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public LocationGreenwich, UK
Sunrise: 5:00 
Transit: 13:04 
Sunset: 21:07
wb_twilight   (Civil Twilight)   What's Visible Now?
All Constellations » Hercules » 

99 Herculis

Above the horizon.  Rise: 14:22 | Tran: 23:30 | Set: 8:43
Alt: 59.32°   Az: 121.14°   Direction: East-South-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.

99 Herculis is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere.

Image of 99 Herculis star
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


18h 07m 57s
+30° 33’ 59”
21h 58m 05s
16h 06m 03s


18h 07m 01s
+30° 33’ 42”

Galactic Coordinates


Finder Chart

Finder chart 99 Herculis star
Simplified finder chart for 99 Herculis.

Magnitude, Color, Spectral Class



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

HR 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:

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.

15.65 pc
51.03 ly
1 km/s
-0.094 arcsec/y
0.071 "/y

Alternative Designations

99 Herculis
Gl 704 A

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°
Max altitude: 69.1°
Azimuth: 300.6°