Nu Caeli

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title: "Nu Caeli" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["f-type-main-sequence-stars", "f-type-subgiants", "f-type-giants", "caelum", "bayer-objects", "bright-star-catalogue-objects", "durchmusterung-objects", "henry-draper-catalogue-objects", "hipparcos-objects"] description: "Star in the constellation Caelum" topic_path: "science/astronomy" source: "https://en.wikipedia.org/wiki/Nu_Caeli" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Star in the constellation Caelum ::

| name = ν Caeli | image= |image=Caelum constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=ν Caeli |x=482|y=566 |caption=Location of ν Caeli (circled) | epoch = J2000.0 | equinox = J2000.0 (ICRS) | constell = Caelum | ra = | dec = | appmag_v = 6.07 | class = F2/3 V or F1 III-IV | b-v = +0.37 | u-b = | variable = | radial_v = | prop_mo_ra = −3.846 | prop_mo_dec = +66.201 | pm_footnote = | parallax = 20.2691 | p_error = 0.0215 | parallax_footnote = | absmag_v = +2.46 | source = | mass = 1.34 | radius = 2.107 | luminosity = 8.011 | temperature = 6,696 | gravity = | metal_fe = −0.11 | rotational_velocity = 44.9 | age_myr = 880 | names = | Simbad = HD+30985 Nu Caeli is a yellow-white hued star in the constellation Caelum. Its name is a Bayer designation that is Latinized from ν Caeli, and abbreviated Nu Cae or ν Cae. This star has an apparent visual magnitude of 6.07, which indicates it is near the lower limit of brightness that is visible to the naked eye. According to the Bortle scale, the star can be viewed from dark suburban skies. Based upon an annual parallax shift of as seen from Earth, it is located 161 ly from the Sun. The star is drifting further away with a line of sight velocity of +24 km/s.

Houk (1978) listed a stellar classification of F2/3 V for Nu Caeli, which would indicate this is an F-type main-sequence star. In contrast, Malaroda (1975) assigned it to class F1 III-IV, which would suggest it is a more evolved F-type subgiant/giant transitional object. It is an estimated 880 million years old and has a high rate of spin, showing a projected rotational velocity of 45 km/s. This star has 1.34 times the mass of the Sun and 2.1 times the Sun's radius. It is radiating eight times the Sun's luminosity from its photosphere at an effective temperature of .

A stellar companion is listed in multiple star catalogues. It is a 10th-magnitude star at an angular separation of about , but is much further away than ν Caeli and thus unrelated.

References

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| last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C. | title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project | journal=Astronomy & Astrophysics | volume=546 | id=A61 | pages=14 | date=October 2012 | doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D | arxiv=1208.3048 | s2cid=59451347 | postscript=. }}

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| last=Malaroda | first=S. | title=Study of the F-type stars. I. MK spectral types | journal=Astronomical Journal | postscript=. | volume=80 | pages=637–641 |date=August 1975 | doi=10.1086/111786 | bibcode=1975AJ.....80..637M | doi-access=free }}

| last=Houk | first=N. | author-link=Nancy Houk | title=Michigan catalogue of two-dimensional spectral types for the HD stars | volume=2 | date=1978 | postscript=. | publisher=Dept. of Astronomy, University of Michigan | bibcode=1978mcts.book.....H }}

| last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | year=1966 | page=99 | bibcode=1966CoLPL...4...99J | postscript=. }}

| title=HD 30985 | accessdate=2017-09-09 | mode=cs2 | postscript=. }}

References

1. {{cite Gaia EDR3. 4815173945347069056
2. {{cite Gaia EDR3. 4815173945347069440
3. (2005). "VizieR Online Data Catalog: Catalog of Stellar Rotational Velocities (Glebocki+ 2005)". VizieR On-line Data Catalog: III/244. Originally Published in: 2005csss...13..571G; 2005yCat.3244....0G.

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