9 Vulpeculae

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title: "9 Vulpeculae" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["b-type-giants", "suspected-variables", "vulpecula", "durchmusterung-objects", "flamsteed-objects", "henry-draper-catalogue-objects", "hipparcos-objects", "bright-star-catalogue-objects"] description: "Star in the constellation Vulpecula" topic_path: "general/b-type-giants" source: "https://en.wikipedia.org/wiki/9_Vulpeculae" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Star in the constellation Vulpecula ::

| name = 9 Vulpeculae |image= |image=Vulpecula constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=9 Vulpeculae |x=742|y=530 |caption=Location of 9 Vulpeculae (circled) | epoch = J2000 | constell = Vulpecula | ra = | dec = | appmag_v = (4.99 - 5.08) | class = B8 IIIn | appmag_1_passband = U | appmag_1 = | appmag_2_passband = B | appmag_2 = | variable = suspected | radial_v = +5.00 | prop_mo_ra = +13.148 | prop_mo_dec = +5.142 | parallax = 5.8317 | p_error = 0.1242 | parallax_footnote = | absmag_v = −1.14 | mass = 3.5 | temperature = 12,042 | luminosity = 216 | rotational_velocity = 185 | radius = 2.8 | gravity = 3,54 | metal_fe = −0.03 | age_myr = 185 | names = | Simbad = 9+Vulpeculae

9 Vulpeculae is a star in the northern constellation of Vulpecula, located about 560 light years away based on parallax. It is visible to the naked eye as a faint, blue-white hued star with a baseline apparent visual magnitude of 5.01. The star is moving further from the Earth with a heliocentric radial velocity of +5 km/s.

This a B-type star with a stellar classification of B8 IIIn,

9 Vulpeculae has two reported companions: component B, with a separation of 9.3" and magnitude 13.4, and C, with a separation of 108" and a magnitude of 12.5". Both are unrelated background objects.

References

References

1. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters.
2. {{cite Gaia DR3. 1825528467088509952
3. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters.
4. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics.
5. (September 2018). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal.
6. (2002). "Rotational Velocities of B Stars". The Astrophysical Journal.
7. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters.
8. "9 Vul".
9. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S.
10. (2002). "VizieR Online Data Catalog: CCDM (Catalog of Components of Double & Multiple stars) (Dommanget+ 2002)". VizieR On-line Data Catalog: I/274. Originally Published in: Observations et Travaux 54.
11. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal.
12. {{cite Gaia DR3. 1825528471386295936
13. {{cite Gaia DR3. 1825529296049624064
14. (2020). "A new study of the spectroscopic binary 7 Vul with a Be star primary". Astronomy and Astrophysics.

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