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K-type giant; Corona Australis
HD 175219 , also known as HR 7122 , is a solitary,
[12] orange hued
star located in the southern
constellation
Corona Australis . It has an
apparent magnitude of 5.35,
[2] allowing it to be faintly visible to the
naked eye . The object is located relatively close at a distance of 314
light years based on
Gaia DR3
parallax measurements
[1] but is drifting closer with a heliocentric
radial velocity of −21.1
km/s .
[6] At its current distance, HD 175219's brightness is diminished by 0.26
magnitudes due to
interstellar dust .
[13] It has an
absolute magnitude of +0.57.
[7]
This is a
red giant with a
stellar classification of K0 III.
[3] An earlier source gives it a class of G6 III-IV,
[4] indicating that it is an
evolved
G-type star with a
luminosity class intermediate between a
giant star and a
subgiant . At present it has nearly twice the
mass of the Sun but it has expanded to 12.3 times the
Sun's radius .
[8] HD 175219 radiates 76.3 times the
luminosity of the Sun from its enlarged photosphere at an
effective temperature of 4,877
K .
[8] The star is metal deficient, having less than half the abundance of heavy
elements compared to the
Sun .
[8] Common for giant stars, it spins slowly, having a
projected rotational velocity too low to be measured accurately.
[9]
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 Evans, D. S.; Menzies, A.; Stoy, R. H. (1 December 1959).
"Fundamental Data for Southern Stars (Second List)" . Monthly Notices of the Royal Astronomical Society . 119 (6): 638–647.
Bibcode :
1959MNRAS.119..638E .
doi :
10.1093/mnras/119.6.638 .
eISSN
1365-2966 .
ISSN
0035-8711 .
^ Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory . 4 : 99–110.
Bibcode :
1966CoLPL...4...99J .
^
a
b Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters . 32 (11): 759–771.
arXiv :
1606.08053 .
Bibcode :
2006AstL...32..759G .
doi :
10.1134/S1063773706110065 .
eISSN
1562-6873 .
ISSN
1063-7737 .
S2CID
119231169 .
^
a
b 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
e
f
g
h
i Ottoni, G.; Udry, S.; Ségransan, D.; Buldgen, G.; Lovis, C.; Eggenberger, P.; Pezzotti, C.; Adibekyan, V.; Marmier, M.; Mayor, M.; Santos, N. C.; Sousa, S. G.; Lagarde, N.; Charbonnel, C. (January 2022).
"CORALIE radial-velocity search for companions around evolved stars (CASCADES): I. Sample definition and first results: Three new planets orbiting giant stars" . Astronomy & Astrophysics . 657 : A87.
arXiv :
2201.01528 .
Bibcode :
2022A&A...657A..87O .
doi :
10.1051/0004-6361/202040078 .
eISSN
1432-0746 .
ISSN
0004-6361 .
^
a
b De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014).
"A catalog of rotational and radial velocities for evolved stars" . Astronomy & Astrophysics . 561 : A126.
arXiv :
1312.3474 .
Bibcode :
2014A&A...561A.126D .
doi :
10.1051/0004-6361/201220762 .
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 175219" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved December 24, 2022 .
^ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008).
"A catalogue of multiplicity among bright stellar systems" . Monthly Notices of the Royal Astronomical Society . 389 (2): 869–879.
arXiv :
0806.2878 .
Bibcode :
2008MNRAS.389..869E .
doi :
10.1111/j.1365-2966.2008.13596.x .
eISSN
1365-2966 .
ISSN
0035-8711 .
S2CID
14878976 .
^ 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 .