6 Lacertae

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title: "6 Lacertae" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["b-type-subgiants", "spectroscopic-binaries", "lacerta", "durchmusterung-objects", "flamsteed-objects", "henry-draper-catalogue-objects", "hipparcos-objects", "bright-star-catalogue-objects"] description: "Star in the constellation Lacerta" topic_path: "general/b-type-subgiants" source: "https://en.wikipedia.org/wiki/6_Lacertae" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Star in the constellation Lacerta ::

| image = |image=Lacerta constellation map.svg|alt=|float=center|width=240 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=6 Lacertae |x=490|y=835 | caption = Location of 6 Lacertae (circled in red) | epoch = J2000 | constell = Lacerta | ra = | dec = | appmag_v = 4.52 | type = | class = B2 IV | b-v = | u-b = | variable = | radial_v = | prop_mo_ra = −4.800 | prop_mo_dec = −2.598 | parallax = 1.7577 | p_error = 0.2697 | parallax_footnote = | absmag_v = −2.62 | reference = | period_unitless = 880 days | eccentricity = 0.30 | periastron = | periarg = 190 | k1 = 9 | source = | mass = | radius = 6.9 | luminosity_bolometric = 34,590 | temperature = 21,150 | gravity = 3.56 | metal_fe = −0.04 | rotational_velocity = 70 | age_myr = | names = | Simbad = 6+Lac

6 Lacertae is a binary star system in the northern constellation of Lacerta, located around 1,900 light years from the Sun. It is visible to the naked eye as a dim, blue-white hued star with a combined apparent visual magnitude of 4.52. The system is moving closer to the Earth with a heliocentric radial velocity of −9 km/s, and is a suspected member of the Lac OB1 association.

This system forms a single-lined spectroscopic binary with an orbital period of 880 days and an eccentricity of 0.3. The visible component has a stellar classification of B2 IV, matching a B-type subgiant star. It is about 16 million years old with a relatively high projected rotational velocity of 70 km/s. The star has 12.5 times the mass of the Sun and about 7 times the Sun's radius. It is radiating a net 34,590 times the Sun's luminosity from its photosphere at an effective temperature of .

References

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References

1. "6 Lac".
2. {{cite DR2. 1999776222304976384

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