Explore the Universe. Understand Everything In It.
★
Menu
Home Tonight's Sky News
Explore Solar System PlanetsMoons StarsExoplanets GalaxiesBlack Holes NebulaeAsteroids & Comets Constellations Space Exploration Space Industry
Sky Astronomy Calendar Launches
Learn & Tools Start Learning Astrophysics Scale of the Universe Timeline Glossary A–Z People Young Astronomers Top Lists Tools Compare Worlds Ask the Atlas AI Agents API
About About us Methodology Contact

Guided View
New to astronomy? We explain every term as you browse, in plain English. Same pages, with the help built in.

Expert View
You know the sky. Just the content, clean and compact, with no extra explanations. This is the default view.

Interface language
Light mode
13 Cep The Sun (smaller than a dot at this scale)
Surface temperature
5,760 K
Radius
6,665 × the Sun
Luminosity
44,055,486 × the Sun
Spectral type
B8Ibvar
Diagram, not a photograph. Colour from the star’s measured colour index; size from its luminosity and temperature, drawn to one scale with the Sun. Source: HYG stellar database.

Cataloged star · Database record + computed analysis

13 Cep

HIP 108165 · HD 208501

A real star from the HYG catalog in the constellation Cepheus.

Distance: no reliable parallax measured Apparent magnitude 5.74

B-type: blue-white powerhouse

Its spectral type is B8Ibvar: hot (10,000–30,000 °C), luminous and fast-burning: the searchlights of young star regions. From its measured color, its surface temperature is roughly 5,760 K (5,487 °C), an estimate computed from the catalog's color index.

How far away is it?

The catalog lists no reliable parallax for this star, so its distance is honestly unknown. It is one of many stars still awaiting a precise measurement.

How powerful is it?

Its computed luminosity is 44,055,486 times the Sun's output, a genuine searchlight (derived from its brightness and distance).

Can you see it?

At apparent magnitude 5.74, it is a naked-eye star under dark skies, washed out by city lights. It favors northern observers.

Everything above is computed from the catalog’s measured values for this star. Where a value is missing, the statement is omitted rather than guessed.

About this record

Data: the HYG stellar database v4.1 (Hipparcos + Yale + Gliese, CC BY-SA, © David Nash / astronexus). Want the full stories? Our deep star guides cover Sirius, Betelgeuse, Proxima Centauri, Vega and three dozen more. You can also browse the catalog or learn how stars live and die.