Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
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All Constellations » Hydrus » 

π1 Hydri (pi1 Hydri)

π1 Hydri is a variable giant star in the constellation of Hydrus.

π1 Hydri visual magnitude is 5.55. Because of its reltive faintness, π1 Hydri should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about π1 Hydri:

π1 Hydri (pi1 Hydri) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of π1 Hydri

π1 Hydri is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of π1 Hydri are provided in the following table:

02h 14m 14s
-67° 50’ 30”

The simplified sky map below shows the position of π1 Hydri in the sky:

Finder chart π1 Hydri (pi1 Hydri) star
Simplified finder chart for π1 Hydri (pi1 Hydri).

Visibility of π1 Hydri from your location

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

π1 Hydri (pi1 Hydri) is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of π1 Hydri

The image below is a photograph of π1 Hydri 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 π1 Hydri is 0.037 arcsec per year in Right Ascension and 0.037 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of π1 Hydri (pi1 Hydri) star
DSS2 image of π1 Hydri. The red arrow shows the motion of π1 Hydri during the next 10000 years (6.17 arcmin in Right Ascension and 6.17 arcmin in declination);

Distance of π1 Hydri from the Sun and relative movement

π1 Hydri is distant 739.23 light years from the Sun and it is moving far from the Sun at the speed of 26 kilometers per second.

226.76 pc
739.23 ly
26 km/s
0.037 arcsec/year
0.037 arcsec/year

Spectral properties of π1 Hydri

π1 Hydri belongs to spectral class M1 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where π1 Hydri is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of π1 Hydri. Attribution: Richard Powell / CC BY-SA

Alternative designations of π1 Hydri

π1 Hydri
(pi1 Hydri)