HR1685

Altitude: 10.5° Azimuth: 252.7° Direction: West-South-West

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 skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR1685:

Color of HR1685 ⬤

Magnitude of HR1685 6.25

Class Sub-giant

VISIBILITY RIGHT NOW

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

Altitude: 10.5°
Azimuth: 252.7°
Direction: West-South-West

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:

Right Ascension J2000 05h 10m 58s

Declination J2000 -02° 15’ 14”

Galactic Longitude 203°

Galactic Latitude -23.29°

Constellation Orion

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

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° RISE 18:26

Max altitude: 36.3° TRANSIT 0:16

Azimuth: 267.7° SET 6:03

Digitized Sky Survey image of HR1685

The image below is a photograph of HR1685 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 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.

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);

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.

Distance (parsec) 48.40 pc

Distance (light year) 157.79 ly

Heliocentric radial velocity 64 km/s

Proper Motion RA 0.075 arcsec/year

Proper Motion Dec -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.

Absolute magnitude 2.83

Spectral Type K1IV

Color Index (B-V) 0.98

Temperature of HR1685 4791K

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

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

Alternative designations of HR1685

Henry Draper Catalogue HD33555

SAO Catalogue SAO131847

Hipparcos Catalogue HIP24130

Durchmusterung Catalogue BD-02 1161

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In Evidence

Other stars in Orion