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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: 7:41  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
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All Constellations » Gemini » 

Jishui - ο Geminorum (omicron Geminorum)

Altitude: 72.5°   Azimuth: 162.4°   Direction: South-South-East

Jishui, also designated as ο Geminorum (omicron Geminorum), is a giant star in the constellation of Gemini.

Jishui visual magnitude is 4.9. Because of its moderate brightness, Jishui 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 Jishui:


Jishui - ο Geminorum (omicron Geminorum) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 72.5°
Azimuth: 162.4°
Direction: South-South-East

Celestial coordinates and finder chart of Jishui

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

07h 39m 09s
+34° 35’ 03”

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

Finder chart Jishui - ο Geminorum (omicron Geminorum) star
Simplified finder chart for Jishui - ο Geminorum (omicron Geminorum).

Visibility of Jishui 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 Jishui - ο Geminorum (omicron Geminorum) 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: 55.4°
Max altitude: 73.1°
Azimuth: 304.6°

Digitized Sky Survey image of Jishui

The image below is a photograph of Jishui 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 Jishui is -0.037 arcsec per year in Right Ascension and -0.117 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Jishui - ο Geminorum (omicron Geminorum) star
DSS2 image of Jishui. The red arrow shows the motion of Jishui during the next 1000 years (-0.62 arcmin in Right Ascension and -1.95 arcmin in declination);

Distance of Jishui from the Sun and relative movement

Jishui is distant 158.10 light years from the Sun and it is moving far from the Sun at the speed of 7 kilometers per second.

48.50 pc
158.10 ly
7 km/s
-0.037 arcsec/year
-0.117 arcsec/year

Spectral properties of Jishui

Jishui belongs to spectral class F3 and has a luminosity class of III corresponding to a giant star.


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

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

Alternative designations of Jishui

ο Geminorum
(omicron Geminorum)
71 Geminorum