99 Herculis

Above the horizon. Rise: 23:05 | Tran: 8:17 | Set: 17:26

Alt: 40.44° Az: 89.87° Direction: East

99 Herculis is a multiple main-sequence star of spectral class F7 in the constellation of Hercules.

99 Herculis visual magnitude is 5.04. Because of its faintness, 99 Herculis 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 99 Herculis. The red arrow shows the motion of 99 Herculis during the next 1000 years (-1.57 arcmin in Right Ascension and 1.18 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 18h 07m 58s

Declination +30° 33’ 59”

Hour Angle 19h 51m 31s

Sidereal Time 13h 59m 30s

J2000

Right Ascension 18h 07m 01s

Declination +30° 33’ 42”

Galactic Coordinates

Galactic Longitude 56.97°

Galactic Latitude 22.3°

Finder Chart

Loading map...

Finder chart for 99 Herculis.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.04

Class Main-sequence

Absolute magnitude 4.07

Spectral Type F7V

Color Index (B-V) 0.52

Temperature 6300K

The red dot in the diagram below shows where 99 Herculis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 99 Herculis. Attribution: Richard Powell / CC BY-SA

Star System Properties

99 Herculis is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the 99 Herculis double sysyem:

Main star magnitude 5.04

Secondary star magnitude 8.44

Magnitude difference 3.4

Separation 1.7 arcsec

Distance, Radial Speed, Proper Motion

99 Herculis is distant 51.03 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

Distance (parsec) 15.65

Distance (light year) 51.03

Radial Speed 1 km/s

Proper Motion RA -0.094 arcsec/y

Proper Motion Dec 0.071"/y

Alternative Designations

Flamsteed designation 99 Herculis

Henry Draper Catalogue HD165908

SAO Catalogue SAO66648

Hipparcos Catalogue HIP88745

Durchmusterung Catalogue BD+30 3128

Gliese Catalogue Gl 704 A

Aitken Double Star Catalogue ADS11077

Visibility from Your Location

Today's 99 Herculis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 59.4° RISE 23:05

Max altitude: 69.1° TRANSIT 8:17

Azimuth: 300.6° SET 17:26

Set Location

Other stars in Hercules