. Because of its moderate brightness, 104 Aquarii should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about 104 Aquarii:

Color of 104 Aquarii ⬤

Magnitude of 104 Aquarii 4.82

Class Hypergiant

VISIBILITY RIGHT NOW 104 Aquarii is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of 104 Aquarii

104 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 104 Aquarii are provided in the following table:

Right Ascension J2000 23h 41m 45s

Declination J2000 -17° 48’ 59”

Galactic Longitude 59.4°

Galactic Latitude -71.44°

Constellation Aquarius

The simplified sky map below shows the position of 104 Aquarii in the sky:

Simplified finder chart for 104 Aquarii.

Visibility of 104 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 104 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: 107.8° RISE 3:40

Max altitude: 20.7° TRANSIT 8:03

Azimuth: 252.2° SET 12:27

RIGHT NOW 104 Aquarii is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 104 Aquarii

The image below is a photograph of 104 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 104 Aquarii is 0.015 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 104 Aquarii. The red arrow shows the motion of 104 Aquarii during the next 10000 years (2.50 arcmin in Right Ascension and 0.67 arcmin in declination);

Distance of 104 Aquarii from the Sun and relative movement

104 Aquarii is distant 643.00 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

Distance (parsec) 197.24 pc

Distance (light year) 643.00 ly

Heliocentric radial velocity 3 km/s

Proper Motion RA 0.015 arcsec/year

Proper Motion Dec 0.004 arcsec/year

Spectral properties of 104 Aquarii

104 Aquarii belongs to spectral class G0 and has a luminosity class of I corresponding to a hypergiant star.

Absolute magnitude -1.65

Spectral Type G0I

Color Index (B-V) 0.82

Temperature of 104 Aquarii 5221K

The red dot in the diagram below shows where 104 Aquarii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 104 Aquarii. Attribution: Richard Powell / CC BY-SA

104 Aquarii star system properties

104 Aquarii is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 104 Aquarii double sysyem:

Main star magnitude 4.82

Secondary star magnitude 7.62

Magnitude difference 2.8

Separation 120.1 arcsec

Alternative designations of 104 Aquarii

Flamsteed designation 104 Aquarii

Henry Draper Catalogue HD222574

SAO Catalogue SAO165836

Hipparcos Catalogue HIP116901

Durchmusterung Catalogue BD-18 6358

General Catalogue of Variable Stars 14671

In Evidence

Other stars in Aquarius