ζ Ophiuchi (zeta Ophiuchi)

Below the horizon. Rise: 15:31 | Tran: 21:19 | Set: 3:07

Alt: -42.55° Az: 92.35° Direction: East

ζ Ophiuchi is a variable main-sequence star of spectral class O9 in the constellation of Ophiuchus.

ζ Ophiuchi visual magnitude is 2.56. Because of its brightness, ζ Ophiuchi is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

Image of ζ Ophiuchi (zeta Ophiuchi) star

DSS2 image of ζ Ophiuchi. The red arrow shows the motion of ζ Ophiuchi during the next 10000 years (2.33 arcmin in Right Ascension and 4.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 16h 38m 33s

Declination -10° 37’ 01”

Hour Angle 15h 13m 59s

Sidereal Time 07h 52m 33s

J2000

Right Ascension 16h 37m 09s

Declination -10° 34’ 01”

Galactic Coordinates

Galactic Longitude 6.28°

Galactic Latitude 23.59°

Finder Chart

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Finder chart for ζ Ophiuchi (zeta Ophiuchi).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 2.56

Class Main-sequence

Absolute magnitude -3.18

Spectral Type O9V

Color Index (B-V) 0.02

Temperature 9882K

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

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

Distance, Radial Speed, Proper Motion

ζ Ophiuchi is distant 457.87 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

Distance (parsec) 140.45

Distance (light year) 457.87

Radial Speed -15 km/s

Proper Motion RA 0.014 arcsec/y

Proper Motion Dec 0.026"/y

Alternative Designations

Bayer designation ζ Ophiuchi
(zeta Ophiuchi)

Flamsteed designation 13 Ophiuchi

Henry Draper Catalogue HD149757

SAO Catalogue SAO160006

Hipparcos Catalogue HIP81377

Durchmusterung Catalogue BD-10 4350

FK5 Catalogue 622

General Catalogue of Variable Stars Zet Oph

Visibility from Your Location

Today's ζ Ophiuchi (zeta Ophiuchi) rise, transit and set times from Aurora, Philippines are the following (all times relative to the local timezone Asia/Manila):

Azimuth: 100.6° RISE 15:31

Max altitude: 66.2° TRANSIT 21:19

Azimuth: 259.4° SET 3:07

Name:	Aurora, Philippines
Latitude:	13° 13' 55.9" N
Longitude:	121° 7' 12.0" E
Timezone:	Asia/Manila

Set Location

Other stars in Ophiuchus