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 » 

HR3131

Altitude: -34.4°   Azimuth: 284.2°   Direction: West-North-West

HR3131 is a main-sequence star in the constellation of Puppis.

HR3131 visual magnitude is 4.61. Because of its moderate brightness, HR3131 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 HR3131:

4.61
Main-sequence

HR3131 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -34.4°
Azimuth: 284.2°
Direction: West-North-West

Celestial coordinates and finder chart of HR3131

HR3131 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 HR3131 are provided in the following table:

07h 59m 52s
-18° 23’ 57”
237.16°
Puppis

The simplified sky map below shows the position of HR3131 in the sky:

Finder chart HR3131 star
Simplified finder chart for HR3131.

Visibility of HR3131 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 HR3131 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: 108.4°
Max altitude: 20.1°
Azimuth: 251.6°
HR3131 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR3131

The image below is a photograph of HR3131 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 HR3131 is -0.002 arcsec per year in Right Ascension and -0.039 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3131 star
DSS2 image of HR3131. The red arrow shows the motion of HR3131 during the next 10000 years (-0.33 arcmin in Right Ascension and -6.50 arcmin in declination);

Distance of HR3131 from the Sun and relative movement

HR3131 is distant 238.13 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

73.05 pc
238.13 ly
-12 km/s
-0.002 arcsec/year
-0.039 arcsec/year

Spectral properties of HR3131

HR3131 belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.

0.29
A2V
9226K

The red dot in the diagram below shows where HR3131 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR3131. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3131

SAO153687
SAO153687