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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
north SunriseRise: 7:43  
clear_day Transit: 11:47  
SunsetSet: 15:52 south
sunny DaytimeWhat's Visible Now?
All Constellations » Hydra » 

υ2 Hydrae (upsilon2 Hydrae)

Altitude: -8.7°   Azimuth: 259.9°   Direction: West

υ2 Hydrae is a variable giant star in the constellation of Hydra.

υ2 Hydrae visual magnitude is 4.6. Because of its moderate brightness, υ2 Hydrae should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about υ2 Hydrae:


υ2 Hydrae (upsilon2 Hydrae) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -8.7°
Azimuth: 259.9°
Direction: West

Celestial coordinates and finder chart of υ2 Hydrae

υ2 Hydrae is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of υ2 Hydrae are provided in the following table:

10h 05m 07s
-13° 03’ 52”

The simplified sky map below shows the position of υ2 Hydrae in the sky:

Finder chart υ2 Hydrae (upsilon2 Hydrae) star
Simplified finder chart for υ2 Hydrae (upsilon2 Hydrae).

Visibility of υ2 Hydrae from your location

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

Today's υ2 Hydrae (upsilon2 Hydrae) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 103.1°
Max altitude: 25.5°
Azimuth: 256.9°

Digitized Sky Survey image of υ2 Hydrae

The image below is a photograph of υ2 Hydrae 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 υ2 Hydrae is -0.037 arcsec per year in Right Ascension and 0.018 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of υ2 Hydrae (upsilon2 Hydrae) star
DSS2 image of υ2 Hydrae. The red arrow shows the motion of υ2 Hydrae during the next 10000 years (-6.17 arcmin in Right Ascension and 3.00 arcmin in declination);

Distance of υ2 Hydrae from the Sun and relative movement

υ2 Hydrae is distant 276.98 light years from the Sun and it is moving far from the Sun at the speed of 28 kilometers per second.

84.96 pc
276.98 ly
28 km/s
-0.037 arcsec/year
0.018 arcsec/year

Spectral properties of υ2 Hydrae

υ2 Hydrae belongs to spectral class B9 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where υ2 Hydrae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of υ2 Hydrae. Attribution: Richard Powell / CC BY-SA

Alternative designations of υ2 Hydrae

υ2 Hydrae
(upsilon2 Hydrae)