1 Aquarii

1 Aquarii is a multiple giant star in the constellation of Aquarius.

1 Aquarii visual magnitude is 5.16. Because of its reltive faintness, 1 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 1 Aquarii:

Color of 1 Aquarii ⬤

Magnitude of 1 Aquarii 5.16

Class Giant

VISIBILITY RIGHT NOW 1 Aquarii is above the horizon from Greenwich, United Kingdom [change]. Altitude: 26°.

Celestial coordinates and finder chart of 1 Aquarii

1 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 1 Aquarii are provided in the following table:

Right Ascension J2000 20h 39m 24s

Declination J2000 +00° 29’ 11”

Galactic Longitude 46.47°

Galactic Latitude -23.58°

Constellation Aquarius

The simplified sky map below shows the position of 1 Aquarii in the sky:

Simplified finder chart for 1 Aquarii.

Visibility of 1 Aquarii from your location

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

Today's 1 Aquarii rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 89.5° RISE 2:36

Max altitude: 39.0° TRANSIT 8:37

Azimuth: 270.5° SET 14:37

RIGHT NOW 1 Aquarii is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 1 Aquarii

The image below is a photograph of 1 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 1 Aquarii is 0.101 arcsec per year in Right Ascension and -0.015 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of 1 Aquarii. The red arrow shows the motion of 1 Aquarii during the next 1000 years (1.68 arcmin in Right Ascension and -0.25 arcmin in declination);

Distance of 1 Aquarii from the Sun and relative movement

1 Aquarii is distant 244.56 light years from the Sun and it is moving towards the Sun at the speed of 43 kilometers per second.

Distance (parsec) 75.02 pc

Distance (light year) 244.56 ly

Heliocentric radial velocity -43 km/s

Proper Motion RA 0.101 arcsec/year

Proper Motion Dec -0.015 arcsec/year

Spectral properties of 1 Aquarii

1 Aquarii belongs to spectral class K1 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 0.78

Spectral Type K1III

Color Index (B-V) 1.06

Temperature of 1 Aquarii 4603K

The red dot in the diagram below shows where 1 Aquarii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 1 Aquarii. Attribution: Richard Powell / CC BY-SA

1 Aquarii star system properties

1 Aquarii is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 1 Aquarii double sysyem:

Main star magnitude 5.16

Secondary star magnitude 12.26

Magnitude difference 7.1

Separation 59.7 arcsec

Alternative designations of 1 Aquarii

Flamsteed designation 1 Aquarii

Henry Draper Catalogue HD196758

SAO Catalogue SAO126062

Hipparcos Catalogue HIP101936

Durchmusterung Catalogue BD-00 4064

FK5 Catalogue 3651

Aitken Double Star Catalogue ADS14108

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Other stars in Aquarius