HD 201298
Star in the constellation Equuleus
title: "HD 201298" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["equuleus", "m-type-giants", "henry-draper-catalogue-objects", "bright-star-catalogue-objects", "gould-objects", "hipparcos-objects", "durchmusterung-objects"] description: "Star in the constellation Equuleus" topic_path: "general/equuleus" source: "https://en.wikipedia.org/wiki/HD_201298" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Star in the constellation Equuleus ::
|image=Equuleus constellation map.svg|alt=|float=center|width=260
|label=|position=right
|mark=Red circle.svg|mark_width=12|mark_link=α Equ
|x=580|y=660
|epoch = J2000
|constell = Equuleus
|ra =
|dec =
|appmag_v = 6.14
| type = red giant branch?
|class = M0 III
|b-v = +1.66
|u-b = +1.97
|radial_v = 20 ± 2
|prop_mo_ra = −10.643
|prop_mo_dec = +2.479
|parallax = 2.8646
|parallax_footnote =
|p_error = 0.0533
|pm_footnote =
|absmag_v = −0.39
|mass = 1.83
|radius = 117
|luminosity = 1,648
|temperature = 3,732
|metal_fe =
|gravity = 0.413
|rotational_velocity = 4.5 ± 1
|names =
| Simbad = HR+8090
HD 201298 (HR 8090) is a solitary star located in the northern constellation Equuleus just next to 3 Equulei It has an apparent magnitude of 6.14, making it barely visible to the naked eye under ideal conditions. The star is situated at a distance of 1,140 light years but is drifting away with a heliocentric radial velocity of .
HD 201298 has a stellar classification of M0 III, indicating that it is ageing M-type star that is probably on the red giant branch. As a result, it has expanded to 117 times the Sun's girth. At present it has 1.83 times the mass of the Sun and shines with a luminosity of from its enlarged photosphere at an effective temperature of 3,732 K, which gives it an orange glow. HD 201298 spins leisurely with a projected rotational velocity of , slightly faster than most giants.
References
References
- {{Cite Gaia DR3. 1736869591794264960
- (September 2000). "Photometric Variability in a Sample of 187 G and K Giants". The Astrophysical Journal Supplement Series.
- {{cite XHIP. 104357
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- (1 January 1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory.
- (1953). "General catalogue of stellar radial velocities.". Carnegie Institute Washington D.C. Publication.
- (November 1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series.
- (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society.
- (October 2011). "The red giant branch in the Tycho-2 catalogue". Astronomy Letters.
- (2017). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society.
- (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics.
- Gould, Benjamin Apthorp. (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino.
- "HD 201298".
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