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Star in the constellation Centaurus
HD 98176 , also designated as HIP 55133 and rarely 22 G. Centauri , is a solitary, white hued
star located in the southern
constellation
Centaurus . It has an
apparent magnitude of 6.44,
[2] placing it near the limit for
naked eye visibility. Based on
parallax measurements from
Gaia DR3 , the object is estimated to be 348
light years distant.
[1] At its current distance, its brightness is diminished by 0.32
magnitudes due to interstellar dust.
[13] Pauzen et al. (2001) lists it as a potential
λ Boötis star .
[14]
This is an ordinary
A-type main-sequence star with a
stellar classification of A0 V.
[3] Pauzen et al. (2001) gives it a slightly cooler class of A1 Vn,
[14] which includes broad
absorption lines due to rapid rotation. It has 2.5 times the
mass of the Sun
[6] and double its
radius .
[7] It radiates 28.3 times the
luminosity of the Sun
[8] from its
photosphere at an
effective temperature of 9,774
K .
[6] Based on parameters derived from extinction in the
Gaia passband , HD 98176 has an
iron abundance 19% below solar levels.
References
^
a
b
c
d
e Vallenari, A.; et al. (Gaia collaboration) (2023).
"Gaia Data Release 3. Summary of the content and survey properties" . Astronomy and Astrophysics . 674 : A1.
arXiv :
2208.00211 .
Bibcode :
2023A&A...674A...1G .
doi :
10.1051/0004-6361/202243940 .
S2CID
244398875 .
Gaia DR3 record for this source at
VizieR .
^
a
b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics . 355 : L27–L30.
Bibcode :
2000A&A...355L..27H .
ISSN
0004-6361 .
^
a
b Houk, Nancy (1978). Michigan catalogue of two-dimensional spectral types for the HD stars Volume II: Declinations −52° to −41° .
Bibcode :
1978mcts.book.....H .
^
a
b Pickles, A.; Depagne, É. (December 2010).
"All-Sky Spectrally MatchedUBVRI - ZY and u ′ g ′ r ′ i ′ z ′ Magnitudes for Stars in the Tycho2 Catalog" . Publications of the Astronomical Society of the Pacific . 122 (898): 1437–1464.
arXiv :
1011.2020 .
Bibcode :
2010PASP..122.1437P .
doi :
10.1086/657947 .
eISSN
1538-3873 .
ISSN
0004-6280 .
^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331–346.
arXiv :
1108.4971 .
Bibcode :
2012AstL...38..331A .
doi :
10.1134/S1063773712050015 .
eISSN
1562-6873 .
ISSN
1063-7737 .
S2CID
119257644 .
^
a
b
c
d Stassun, Keivan G.; et al. (9 September 2019).
"The Revised TESS Input Catalog and Candidate Target List" . The Astronomical Journal . 158 (4): 138.
arXiv :
1905.10694 .
Bibcode :
2019AJ....158..138S .
doi :
10.3847/1538-3881/ab3467 .
eISSN
1538-3881 .
hdl :
1721.1/124721 .
S2CID
166227927 .
^
a
b Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022).
"Stellar and substellar companions from Gaia EDR3" . Astronomy & Astrophysics . 657 : A7.
arXiv :
2109.10912 .
Bibcode :
2022A&A...657A...7K .
doi :
10.1051/0004-6361/202142146 .
eISSN
1432-0746 .
ISSN
0004-6361 .
^
a
b McDonald, I.; Zijlstra, A. A.; Watson, R. A. (15 June 2017).
"Fundamental parameters and infrared excesses of Tycho–Gaia stars" . Monthly Notices of the Royal Astronomical Society . 471 (1): 770–791.
arXiv :
1706.02208 .
Bibcode :
2017MNRAS.471..770M .
doi :
10.1093/mnras/stx1433 .
eISSN
1365-2966 .
ISSN
0035-8711 .
^ Lafrasse, Sylvain; Mella, Guillaume; Bonneau, Daniel; Duvert, Gilles; Delfosse, Xavier; Chesneau, Olivier; Chelli, Alain (16 July 2010). "Building the 'JMMC Stellar Diameters Catalog' using SearchCal". Optical and Infrared Interferometry II . Vol. 7734. pp. 77344E.
arXiv :
1009.0137 .
Bibcode :
2010SPIE.7734E..4EL .
doi :
10.1117/12.857024 .
S2CID
32097037 .
^ Anders, F.; et al. (February 2022).
"Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5" . Astronomy & Astrophysics . 658 : A91.
arXiv :
2111.01860 .
Bibcode :
2022A&A...658A..91A .
doi :
10.1051/0004-6361/202142369 .
eISSN
1432-0746 .
ISSN
0004-6361 .
^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino . 1 .
Bibcode :
1879RNAO....1.....G .
^
"HD 98176" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved 4 July 2021 .
^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017).
"Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars" . Monthly Notices of the Royal Astronomical Society . 472 (4): 3805–3820.
arXiv :
1709.01160 .
Bibcode :
2017MNRAS.472.3805G .
doi :
10.1093/mnras/stx2219 .
eISSN
1365-2966 .
ISSN
0035-8711 .
^
a
b Paunzen, E.; Duffee, B.; Heiter, U.; Kuschnig, R.; Weiss, W. W. (July 2001).
"A spectroscopic survey for λ Bootis stars" . Astronomy & Astrophysics . 373 (2): 625–632.
Bibcode :
2001A&A...373..625P .
doi :
10.1051/0004-6361:20010630 .
eISSN
1432-0746 .
ISSN
0004-6361 .