HD 201507

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High proper motion star in the constellation Equuleus

title: "HD 201507" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["equuleus", "f-type-subgiants", "durchmusterung-objects", "henry-draper-catalogue-objects", "bright-star-catalogue-objects", "gould-objects", "hipparcos-objects"] description: "High proper motion star in the constellation Equuleus" topic_path: "general/equuleus" source: "https://en.wikipedia.org/wiki/HD_201507" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary High proper motion star in the constellation Equuleus ::

| name = HD 201507 | image = {{Location mark | width = 260 | image = Equuleus constellation map.svg | float = center |position = right | mark = Red circle.svg | mark_width = 8 | mark_link = HD 201507 | x = 524 | y = 820 | caption = Location of HD 201507 (circled) | epoch = J2000.0 (ICRS) | constell = Equuleus | ra = | dec = | appmag_v = 6.43 | type = subgiant | class = F5 IV | b-v = +0.37 | u-b = +0.06 | radial_v = −42.8 | prop_mo_ra = +48.902 | prop_mo_dec = +10.883 | parallax = 15.2530 | parallax_footnote = | p_error = 0.3122 | pm_footnote = | absmag_v = +2.12 | mass = 1.45 | radius = 2.2 | luminosity = | temperature = 6,846 | metal_fe = +0.09 | gravity = 3.91 | rotational_velocity= 16.4 | age_gyr = 1.21 |names = |Simbad=HR+8095

HD 201507, also designated HR 8095, is a white-hued star located in the equatorial constellation Equuleus. It has an apparent magnitude of 6.43, placing it near the limit for naked eye visibility. Parallax measurements place the object at a distance of 214 light years and it is currently drifting closer with a heliocentric radial velocity of .

There have been disagreements in classifying the star's spectrum. Eugene A. Harlan found a spectral classification of F5 IV, indicating that it is a F-type subgiant that is evolving towards the red giant branch. On the other hand, Nancy Houk and Carrie Swift (1999) found a class of F2 V, indicating that it is still on the main sequence.

HD 201507 has 1.45 times the mass of the Sun and a slightly enlarged radius of due to its evolved state. It shines with a luminosity of about from its photosphere at an effective temperature of 6,846 K. HD 201507 is slightly metal enriched, with a metallicity 123% that of the Sun. This star has a modest projected rotational velocity of and is estimated to be 1.21 billion years old, only a quarter the age of the Sun.

References

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(November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters.
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(2003). "On the link between rotation, chromospheric activity and Li abundance in subgiant stars". Astronomy and Astrophysics.

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::