Your Guide to the Solar System and the Night Sky
Donate now! You'll help cover server costs, enhance the site and keep it ad-free.
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:52  
clear_day Transit: 12:55  
SunsetSet: 20:59 south
sunny DaytimeWhat's Visible Now
Breakng! newly discovered Supernova 2023ixf in the Pinwheel Galaxy is the closest supernova observed in the latest decade. It can become bright enough to be visible by amateur astronomers. Check out information and detailed finder chart.
All Constellations » Puppis » 


HR3099 is a variable giant star in the constellation of Puppis.

HR3099 visual magnitude is 6.33. Because of its reltive faintness, HR3099 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 HR3099:

HR3099 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR3099

HR3099 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 HR3099 are provided in the following table:

07h 56m 22s
-30° 17’ 07”

The simplified sky map below shows the position of HR3099 in the sky:

Finder chart HR3099 star
Simplified finder chart for HR3099.

Visibility of HR3099 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 HR3099 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: 120.3°
Max altitude: 8.2°
Azimuth: 239.7°
HR3099 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR3099

The image below is a photograph of HR3099 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 HR3099 is 0.004 arcsec per year in Right Ascension and -0.032 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3099 star
DSS2 image of HR3099. The red arrow shows the motion of HR3099 during the next 10000 years (0.67 arcmin in Right Ascension and -5.33 arcmin in declination);

Distance of HR3099 from the Sun and relative movement

HR3099 is distant 1,220.97 light years from the Sun and it is moving far from the Sun at the speed of 21 kilometers per second.

374.53 pc
1,220.97 ly
21 km/s
0.004 arcsec/year
-0.032 arcsec/year

Spectral properties of HR3099

HR3099 belongs to spectral class M6 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR3099 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3099. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3099