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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: 7:47  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sunny DaytimeWhat's Visible Now?
All Constellations » Monoceros » 


Altitude: -16.1°   Azimuth: 287.3°   Direction: West-North-West

HR2521 is a giant star in the constellation of Monoceros.

HR2521 visual magnitude is 5.74. Because of its reltive faintness, HR2521 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 HR2521:


HR2521 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -16.1°
Azimuth: 287.3°
Direction: West-North-West

Celestial coordinates and finder chart of HR2521

HR2521 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 HR2521 are provided in the following table:

06h 49m 16s
-02° 16’ 18”

The simplified sky map below shows the position of HR2521 in the sky:

Finder chart HR2521 star
Simplified finder chart for HR2521.

Visibility of HR2521 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 HR2521 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: 92.3°
Max altitude: 36.2°
Azimuth: 267.7°

Digitized Sky Survey image of HR2521

The image below is a photograph of HR2521 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 HR2521 is -0.009 arcsec per year in Right Ascension and -0.004 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR2521 star
DSS2 image of HR2521. The red arrow shows the motion of HR2521 during the next 100000 years (-15.00 arcmin in Right Ascension and -6.67 arcmin in declination);

Distance of HR2521 from the Sun and relative movement

HR2521 is distant 558.22 light years from the Sun and it is moving far from the Sun at the speed of 10 kilometers per second.

171.23 pc
558.22 ly
10 km/s
-0.009 arcsec/year
-0.004 arcsec/year

Spectral properties of HR2521

HR2521 belongs to spectral class B8 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR2521 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR2521. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR2521