Mothallah - α Trianguli (alpha Trianguli)

Above the horizon. Rise: 2:47 | Tran: 9:05 | Set: 15:20

Alt: 2.66° Az: 60.39° Direction: East-North-East

Mothallah, also designated as α Trianguli (alpha Trianguli), is a multiple sub-giant star of spectral class F6 in the constellation of Triangulum.

Mothallah visual magnitude is 3.41. Because of its moderate brightness, Mothallah 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 Mothallah - α Trianguli (alpha Trianguli) star

DSS2 image of Mothallah. The red arrow shows the motion of Mothallah during the next 1000 years (0.18 arcmin in Right Ascension and -3.92 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 01h 54m 32s

Declination +29° 42’ 12”

Hour Angle 17h 55m 30s

Sidereal Time 19h 50m 03s

J2000

Right Ascension 01h 53m 04s

Declination +29° 34’ 44”

Galactic Coordinates

Galactic Longitude 138.64°

Galactic Latitude -31.4°

Finder Chart

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Finder chart for Mothallah - α Trianguli (alpha Trianguli).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.41

Class Sub-giant

Absolute magnitude 1.94

Spectral Type F6IV

Color Index (B-V) 0.49

Temperature 6435K

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

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

Star System Properties

Mothallah is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Mothallah double sysyem:

Main star magnitude 3.41

Secondary star magnitude 12.01

Magnitude difference 8.6

Separation 222.3 arcsec

Distance, Radial Speed, Proper Motion

Mothallah is distant 64.08 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

Distance (parsec) 19.66

Distance (light year) 64.08

Radial Speed -13 km/s

Proper Motion RA 0.011 arcsec/y

Proper Motion Dec -0.235"/y

Alternative Designations

Proper Name Mothallah

Bayer designation α Trianguli
(alpha Trianguli)

Flamsteed designation 2 Trianguli

Henry Draper Catalogue HD11443

SAO Catalogue SAO74996

Hipparcos Catalogue HIP8796

Durchmusterung Catalogue BD+28 312

Gliese Catalogue Gl 78.1

FK5 Catalogue 64

Visibility from Your Location

Today's Mothallah - α Trianguli (alpha Trianguli) rise, transit and set times from Koror, Palau are the following (all times relative to the local timezone Pacific/Palau):

Azimuth: 60.3° RISE 2:47

Max altitude: 67.6° TRANSIT 9:05

Azimuth: 299.7° SET 15:20

Name:	Koror, Palau
Latitude:	7° 20' 23.2" N
Longitude:	134° 28' 22.8" E
Timezone:	Pacific/Palau

Set Location

Other stars in Triangulum