ω2 Aquarii (omega2 Aquarii)

ω2 Aquarii is a double main-sequence star in the constellation of Aquarius.

ω2 Aquarii visual magnitude is 4.49. Because of its moderate brightness, ω2 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 ω2 Aquarii:

Color of ω2 Aquarii ⬤

Magnitude of ω2 Aquarii 4.49

Class Main-sequence

VISIBILITY RIGHT NOW ω2 Aquarii (omega2 Aquarii) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 24°.

Celestial coordinates and finder chart of ω2 Aquarii

ω2 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 ω2 Aquarii are provided in the following table:

Right Ascension J2000 23h 42m 43s

Declination J2000 -14° 32’ 41”

Galactic Longitude 67.66°

Galactic Latitude -69.64°

Constellation Aquarius

The simplified sky map below shows the position of ω2 Aquarii in the sky:

Finder chart ω2 Aquarii (omega2 Aquarii) star

Simplified finder chart for ω2 Aquarii (omega2 Aquarii).

Visibility of ω2 Aquarii from your location

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

Today's ω2 Aquarii (omega2 Aquarii) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 104.5° RISE 7:37

Max altitude: 24.0° TRANSIT 12:20

Azimuth: 255.5° SET 17:02

RIGHT NOW ω2 Aquarii (omega2 Aquarii) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of ω2 Aquarii

The image below is a photograph of ω2 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 ω2 Aquarii is 0.101 arcsec per year in Right Ascension and -0.066 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of ω2 Aquarii (omega2 Aquarii) star

DSS2 image of ω2 Aquarii. The red arrow shows the motion of ω2 Aquarii during the next 1000 years (1.68 arcmin in Right Ascension and -1.10 arcmin in declination);

Distance of ω2 Aquarii from the Sun and relative movement

ω2 Aquarii is distant 154.06 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

Distance (parsec) 47.26 pc

Distance (light year) 154.06 ly

Heliocentric radial velocity 3 km/s

Proper Motion RA 0.101 arcsec/year

Proper Motion Dec -0.066 arcsec/year

Spectral properties of ω2 Aquarii

ω2 Aquarii belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 1.12

Spectral Type B9V

Color Index (B-V) -0.04

Temperature of ω2 Aquarii 10653K

The red dot in the diagram below shows where ω2 Aquarii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of ω2 Aquarii. Attribution: Richard Powell / CC BY-SA

ω2 Aquarii star system properties

ω2 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 ω2 Aquarii double sysyem:

Main star magnitude 4.49

Secondary star magnitude 10.49

Magnitude difference 6

Separation 5 arcsec

Alternative designations of ω2 Aquarii

Bayer designation ω2 Aquarii
(omega2 Aquarii)

Flamsteed designation 105 Aquarii

Henry Draper Catalogue HD222661

SAO Catalogue SAO165842

Hipparcos Catalogue HIP116971

Durchmusterung Catalogue BD-15 6476

Gliese Catalogue Wo 9836 A

FK5 Catalogue 894

Aitken Double Star Catalogue ADS16944

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Other stars in Aquarius