HR8121

Below the horizon. Rise: 16:19 | Tran: 22:18 | Set: 4:21

Alt: -14.61° Az: 289.46° Direction: West-North-West

HR8121 is a variable giant star of spectral class M1 in the constellation of Aquarius.

HR8121 visual magnitude is 6.38. Because of its faintness, HR8121 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of HR8121. The red arrow shows the motion of HR8121 during the next 10000 years (4.67 arcmin in Right Ascension and -1.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 21h 15m 52s

Declination +00° 11’ 44”

Hour Angle 07h 36m 39s

Sideral Time 04h 52m 31s

J2000

Right Ascension 21h 14m 36s

Declination +00° 05’ 31”

Galactic Coordinates

Galactic Longitude 51.22°

Galactic Latitude -31.32°

Finder Chart

Simplified finder chart for HR8121.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.38

Class Giant

Absolute magnitude -0.23

Spectral Type M1III

Color Index (B-V) 1.61

Temperature 3635K

The red dot in the diagram below shows where HR8121 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR8121. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR8121 is distant 684.87 light years from the Sun and it is moving towards the Sun at the speed of 124 kilometers per second.

Distance (parsec) 210.08

Distance (light year) 684.87

Radial Speed -124 km/s

Proper Motion RA 0.028 arcsec/y

Proper Motion Dec -0.009"/y

Alternative Designations

Henry Draper Catalogue HD202259

SAO Catalogue SAO145229

Hipparcos Catalogue HIP104872

Durchmusterung Catalogue BD-00 4186

General Catalogue of Variable Stars 13614

Visibility from Your Location

Today's HR8121 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 89.8° RISE 16:19

Max altitude: 38.7° TRANSIT 22:18

Azimuth: 270.2° SET 4:21

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

Location

Other stars in Aquarius