ο Aquarii (omicron Aquarii)

Altitude: 20.6° Azimuth: 122.4° Direction: East-South-East

ο Aquarii is a variable sub-giant star in the constellation of Aquarius.

ο Aquarii visual magnitude is 4.69. Because of its moderate brightness, ο 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 ο Aquarii:

Color of ο Aquarii ⬤

Magnitude of ο Aquarii 4.69

Class Sub-giant

VISIBILITY RIGHT NOW

ο Aquarii (omicron Aquarii) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 20.6°
Azimuth: 122.4°
Direction: East-South-East

Celestial coordinates and finder chart of ο Aquarii

ο 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 ο Aquarii are provided in the following table:

Right Ascension J2000 22h 03m 18s

Declination J2000 -02° 09’ 19”

Galactic Longitude 57.44°

Galactic Latitude -42.67°

Constellation Aquarius

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

Finder chart ο Aquarii (omicron Aquarii) star

Simplified finder chart for ο Aquarii (omicron Aquarii).

Visibility of ο 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 ο Aquarii (omicron 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: 92.2° RISE 11:26

Max altitude: 36.4° TRANSIT 17:14

Azimuth: 267.8° SET 23:01

Digitized Sky Survey image of ο Aquarii

The image below is a photograph of ο 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 ο Aquarii is 0.028 arcsec per year in Right Ascension and -0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ο Aquarii (omicron Aquarii) star

DSS2 image of ο Aquarii. The red arrow shows the motion of ο Aquarii during the next 10000 years (4.67 arcmin in Right Ascension and -2.00 arcmin in declination);

Distance of ο Aquarii from the Sun and relative movement

ο Aquarii is distant 380.84 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

Distance (parsec) 116.82 pc

Distance (light year) 380.84 ly

Heliocentric radial velocity 12 km/s

Proper Motion RA 0.028 arcsec/year

Proper Motion Dec -0.012 arcsec/year

Spectral properties of ο Aquarii

ο Aquarii belongs to spectral class B7 and has a luminosity class of IV corresponding to a sub-giant star.

Absolute magnitude -0.65

Spectral Type B7IV

Color Index (B-V) -0.06

Temperature of ο Aquarii 10941K

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

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

Alternative designations of ο Aquarii

Bayer designation ο Aquarii
(omicron Aquarii)

Flamsteed designation 31 Aquarii

Henry Draper Catalogue HD209409

SAO Catalogue SAO145837

Hipparcos Catalogue HIP108874

Durchmusterung Catalogue BD-02 5681

FK5 Catalogue 3765

General Catalogue of Variable Stars Omi Aqr

Support us

In Evidence

Other stars in Aquarius