HD 13189

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title: "HD 13189" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["henry-draper-catalogue-objects", "hipparcos-objects", "triangulum", "k-type-bright-giants", "brown-dwarfs", "durchmusterung-objects", "k-type-giants", "planetary-systems-with-one-confirmed-planet"] description: "Orange-hued star in the constellation Triangulum" topic_path: "general/henry-draper-catalogue-objects" source: "https://en.wikipedia.org/wiki/HD_13189" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Orange-hued star in the constellation Triangulum ::

::data[format=table title="Infobox planet"]

Field	Value
name	HD 13189 b
	image
caption	HD 13189 b as rendered in Celestia
discoverer	Hatzes et al.
discovery_site	Tautenburg, Germany
discovered	2005
discovery_method	Radial Velocity
	apsis
semimajor	1.85 ±
eccentricity	0.28 ± 0.06
period	471.6 ± 6 d
time_periastron	2452327.9 ± 20.2
arg_peri	160.7 ± 12
semi-amplitude	6.8 ± 1.5
	mass
::

| epoch = J2000.0 | constell = Triangulum | ra = | dec = | appmag_v = +7.57 | class = K1II-III | b-v = 1.465 | u-b = | variable = | radial_v = 25.39 | prop_mo_ra = 2.306 | prop_mo_dec = 4.935 | pm_footnote = | parallax = 2.0450 | p_error = 0.0240 | parallax_footnote = | absmag_v = −0.3 | mass = 1.2 | radius = 38 | luminosity = 503 | temperature = 4,035 | metal_fe = −0.18 | gravity = 1.21 | age_gyr = 4.4 | names = | Simbad = HD+13189

HD 13189 is a star in the northern constellation of Triangulum constellation. With an apparent visual magnitude of +7.57, it is too faint to be visible to the normal human eye. The distance to this system is approximately 1,590 light years based on parallax measurements, and it is drifting further away with a radial velocity of 25.39 km/s. In 2005, a planetary companion or brown dwarf was announced in orbit around this star.

It has a spectral classification of K1II-III, making it a giant star that has evolved away from the main sequence after exhausting the hydrogen at its core. The mass is 1.2 times the Sun's, while measurements of the star's radius give estimates of . The atmosphere of the star displays short period radial velocity variations with a primary period of 4.89 days. This behavior is typical for giant K-type stars such as this and it is not the result of a close-orbit planetary companion.

HD 13189 b

| name = HD 13189 b | image = HD 13189 b planet.png | caption = HD 13189 b as rendered in Celestia | discoverer = Hatzes et al. | discovery_site = Tautenburg, Germany | discovered = 2005 | discovery_method = Radial Velocity | apsis = astron | semimajor = 1.85 ± | eccentricity = 0.28 ± 0.06 | period = 471.6 ± 6 d | time_periastron = 2452327.9 ± 20.2 | arg_peri = 160.7 ± 12 | semi-amplitude = 6.8 ± 1.5 | mass = 14 ± 6 HD 13189 b is an exoplanet or brown dwarf with mass ranges from 8 to 20 Jupiter mass. This object is located at a mean distance of 277 million km (1.85 AU) from the star, taking 472 days to make one elliptical orbit.

This object was discovered in Tautenburg, Germany in 2005.

References

References

1. [http://austral.as.utexas.edu/planets/hd13189/hd13189.html A Giant Planet Around The Massive Giant Star HD 13189 ] {{webarchive. link. (2015-07-20)
2. (2011). "The red giant branch in the Tycho-2 catalogue". Astronomy Letters.
3. (2016). "Evolved stars and the origin of abundance trends in planet hosts". Astronomy and Astrophysics.
4. (2017). "Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes". The Astronomical Journal.
5. (2022). "VizieR Online Data Catalog: StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)". Vizier Online Data Catalog.
6. (May 2011). "A likely exoplanet orbiting the oscillating K-giant α Arietis". Astronomy & Astrophysics.
7. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics.
8. (2005). "A giant planet around the massive giant star HD 13189". [[Astronomy and Astrophysics]].
9. "HD 13189 -- Star". SIMBAD.
10. (October 2008). "Stellar oscillations in planet-hosting giant stars". Journal of Physics: Conference Series.
11. {{Cite Gaia DR3. 325494788018024576
12. {{cite XHIP. 10085

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