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Aging giant star in the constellation of Orion
29 Orionis is a single
[9]
star located around 157
[1]
light years away from the Sun in the
equatorial
constellation of
Orion . In Bayer's
Uranometria , this star is one of two stars (the other being
Upsilon Orionis ) marking the top of Orion's right boot.
[10] It has the
Bayer designation e Orionis , while 29 Orionis is the
Flamsteed designation . This object is visible to the naked eye as a faint, yellow-hued point of light with an
apparent visual magnitude of 4.13.
[2] It is moving closer to the Earth with a heliocentric
radial velocity of -18 km/s.
[5]
This is an aging
giant star with a
stellar classification of G8IIIFe-0.5,
[3] having exhausted the supply of hydrogen at its
core and
evolved away from the
main sequence . The suffix notation indicates a mild underabundance of iron in the
spectrum . It is a
red clump giant,
[11] which means it is on the
horizontal branch and is generating energy through
helium fusion at its core. The star has 2.33
[2] times the
mass of the Sun and has expanded to 10.36
[5] times the
Sun's radius . It is radiating 71 times the
Sun's luminosity from its enlarged
photosphere at an
effective temperature of 4,852 K.
[2]
References
^
a
b
c
d
e
f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics . 474 (2): 653–664.
arXiv :
0708.1752 .
Bibcode :
2007A&A...474..653V .
doi :
10.1051/0004-6361:20078357 .
S2CID
18759600 .
Vizier catalog entry
^
a
b
c
d
e
f
g
h
i Takeda, Yoichi; Sato, Bun'ei; Murata, Daisuke (2008). "Stellar Parameters and Elemental Abundances of Late-G Giants". Publications of the Astronomical Society of Japan . 60 (4): 781–802.
arXiv :
0805.2434 .
Bibcode :
2008PASJ...60..781T .
doi :
10.1093/pasj/60.4.781 .
S2CID
16258166 .
^
a
b Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H . 5050 .
Bibcode :
1995yCat.5050....0H .
^
a
b Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues . 2237 .
Bibcode :
2002yCat.2237....0D .
^
a
b
c
d Jofré, E.; Petrucci, R.; Saffe, C.; Saker, L.; Artur de la Villarmois, E.; Chavero, C.; Gómez, M.; Mauas, P. J. D. (2015). "Stellar parameters and chemical abundances of 223 evolved stars with and without planets". Astronomy & Astrophysics . 574 : A50.
arXiv :
1410.6422 .
Bibcode :
2015A&A...574A..50J .
doi :
10.1051/0004-6361/201424474 .
S2CID
53666931 .
Vizier catalog entry
^ Da Silva, Ronaldo; Milone, André de C.; Rocha-Pinto, Helio J. (2015). "Homogeneous abundance analysis of FGK dwarf, subgiant, and giant stars with and without giant planets". Astronomy & Astrophysics . 580 : A24.
arXiv :
1505.01726 .
Bibcode :
2015A&A...580A..24D .
doi :
10.1051/0004-6361/201525770 .
S2CID
119216425 .
Vizier catalog entry
^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (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 .
S2CID
54046583 .
Vizier catalog entry
^
"e Ori" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved 2019-06-19 .
^ Eggleton, P. P.; Tokovinin, A. A. (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 .
S2CID
14878976 .
^ Wagman, Morton (2003). Lost Stars: Lost, Missing and Troublesome Stars from the Catalogues of Johannes Bayer, Nicholas Louis de Lacaille, John Flamsteed, and Sundry Others . Blacksburg,
VA : The McDonald & Woodward Publishing Company. p. 513.
ISBN
978-0-939923-78-6 .
^ Alves, David R. (August 2000). "K-Band Calibration of the Red Clump Luminosity". The Astrophysical Journal . 539 (2): 732–741.
arXiv :
astro-ph/0003329 .
Bibcode :
2000ApJ...539..732A .
doi :
10.1086/309278 .
S2CID
16673121 .