HD 16754
Binary or triple star system in the constellation Eridanus
title: "HD 16754" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["a-type-main-sequence-stars", "m-type-main-sequence-stars", "astrometric-binaries", "triple-star-systems", "eridanus-(constellation)", "bayer-objects", "durchmusterung-objects", "henry-draper-catalogue-objects", "hipparcos-objects", "bright-star-catalogue-objects"] description: "Binary or triple star system in the constellation Eridanus" topic_path: "science/astronomy" source: "https://en.wikipedia.org/wiki/HD_16754" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Binary or triple star system in the constellation Eridanus ::
| image = |image=Eridanus constellation map.svg|alt=|float=center|width=250 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=HD 16754 |x=728|y=868 | caption = Location of HD 16754 (circled in red) | epoch = J2000 | constell = Eridanus | ra = | dec = | appmag_v = +4.74 | type = | class = A1 Vb + M2-5V + ? | b-v = | u-b = | variable = | radial_v = | prop_mo_ra = +88.20 | prop_mo_dec = −17.82 | parallax = 24.7076 | p_error = 0.3930 | parallax_footnote = | absmag_v = +1.76 | component1 = Aa | mass = 1.95 | radius = 1.93 | luminosity = 17.44 | temperature = | metal_fe = −0.06 | gravity = | rotational_velocity = or | age_myr = 212 or 30 | names = | Simbad = HD+16754
HD 16754 is a binary or triple-star system in the constellation Eridanus. It has the Bayer designation s Eridani; HD 16754 is the designation from the Henry Draper catalogue. The system is visible to the naked eye as a faint point of light with an apparent visual magnitude of +4.74. It is located at a distance of approximately 132 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +18 km/s. The system is a member of the Columba association of co-moving stars.
This object was flagged as an astrometric binary based on proper motion measurements made from the Hipparcos spacecraft. Zuckerman et al. (2011) consider it a multi-star system, with a bright A-type primary plus a faint M-type companion at an angular separation of to the north. The astrometric companion to the primary remains unresolved.
The main component is an A-type main-sequence star with a stellar classification of A1 Vb. Based upon stellar models, it has an age estimated at 212 million years. Consistency with its membership in the Columba association suggests a much younger age of 30 million years. Earlier measurements showed a high projected rotational velocity of 168 km/s. However, Ammler-von Eiff and Reiners (2012) found a much lower velocity of 13 km/s.
The visible companion is a red dwarf star with a class in the range M2-5V. The system is a source of X-ray emission with a luminosity of , which is most likely coming from this component and the unresolved companion.
References
| last1=Zuckerman | first1=B. | last2=Rhee | first2=Joseph H. | last3=Song | first3=Inseok | last4=Bessell | first4=M. S. | title=The Tucana/Horologium, Columba, AB Doradus, and Argus Associations: New Members and Dusty Debris Disks | display-authors=1 | journal=The Astrophysical Journal | volume=732 | issue=2 | date=May 2011 | page=61 | bibcode=2011ApJ...732...61Z | arxiv=1104.0284v1 | doi=10.1088/0004-637X/732/2/61 | s2cid=62797470 | postscript=. }}
| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | postscript=. | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 }}
| display-authors=1 | last1=Frankowski | first1=A. | last2=Jancart | first2=S. | last3=Jorissen | first3=A. | title=Proper-motion binaries in the Hipparcos catalogue. Comparison with radial velocity data | journal=Astronomy and Astrophysics | volume=464 | issue=1 | pages=377–392 | date=March 2007 | doi=10.1051/0004-6361:20065526 | bibcode=2007A&A...464..377F | arxiv=astro-ph/0612449 | s2cid=14010423 | postscript=. }}
| last1=Makarov | first1=V. V. | last2=Kaplan | first2=G. H. | title=Statistical Constraints for Astrometric Binaries with Nonlinear Motion | journal=The Astronomical Journal | postscript=. | volume=129 | issue=5 | pages=2420–2427 | date=May 2005 | doi=10.1086/429590 | bibcode=2005AJ....129.2420M | doi-access=free }}
| last1=Schröder | first1=C. | last2=Schmitt | first2=J. H. M. M. | title=X-ray emission from A-type stars | journal=Astronomy and Astrophysics | postscript=. | volume=475 | issue=2 |date=November 2007 | pages=677–684 | doi=10.1051/0004-6361:20077429 | bibcode=2007A&A...475..677S | doi-access=free }}
| title=Search for associations containing young stars (SACY). VII. New stellar and substellar candidate members in the young associations | last1=Elliott | first1=P. | last2=Bayo | first2=A. | last3=Melo | first3=C. H. F. | last4=Torres | first4=C. A. O. | last5=Sterzik | first5=M. F. | last6=Quast | first6=G. R. | last7=Montes | first7=D. | last8=Brahm | first8=R. | display-authors=1 | journal=Astronomy & Astrophysics | volume=590 | id=A13 | pages=28 | date=May 2016 | doi=10.1051/0004-6361/201628253 | arxiv=1604.03550 | bibcode=2016A&A...590A..13E | s2cid=53138126 | postscript=. }}
| title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | postscript=. | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | arxiv=1108.4971 | doi=10.1134/S1063773712050015 | s2cid=119257644 }}
| title=Validation of the new Hipparcos reduction | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}
| last1=Ammler-von Eiff | first1=Matthias | last2=Reiners | first2=Ansgar | title=New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars? | journal=Astronomy & Astrophysics | arxiv=1204.2459 | volume=542 | page=A116 | date=June 2012 | postscript=. | doi=10.1051/0004-6361/201118724 | bibcode=2012A&A...542A.116A | s2cid=53666672 }}
| last1=Gray | first1=R. O. | last2=Corbally | first2=C. J. | last3=Garrison | first3=R. F. | last4=McFadden | first4=M. T. | last5=Bubar | first5=E. J. | last6=McGahee | first6=C. E. | last7=O'Donoghue | first7=A. A. | last8=Knox | first8=E. R. | title=Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample | display-authors=1 | journal=The Astronomical Journal | volume=132 | issue=1 | pages=161–170 | date=July 2006 | doi=10.1086/504637 | bibcode=2006AJ....132..161G | arxiv=astro-ph/0603770 | s2cid=119476992 | postscript=. }}
| last1=Díaz | first1=C. G. | last2=González | first2=J. F. | last3=Levato | first3=H. | last4=Grosso | first4=M. | title=Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum | display-authors=1 | journal=Astronomy & Astrophysics | volume=531 | page=A143 |date=July 2011 | bibcode=2011A&A...531A.143D | arxiv=1012.4858 | doi=10.1051/0004-6361/201016386 | s2cid=119286673 | postscript=. }}
| last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A. | title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets | journal=The Astrophysical Journal | volume=804 | issue=2 | pages=146 | year=2015 | bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146 | arxiv=1501.03154 | s2cid=33401607 | postscript=. }}
References
- "HD 16754".
- {{Cite Gaia DR2. 4946915263923114368
- {{cite constellation. HD 16754
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