15 Trianguli

Above the horizon. Rise: 23:30 | Tran: 9:34 | Set: 19:34

Alt: 64.18° Az: 119.51° Direction: South-South-West

15 Trianguli is a variable and double giant star of spectral class M3 in the constellation of Triangulum.

15 Trianguli visual magnitude is 5.35. Because of its faintness, 15 Trianguli 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 15 Trianguli. The red arrow shows the motion of 15 Trianguli during the next 10000 years (5.00 arcmin in Right Ascension and -8.17 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 02h 37m 20s

Declination +34° 47’ 50”

Hour Angle 22h 10m 02s

Sidereal Time 00h 47m 23s

J2000

Right Ascension 02h 35m 46s

Declination +34° 41’ 14”

Galactic Coordinates

Galactic Longitude 146.14°

Galactic Latitude -23.44°

Finder Chart

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Finder chart for 15 Trianguli.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.35

Class Giant

Absolute magnitude -24.65

Spectral Type M3III

Color Index (B-V) 1.66

Temperature 3568K

The red dot in the diagram below shows where 15 Trianguli is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 15 Trianguli. Attribution: Richard Powell / CC BY-SA

Star System Properties

15 Trianguli is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 15 Trianguli double sysyem:

Main star magnitude 5.35

Secondary star magnitude 6.55

Magnitude difference 1.2

Separation 141.3 arcsec

Distance, Radial Speed, Proper Motion

15 Trianguli is distant 32,600,000.00 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

Distance (parsec) 10,000,000.00

Distance (light year) 32,600,000.00

Radial Speed -10 km/s

Proper Motion RA 0.03 arcsec/y

Proper Motion Dec -0.049"/y

Alternative Designations

Flamsteed designation 15 Trianguli

Henry Draper Catalogue HD16058

SAO Catalogue SAO55687

Hipparcos Catalogue HIP12086

Durchmusterung Catalogue BD+34 469

General Catalogue of Variable Stars 866

Visibility from Your Location

Today's 15 Trianguli rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 55.2° RISE 23:30

Max altitude: 73.3° TRANSIT 9:34

Azimuth: 304.8° SET 19:34

Set Location

Other stars in Triangulum