λ Aquarii (lambda Aquarii)

λ Aquarii is a variable giant star in the constellation of Aquarius.

λ Aquarii visual magnitude is 3.74. Because of its moderate brightness, λ 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 λ Aquarii:

Color of λ Aquarii ⬤

Magnitude of λ Aquarii 3.74

Class Giant

VISIBILITY RIGHT NOW λ Aquarii (lambda Aquarii) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 23°.

Celestial coordinates and finder chart of λ Aquarii

λ 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 λ Aquarii are provided in the following table:

Right Ascension J2000 22h 52m 36s

Declination J2000 -07° 34’ 46”

Galactic Longitude 62.19°

Galactic Latitude -55.73°

Constellation Aquarius

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

Finder chart λ Aquarii (lambda Aquarii) star

Simplified finder chart for λ Aquarii (lambda Aquarii).

Visibility of λ Aquarii from your location

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

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

Azimuth: 97.6° RISE 5:22

Max altitude: 30.9° TRANSIT 10:42

Azimuth: 262.4° SET 16:01

RIGHT NOW λ Aquarii (lambda Aquarii) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of λ Aquarii

The image below is a photograph of λ 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 λ Aquarii is 0.011 arcsec per year in Right Ascension and 0.037 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of λ Aquarii (lambda Aquarii) star

DSS2 image of λ Aquarii. The red arrow shows the motion of λ Aquarii during the next 10000 years (1.83 arcmin in Right Ascension and 6.17 arcmin in declination);

Distance of λ Aquarii from the Sun and relative movement

λ Aquarii is distant 391.36 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.

Distance (parsec) 120.05 pc

Distance (light year) 391.36 ly

Heliocentric radial velocity -9 km/s

Proper Motion RA 0.011 arcsec/year

Proper Motion Dec 0.037 arcsec/year

Spectral properties of λ Aquarii

λ Aquarii belongs to spectral class M2 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.66

Spectral Type M2III

Color Index (B-V) 1.64

Temperature of λ Aquarii 3594K

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

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

Alternative designations of λ Aquarii

Bayer designation λ Aquarii
(lambda Aquarii)

Flamsteed designation 73 Aquarii

Henry Draper Catalogue HD216386

SAO Catalogue SAO146362

Hipparcos Catalogue HIP112961

Durchmusterung Catalogue BD-08 5968

FK5 Catalogue 864

General Catalogue of Variable Stars Lam Aqr

How to support us

In Evidence

Other stars in Aquarius