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🌎  Greenwich, United Kingdom [change]


HR1646 is a sub-giant star in the constellation of Orion.

HR1646 visual magnitude is 6.05. Because of its reltive faintness, HR1646 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 HR1646:

HR1646 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 35°.

Celestial coordinates and finder chart of HR1646

HR1646 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 HR1646 are provided in the following table:

05h 04m 54s
-03° 02’ 22”

The simplified sky map below shows the position of HR1646 in the sky:

Finder chart HR1646 star
Simplified finder chart for HR1646.

Visibility of HR1646 from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's HR1646 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 93.0°
Max altitude: 35.5°
Azimuth: 267.0°
HR1646 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR1646

The image below is a photograph of HR1646 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 HR1646 is 0.001 arcsec per year in Right Ascension and -0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR1646 star
DSS2 image of HR1646. The red arrow shows the motion of HR1646 during the next 100000 years (1.67 arcmin in Right Ascension and -1.67 arcmin in declination);

Distance of HR1646 from the Sun and relative movement

HR1646 is distant 3,075.47 light years from the Sun and it is moving far from the Sun at the speed of 27 kilometers per second.

943.40 pc
3,075.47 ly
27 km/s
0.001 arcsec/year
-0.001 arcsec/year

Spectral properties of HR1646

HR1646 belongs to spectral class B5 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR1646 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1646. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1646