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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: 7:03  
clear_day Transit: 12:12  
SunsetSet: 17:22
wb_twilight Astronomical TwilightWhat's Visible Now?
All Constellations » Orion » 

HR1684

Altitude: 54.6°   Azimuth: 182.0°   Direction: South

HR1684 is a giant star in the constellation of Orion.

HR1684 visual magnitude is 5.18. Because of its reltive faintness, HR1684 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 HR1684 is 0.005 arcsec per year in Right Ascension and 0.007 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR1684 star
DSS2 image of HR1684. The red arrow shows the motion of HR1684 during the next 100000 years (8.33 arcmin in Right Ascension and 11.67 arcmin in declination);

Key facts about HR1684

5.18
Giant

HR1684 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 54.6°
Azimuth: 182.0°
Direction: South

Celestial coordinates and finder chart of HR1684

HR1684 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 HR1684 are provided in the following table:

05h 11m 41s
+16° 02’ 44”
186.63°
-13.57°
Orion

The simplified sky map below shows the position of HR1684 in the sky:

Finder chart HR1684 star
Simplified finder chart for HR1684.

Visibility of HR1684 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 HR1684 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: 74.0°
Max altitude: 54.6°
Azimuth: 286.0°

Distance of HR1684 from the Sun and relative movement

HR1684 is distant 321.18 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

98.52 pc
321.18 ly
-6 km/s
0.005 arcsec/year
0.007 arcsec/year

Spectral properties of HR1684

HR1684 belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.

0.21
K5III
3809K

The red dot in the diagram below shows where HR1684 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1684. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1684

SAO94377
SAO94377