ι Ophiuchi (iota Ophiuchi)

Below the horizon. Rise: 17:02 | Tran: 22:41 | Set: 4:24

Alt: -50.84° Az: 105.43° Direction: South-South-West

ι Ophiuchi is a variable main-sequence star of spectral class B8 in the constellation of Ophiuchus.

ι Ophiuchi visual magnitude is 4.38. Because of its moderate brightness, ι Ophiuchi is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of ι Ophiuchi (iota Ophiuchi) star

DSS2 image of ι Ophiuchi. The red arrow shows the motion of ι Ophiuchi during the next 10000 years (-8.50 arcmin in Right Ascension and -6.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 16h 55m 12s

Declination +10° 07’ 31”

Hour Angle 14h 32m 46s

Sidereal Time 07h 27m 59s

J2000

Right Ascension 16h 54m 00s

Declination +10° 09’ 55”

Galactic Coordinates

Galactic Longitude 28.73°

Galactic Latitude 30.66°

Finder Chart

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Finder chart for ι Ophiuchi (iota Ophiuchi).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.38

Class Main-sequence

Absolute magnitude 0.10

Spectral Type B8V

Color Index (B-V) -0.08

Temperature 11247K

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

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

Distance, Radial Speed, Proper Motion

ι Ophiuchi is distant 233.69 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.

Distance (parsec) 71.68

Distance (light year) 233.69

Radial Speed -21 km/s

Proper Motion RA -0.051 arcsec/y

Proper Motion Dec -0.036"/y

Alternative Designations

Bayer designation ι Ophiuchi
(iota Ophiuchi)

Flamsteed designation 25 Ophiuchi

Henry Draper Catalogue HD152614

SAO Catalogue SAO102458

Hipparcos Catalogue HIP82673

Durchmusterung Catalogue BD+10 3092

FK5 Catalogue 1442

General Catalogue of Variable Stars 8034

Visibility from Your Location

Today's ι Ophiuchi (iota Ophiuchi) rise, transit and set times from Macia, Mozambique are the following (all times relative to the local timezone Africa/Maputo):

Azimuth: 79.9° RISE 17:02

Max altitude: 54.8° TRANSIT 22:41

Azimuth: 280.1° SET 4:24

Name:	Macia, Mozambique
Latitude:	25° 1' 36.8" S
Longitude:	33° 5' 56.0" E
Timezone:	Africa/Maputo

Set Location

Other stars in Ophiuchus