1 Delphini

Below the horizon. Rise: 20:54 | Tran: 3:52 | Set: 10:47

Alt: -11.08° Az: 56.10° Direction: North-East

1 Delphini is a variable and multiple star of spectral class A1 in the constellation of Delphinus.

1 Delphini visual magnitude is 6.08. Because of its faintness, 1 Delphini 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 1 Delphini. The red arrow shows the motion of 1 Delphini during the next 10000 years (3.50 arcmin in Right Ascension and 0.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 31m 31s

Declination +10° 58’ 57”

Hour Angle 15h 44m 17s

Sidereal Time 12h 15m 48s

J2000

Right Ascension 20h 30m 17s

Declination +10° 53’ 44”

Galactic Coordinates

Galactic Longitude 54.66°

Galactic Latitude -16.21°

Finder Chart

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Finder chart for 1 Delphini.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.08

Class

Absolute magnitude -0.12

Spectral Type A1

Color Index (B-V) -0.03

Temperature 10516K

The red dot in the diagram below shows where 1 Delphini is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 1 Delphini. Attribution: Richard Powell / CC BY-SA

Star System Properties

1 Delphini is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the 1 Delphini double sysyem:

Main star magnitude 6.08

Secondary star magnitude 7.88

Magnitude difference 1.8

Separation 0.9 arcsec

Distance, Radial Speed, Proper Motion

1 Delphini is distant 565.97 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

Distance (parsec) 173.61

Distance (light year) 565.97

Radial Speed -16 km/s

Proper Motion RA 0.021 arcsec/y

Proper Motion Dec 0.003"/y

Alternative Designations

Flamsteed designation 1 Delphini

Henry Draper Catalogue HD195325

SAO Catalogue SAO106172

Hipparcos Catalogue HIP101160

Durchmusterung Catalogue BD+10 4303

General Catalogue of Variable Stars 13114

Aitken Double Star Catalogue ADS13920

Visibility from Your Location

Today's 1 Delphini rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 79.0° RISE 20:54

Max altitude: 49.5° TRANSIT 3:52

Azimuth: 281.0° SET 10:47

Set Location

Other stars in Delphinus