Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

ψ1 Aquarii (psi1 Aquarii)

ψ1 Aquarii is a multiple hypergiant star in the constellation of Aquarius.

ψ1 Aquarii visual magnitude is 4.21. Because of its moderate brightness, ψ1 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 ψ1 Aquarii:

4.21
Hypergiant
ψ1 Aquarii (psi1 Aquarii) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 29°.

Celestial coordinates and finder chart of ψ1 Aquarii

ψ1 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 ψ1 Aquarii are provided in the following table:

23h 15m 53s
-09° 05’ 16”
67.07°
-61.11°
Aquarius

The simplified sky map below shows the position of ψ1 Aquarii in the sky:

Finder chart ψ1 Aquarii (psi1 Aquarii) star
Simplified finder chart for ψ1 Aquarii (psi1 Aquarii).

Visibility of ψ1 Aquarii from your location

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

Today's ψ1 Aquarii (psi1 Aquarii) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 99.1°
Max altitude: 29.4°
Azimuth: 260.9°
ψ1 Aquarii (psi1 Aquarii) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of ψ1 Aquarii

The image below is a photograph of ψ1 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 ψ1 Aquarii is 0.372 arcsec per year in Right Ascension and -0.016 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of ψ1 Aquarii (psi1 Aquarii) star
DSS2 image of ψ1 Aquarii. The red arrow shows the motion of ψ1 Aquarii during the next 1000 years (6.20 arcmin in Right Ascension and -0.27 arcmin in declination);

Distance of ψ1 Aquarii from the Sun and relative movement

ψ1 Aquarii is distant 148.38 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

45.52 pc
148.38 ly
-26 km/s
0.372 arcsec/year
-0.016 arcsec/year

Spectral properties of ψ1 Aquarii

ψ1 Aquarii belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

0.92
K0III
4493K

The red dot in the diagram below shows where ψ1 Aquarii is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of ψ1 Aquarii. Attribution: Richard Powell / CC BY-SA

ψ1 Aquarii star system properties

ψ1 Aquarii is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the ψ1 Aquarii double sysyem:

4.21
9.01
4.8
49.2 arcsec

Alternative designations of ψ1 Aquarii

ψ1 Aquarii
(psi1 Aquarii)
SAO146598
SAO146598
Gl 893.2A