Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:46  
clear_day Transit: 12:56  
SunsetSet: 21:07 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Puppis » 

HR3155

Altitude: -45.0°   Azimuth: 263.6°   Direction: West

HR3155 is a variable giant star in the constellation of Puppis.

HR3155 visual magnitude is 6.34. Because of its reltive faintness, HR3155 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 HR3155:

6.34
Giant

HR3155 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -45.0°
Azimuth: 263.6°
Direction: West

Celestial coordinates and finder chart of HR3155

HR3155 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 HR3155 are provided in the following table:

08h 02m 06s
-37° 03’ 02”
253.31°
-3.39°
Puppis

The simplified sky map below shows the position of HR3155 in the sky:

Finder chart HR3155 star
Simplified finder chart for HR3155.

Visibility of HR3155 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 HR3155 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: 127.1°
Max altitude: 1.5°
Azimuth: 232.9°
HR3155 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR3155

The image below is a photograph of HR3155 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 HR3155 is 0.016 arcsec per year in Right Ascension and -0.003 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3155 star
DSS2 image of HR3155. The red arrow shows the motion of HR3155 during the next 10000 years (2.67 arcmin in Right Ascension and -0.50 arcmin in declination);

Distance of HR3155 from the Sun and relative movement

HR3155 is distant 823.23 light years from the Sun and it is moving far from the Sun at the speed of 59 kilometers per second.

252.53 pc
823.23 ly
59 km/s
0.016 arcsec/year
-0.003 arcsec/year

Spectral properties of HR3155

HR3155 belongs to spectral class M1 and has a luminosity class of III corresponding to a giant star.

-0.67
M1III
3622K

The red dot in the diagram below shows where HR3155 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR3155. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3155

SAO198725
SAO198725