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Loading content98 Herculis is a hypergiant in the constellation Hercules (Herculis), lying about 737.9 light-years from Earth.
Class M. Cool red stars. The most common type in the galaxy, ranging from red dwarfs to red giants. Such stars have surface temperatures around 2,400–3,700 K and appear red to the eye.
| Spectral type | M3IIIa+... |
| Luminosity class | Ia+ |
| Apparent magnitude | 4.96 |
| Absolute magnitude | -1.81 |
| Luminosity (Sun = 1) | 463 |
| Colour index (B−V) | 1.656 |
| Distance | 737.9 ly (226.24 pc) |
Values are real catalogue data; fields without a reliable value are omitted, never estimated.
A hypergiant is an exceptionally massive and luminous star, losing mass at a tremendous rate. Hypergiants are extraordinarily rare and short-lived.
Facts on this topic will be cited from these primary and reference sources.
Aggregated, openly-licensed star catalogue combining Hipparcos, the Yale Bright Star Catalogue, and the Gliese Catalogue of Nearby Stars.
High-precision parallax, magnitude, and position for ~118,000 stars.