19 Ophiuchi

Above the horizon. Rise: 12:07 | Tran: 18:15 | Set: 0:23

Alt: 16.31° Az: 252.02° Direction: West-South-West

19 Ophiuchi is a variable and multiple main-sequence star of spectral class A3 in the constellation of Ophiuchus.

19 Ophiuchi visual magnitude is 6.1. Because of its faintness, 19 Ophiuchi is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of 19 Ophiuchi. The red arrow shows the motion of 19 Ophiuchi during the next 10000 years (-1.67 arcmin in Right Ascension and -2.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 16h 48m 24s

Declination +02° 01’ 18”

Hour Angle 04h 23m 57s

Sideral Time 21h 12m 22s

J2000

Right Ascension 16h 47m 09s

Declination +02° 03’ 51”

Galactic Coordinates

Galactic Longitude 19.58°

Galactic Latitude 28.39°

Finder Chart

Simplified finder chart for 19 Ophiuchi.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.1

Class Main-sequence

Absolute magnitude 0.20

Spectral Type A3V

Color Index (B-V) 0.14

Temperature 8658K

The red dot in the diagram below shows where 19 Ophiuchi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 19 Ophiuchi. Attribution: Richard Powell / CC BY-SA

Star System Properties

19 Ophiuchi is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 19 Ophiuchi double sysyem:

Main star magnitude 6.1

Secondary star magnitude 9.7

Magnitude difference 3.6

Separation 23.4 arcsec

Distance, Radial Speed, Proper Motion

19 Ophiuchi is distant 492.45 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

Distance (parsec) 151.06

Distance (light year) 492.45

Radial Speed -6 km/s

Proper Motion RA -0.01 arcsec/y

Proper Motion Dec -0.014"/y

Alternative Designations

Flamsteed designation 19 Ophiuchi

Henry Draper Catalogue HD151431

SAO Catalogue SAO121859

Hipparcos Catalogue HIP82162

Durchmusterung Catalogue BD+02 3175

FK5 Catalogue 1436

General Catalogue of Variable Stars 7962

Aitken Double Star Catalogue ADS10207

Visibility from Your Location

Today's 19 Ophiuchi rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 88.0° RISE 12:07

Max altitude: 40.5° TRANSIT 18:15

Azimuth: 272.0° SET 0:23

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Ophiuchus