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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 » 

μ1 Octantis (mu1 Octantis)

Altitude: -38.0°   Azimuth: 184.2°   Direction: South

μ1 Octantis is a giant star in the constellation of Octans.

μ1 Octantis visual magnitude is 6. Because of its reltive faintness, μ1 Octantis 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 μ1 Octantis is 0.18 arcsec per year in Right Ascension and -0.006 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of μ1 Octantis (mu1 Octantis) star
DSS2 image of μ1 Octantis. The red arrow shows the motion of μ1 Octantis during the next 1000 years (3.00 arcmin in Right Ascension and -0.10 arcmin in declination);

Key facts about μ1 Octantis

6
Giant

μ1 Octantis (mu1 Octantis) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -38.0°
Azimuth: 184.2°
Direction: South

Celestial coordinates and finder chart of μ1 Octantis

μ1 Octantis 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 μ1 Octantis are provided in the following table:

20h 42m 02s
-76° 10’ 50”
317.51°
-32.78°
Octans

The simplified sky map below shows the position of μ1 Octantis in the sky:

Finder chart μ1 Octantis (mu1 Octantis) star
Simplified finder chart for μ1 Octantis (mu1 Octantis).

Visibility of μ1 Octantis from your location

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

μ1 Octantis (mu1 Octantis) is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of μ1 Octantis from the Sun and relative movement

μ1 Octantis is distant 336.78 light years from the Sun and it is moving towards the Sun at the speed of 36 kilometers per second.

103.31 pc
336.78 ly
-36 km/s
0.18 arcsec/year
-0.006 arcsec/year

Spectral properties of μ1 Octantis

μ1 Octantis belongs to spectral class F4 and has a luminosity class of III corresponding to a giant star.

0.93
F4III
6674K

The red dot in the diagram below shows where μ1 Octantis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of μ1 Octantis. Attribution: Richard Powell / CC BY-SA

Alternative designations of μ1 Octantis

μ1 Octantis
(mu1 Octantis)
SAO257838
SAO257838