25 Scorpii

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title: "25 Scorpii" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["k-type-bright-giants", "scorpius–centaurus-association", "scorpius", "flamsteed-objects", "durchmusterung-objects", "henry-draper-catalogue-objects", "hipparcos-objects", "bright-star-catalogue-objects"] description: "Star in the constellation Scorpius" topic_path: "general/k-type-bright-giants" source: "https://en.wikipedia.org/wiki/25_Scorpii" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Star in the constellation Scorpius ::

|epoch=J2000 |constell=Scorpius |ra= |dec= |appmag_v=6.71 |class=K0 II |b-v=+1.18 |v-i=+1.13 |variable= |radial_v= |prop_mo_ra=−4.165 |prop_mo_dec=−15.630 |parallax=3.5599 |p_error=0.0433 |parallax_footnote= |absmag_v=0.09 |source= |mass= |radius= |temperature= |luminosity=135 |gravity= |metal_fe= |names= |Simbad=25+Sco 25 Scorpii (abbreviated to 25 Sco) is a star in the zodiac constellation of Scorpius, located about 920 light years away from the Sun. Its apparent magnitude is 6.71, so its apparent brightness is at the limit of human eyesight and can only be seen under excellent conditions, according to the Bortle scale. The object is moving closer to the Earth with a heliocentric radial velocity of −1.3 km/s. It is a proposed member of the Scorpius–Centaurus association.{{cite journal | title=New members of the TW Hydrae Association and two accreting M-dwarfs in Scorpius–Centaurus | display-authors=1 | last1=Murphy | first1=Simon J. | last2=Lawson | first2=Warrick A. | last3=Bento | first3=Joao | journal=Monthly Notices of the Royal Astronomical Society | volume=453 | issue=3 | pages=2220–2231 | date=November 2015 | doi=10.1093/mnras/stv1745 | doi-access=free | bibcode=2015MNRAS.453.2220M | arxiv=1507.08002 }}

This is an evolved bright giant with a spectral type of K0 II. It is about two times more massive and over twelve times wider than the Sun. The star is radiating 135 times the Sun's luminosity from its photosphere at an effective temperature of about 4,700 K.

References

References

1. {{cite DR2. 6046673113599431552
2. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey.
3. Corben, P. M.. (1971). "Photoelectric Magnitudes and Colours for Bright Southern Stars". Monthly Notes of the Astron. Soc. Southern Africa.
4. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters.
5. (2016). "The K2 Ecliptic Plane Input Catalog (EPIC) and Stellar Classifications of 138,600 Targets in Campaigns 1-8". The Astrophysical Journal Supplement Series.
6. (2003). "Formation scenarios for the young stellar associations between galactic longitudes ''l'' = 280°–360°". Astronomy & Astrophysics.

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