99 Aquarii

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

99 Aquarii visual magnitude is 4.39. Because of its moderate brightness, 99 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 99 Aquarii:

Color of 99 Aquarii ⬤

Magnitude of 99 Aquarii 4.39

Class Giant

VISIBILITY RIGHT NOW 99 Aquarii is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of 99 Aquarii

99 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 99 Aquarii are provided in the following table:

Right Ascension J2000 23h 26m 02s

Declination J2000 -20° 38’ 30”

Galactic Longitude 46.74°

Galactic Latitude -69.46°

Constellation Aquarius

The simplified sky map below shows the position of 99 Aquarii in the sky:

Simplified finder chart for 99 Aquarii.

Visibility of 99 Aquarii from your location

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

Today's 99 Aquarii rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 110.6° RISE 7:21

Max altitude: 17.9° TRANSIT 11:27

Azimuth: 249.4° SET 15:32

RIGHT NOW 99 Aquarii is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 99 Aquarii

The image below is a photograph of 99 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 99 Aquarii is -0.052 arcsec per year in Right Ascension and -0.058 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 99 Aquarii. The red arrow shows the motion of 99 Aquarii during the next 10000 years (-8.67 arcmin in Right Ascension and -9.67 arcmin in declination);

Distance of 99 Aquarii from the Sun and relative movement

99 Aquarii is distant 308.42 light years from the Sun and it is moving far from the Sun at the speed of 16 kilometers per second.

Distance (parsec) 94.61 pc

Distance (light year) 308.42 ly

Heliocentric radial velocity 16 km/s

Proper Motion RA -0.052 arcsec/year

Proper Motion Dec -0.058 arcsec/year

Spectral properties of 99 Aquarii

99 Aquarii belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.49

Spectral Type K5III

Color Index (B-V) 1.47

Temperature of 99 Aquarii 3839K

The red dot in the diagram below shows where 99 Aquarii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 99 Aquarii. Attribution: Richard Powell / CC BY-SA

Alternative designations of 99 Aquarii

Flamsteed designation 99 Aquarii

Henry Draper Catalogue HD220704

SAO Catalogue SAO191900

Hipparcos Catalogue HIP115669

Durchmusterung Catalogue BD-21 6420

General Catalogue of Variable Stars 14554

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Other stars in Aquarius