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Star in the constellation of Octans
Pi1 Octantis (Pi1 Oct),
Latinized π1 Octantis , is a solitary
[11]
star in the southern
circumpolar constellation
Octans . It is faintly visible to the
naked eye with an
apparent magnitude 5.64, and is estimated to be 387
light years away. However, it is receding with a heliocentric
radial velocity of 14
km/s .
[5]
Pi1 Oct has a
stellar classification of G8/K0 III
[3] — intermediate between a G8 and K0
giant star . It has 2.74 times the
mass of the Sun and an
effective temperature of 5,002
k ,
[7] giving a yellow hue. However, an enlarged
radius of 11.62
R ☉ yields a
luminosity 76 times that of the
Sun .
[7] Pi1 Oct has a
metallicity
[7] around solar level and spins with a
projected rotational velocity lower than 1
km/s .
[8]
References
^
a
b
c
d
Brown, A. G. A. ; et al. (Gaia collaboration) (2021).
"Gaia Early Data Release 3: Summary of the contents and survey properties" .
Astronomy & Astrophysics . 649 : A1.
arXiv :
2012.01533 .
Bibcode :
2021A&A...649A...1G .
doi :
10.1051/0004-6361/202039657 .
S2CID
227254300 . (Erratum:
doi :
10.1051/0004-6361/202039657e ) .
Gaia EDR3 record for this source at
VizieR .
^ 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, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0 .
Bibcode :
1975mcts.book.....H .
^
a
b 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 .
ISSN
1063-7737 .
S2CID
119231169 .
^ 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 .
ISSN
1063-7737 .
S2CID
255204555 .
^
a
b
c
d 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 .
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: V. Southern stars⋆⋆⋆" . Astronomy & Astrophysics . 561 : A126.
arXiv :
1312.3474 .
Bibcode :
2014A&A...561A.126D .
doi :
10.1051/0004-6361/201220762 .
ISSN
0004-6361 .
^
"HD 46568" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved 7 June 2022 .
^ 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 .
^ 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 .