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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 5:39  
clear_day Transit: 12:56  
SunsetSet: 20:14
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All Constellations » Octans » 

HR8129

Altitude: -49.4°   Azimuth: 187.5°   Direction: South

HR8129 is a variable giant star in the constellation of Octans.

HR8129 visual magnitude is 6.45. Because of its reltive faintness, HR8129 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR8129 is 0.045 arcsec per year in Right Ascension and -0.027 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR8129 star
DSS2 image of HR8129. The red arrow shows the motion of HR8129 during the next 10000 years (7.50 arcmin in Right Ascension and -4.50 arcmin in declination);

Key facts about HR8129

6.45
Giant

HR8129 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -49.4°
Azimuth: 187.5°
Direction: South

Celestial coordinates and finder chart of HR8129

HR8129 is situated close to the southern celestial pole and, as such, it is easilty visible for most part of the year from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR8129 are provided in the following table:

21h 32m 04s
-84° 48’ 36”
307.53°
-30.4°
Octans

The simplified sky map below shows the position of HR8129 in the sky:

Finder chart HR8129 star
Simplified finder chart for HR8129.

Visibility of HR8129 from your location

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

HR8129 is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of HR8129 from the Sun and relative movement

HR8129 is distant 666.67 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

204.50 pc
666.67 ly
15 km/s
0.045 arcsec/year
-0.027 arcsec/year

Spectral properties of HR8129

HR8129 belongs to spectral class K3 and has a luminosity class of III corresponding to a giant star.

-0.10
K3III
3950K

The red dot in the diagram below shows where HR8129 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8129. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8129

SAO258899
SAO258899