HR18

Above the horizon. Rise: 4:43 | Tran: 9:09 | Set: 13:34

Alt: 11.36° Az: 137.99° Direction: South-East

HR18 is a variable hypergiant star of spectral class M0 in the constellation of Cetus.

HR18 visual magnitude is 6.06. Because of its faintness, HR18 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 HR18. The red arrow shows the motion of HR18 during the next 10000 years (0.00 arcmin in Right Ascension and -4.17 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 00h 09m 51s

Declination -17° 26’ 10”

Hour Angle 21h 06m 12s

Sidereal Time 21h 16m 03s

J2000

Right Ascension 00h 08m 33s

Declination -17° 34’ 39”

Galactic Coordinates

Galactic Longitude 74.69°

Galactic Latitude -76.25°

Finder Chart

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Finder chart for HR18.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.06

Class Hypergiant

Absolute magnitude -2.02

Spectral Type M0III

Color Index (B-V) 1.67

Temperature 3555K

The red dot in the diagram below shows where HR18 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR18. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR18 is distant 1,347.11 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

Distance (parsec) 413.22

Distance (light year) 1,347.11

Radial Speed -17 km/s

Proper Motion Dec -0.025"/y

Alternative Designations

Henry Draper Catalogue HD402

SAO Catalogue SAO147103

Hipparcos Catalogue HIP696

Durchmusterung Catalogue BD-18 3

General Catalogue of Variable Stars 51

Visibility from Your Location

Today's HR18 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 107.4° RISE 4:43

Max altitude: 21.1° TRANSIT 9:09

Azimuth: 252.6° SET 13:34

Set Location

Other stars in Cetus