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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: 6:04  
clear_day Transit: 12:06  
SunsetSet: 18:09
sunny DaytimeWhat's Visible Now?
All Constellations » Orion » 

HR1685

Altitude: -3.4°   Azimuth: 89.4°   Direction: East

HR1685 is a sub-giant star in the constellation of Orion.

HR1685 visual magnitude is 6.25. Because of its reltive faintness, HR1685 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR1685 is 0.075 arcsec per year in Right Ascension and -0.145 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR1685 star
DSS2 image of HR1685. The red arrow shows the motion of HR1685 during the next 1000 years (1.25 arcmin in Right Ascension and -2.42 arcmin in declination);

Key facts about HR1685

6.25
Sub-giant

HR1685 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -3.4°
Azimuth: 89.4°
Direction: East

Celestial coordinates and finder chart of HR1685

HR1685 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 HR1685 are provided in the following table:

05h 10m 58s
-02° 15’ 14”
203°
-23.29°
Orion

The simplified sky map below shows the position of HR1685 in the sky:

Finder chart HR1685 star
Simplified finder chart for HR1685.

Visibility of HR1685 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 HR1685 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: 36.3°
Azimuth: 267.7°

Distance of HR1685 from the Sun and relative movement

HR1685 is distant 157.79 light years from the Sun and it is moving far from the Sun at the speed of 64 kilometers per second.

48.40 pc
157.79 ly
64 km/s
0.075 arcsec/year
-0.145 arcsec/year

Spectral properties of HR1685

HR1685 belongs to spectral class K1 and has a luminosity class of IV corresponding to a sub-giant star.

2.83
K1IV
4791K

The red dot in the diagram below shows where HR1685 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1685. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1685

SAO131847
SAO131847