101 Aquarii

Below the horizon. Rise: 20:51 | Tran: 1:00 | Set: 5:05

Alt: -51.34° Az: 48.81° Direction: North-East

101 Aquarii is a double star of spectral class A1 in the constellation of Aquarius.

101 Aquarii visual magnitude is 4.71. Because of its moderate brightness, 101 Aquarii is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

DSS2 image of 101 Aquarii. The red arrow shows the motion of 101 Aquarii during the next 10000 years (-1.17 arcmin in Right Ascension and 2.17 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 23h 34m 33s

Declination -20° 46’ 40”

Hour Angle 14h 00m 44s

Sideral Time 13h 35m 18s

J2000

Right Ascension 23h 33m 16s

Declination -20° 54’ 51”

Galactic Coordinates

Galactic Longitude 47.93°

Galactic Latitude -71.13°

Finder Chart

Simplified finder chart for 101 Aquarii.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.71

Class

Absolute magnitude -0.25

Spectral Type A1

Color Index (B-V) 0.02

Temperature 9882K

The red dot in the diagram below shows where 101 Aquarii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 101 Aquarii. Attribution: Richard Powell / CC BY-SA

Star System Properties

101 Aquarii is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the 101 Aquarii double sysyem:

Main star magnitude 4.71

Secondary star magnitude 7.01

Magnitude difference 2.3

Separation 1 arcsec

Distance, Radial Speed, Proper Motion

101 Aquarii is distant 320.24 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

Distance (parsec) 98.23

Distance (light year) 320.24

Radial Speed 15 km/s

Proper Motion RA -0.007 arcsec/y

Proper Motion Dec 0.013"/y

Alternative Designations

Flamsteed designation 101 Aquarii

Henry Draper Catalogue HD221565

SAO Catalogue SAO191988

Hipparcos Catalogue HIP116247

Durchmusterung Catalogue BD-21 6437

Visibility from Your Location

Today's 101 Aquarii rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 110.8° RISE 20:51

Max altitude: 17.7° TRANSIT 1:00

Azimuth: 249.2° SET 5:05

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Aquarius