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Nearby stars catalogue

YY Herculis

Star YY Herculis

Red giant YY Herculis is located 26852 light years away from the Sun. It is a single star of spectral class M4.0III D, that has typically about 120 % of solar mass. For now, there are no known exoplanets in this star system.

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Nearby stars catalogue

Sun distance
26852 light years

YY Herculis

Red giant

Spectral class: M4.0III D

Location +

Right ascension: 18h 14m 34.196s

Declination: 20° 59' 21.195'' (northern hemisphere)

Parallax: 0.121

Sun distance: 26,852.270 ly | 8,233.0 pc

Photometry

Apparent magnitude (V): 11.1

Absolute magnitude (V): 11.1

Absolute stellar magnitude in different parts of the electromagnetic spectrum from infrared (K band) to ultraviolet (U band).

K
2.1

H
1.6

J
1.2

Grp
0.8

I
0.8

G
0.6

V
0.5

Gbp
0.5

B
0.4

U
0.3

YY Herculis system structure


	YY Herculis

More about YY Herculis

       YY Herculis can be found in northern celestial hemisphere, however it is too dim to be seen with the naked eye or even a small telescope.

Other designations of this star
TIC 329668061, WISEA J181434.18+205921.2, JP11 5444, 2MASS J18143419+2059213, Gaia DR3 4528063078197198848

External sources

The 2021 hot-type symbiotic outburst of YY Herculis: an optical follow-up study

Scientific study, Accepted: 20. 02. 2026

Gaia database (Gaia DR3 4528063078197198848)

Archive from the Gaia mission

News from this star system

YY Herculis outburst reveals phase-dependent changes in temperature and brightness

1. 3. 2026

Image: YY Herculis outburst reveals phase-dependent changes in temperature and brightness

YY Herculis showed a hot-type outburst in 2021, with temperature and brightness changes depending on orbital phase. Both hot- and cool-type events were observed, and the ellipsoidal effect was confirmed. Study covers 1.5 cycles. #space #science #spacenews...

Read article

Frequently Asked Questions

How far is the YY Herculis system from the Sun?

The YY Herculis system is 26852 light years or 8,233.0 parsecs from the Sun.

What galaxy is the YY Herculis star in?

The YY Herculis is in the Milky Way galaxy just like the Sun.

How many stars are in the YY Herculis system?

The YY Herculis is a single star, there are no other known stars in the system.

What type of star is the YY Herculis?

The star YY Herculis is a Red giant star.

What temperature is the YY Herculis?

The primary in the YY Herculis system has an effective temperature of K ( °C). Find out more about the temperature of stars in Stellar guide

Class of stars Red giant

White dwarfs are the hot, extremely dense stellar remnants left behind by stars that originally had masses between about 0.5 and 8 times the mass of the Sun during their main sequence lifetimes. After exhausting their nuclear fuel, these stars shed their outer layers and leave behind a compact core. Although white dwarfs contain between roughly 0.2 and 1.44 solar masses, this mass is packed into a volume comparable to that of an Earth-sized planet, making them some of the densest objects in the Universe.

About Stellar Catalog

Working with real data

Data in Stellar Catalog come from trusted scientific sources. Primary source is Gaia space telescope mapping the stars in Milky Way. Other sources include research papers, Simbad catalog and Exoplanet.eu database.

Estimated values

Objects listed in the Stellar Catalog often have values that are estimates. These estimates are determined using their known characteristics, such as spectral type, brightness across different wavelengths, distance from a star, and other factors.

Fresh and validated

Stellar Catalog is continuously updated with new information from research papers. Stellar and planetary data are validated by automatic processes as well as humans.