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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
SunriseRise: 6:59  
clear_day Transit: 12:12  
SunsetSet: 17:25
sunny DaytimeWhat's Visible Now?
All Constellations » Hydra » 


Altitude: 6.1°   Azimuth: 88.9°   Direction: East

HR3649 is a sub-giant star in the constellation of Hydra.

HR3649 visual magnitude is 6.35. Because of its reltive faintness, HR3649 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of HR3649 is -0.101 arcsec per year in Right Ascension and -0.025 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR3649 star
DSS2 image of HR3649. The red arrow shows the motion of HR3649 during the next 1000 years (-1.68 arcmin in Right Ascension and -0.42 arcmin in declination);

Key facts about HR3649


HR3649 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 6.1°
Azimuth: 88.9°
Direction: East

Celestial coordinates and finder chart of HR3649

HR3649 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 HR3649 are provided in the following table:

09h 11m 55s
+05° 28’ 05”

The simplified sky map below shows the position of HR3649 in the sky:

Finder chart HR3649 star
Simplified finder chart for HR3649.

Visibility of HR3649 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 HR3649 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: 84.5°
Max altitude: 44.0°
Azimuth: 275.5°

Distance of HR3649 from the Sun and relative movement

HR3649 is distant 165.90 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

50.89 pc
165.90 ly
3 km/s
-0.101 arcsec/year
-0.025 arcsec/year

Spectral properties of HR3649

HR3649 belongs to spectral class A9 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR3649 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3649. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3649