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G-type giant star in the constellation Auriga
κ Aurigae
Location of κ Aurigae (circled) |
Observation data
Epoch J2000
Equinox J2000
|
Constellation
|
Auriga
|
Right ascension
|
06h 15m 22.68906s
[1]
|
Declination
|
+29° 29′ 53.0760″
[1]
|
Apparent magnitude (V)
|
4.335
[2]
|
Characteristics
|
Evolutionary stage
|
horizontal branch
[3]
|
Spectral type
|
G8.5 IIIb
[4]
|
U−B
color index
|
+0.812
[2]
|
B−V
color index
|
+1.023
[2]
|
R−I
color index
|
0.54
|
Astrometry |
---|
|
---|
Radial velocity (Rv) | +20.69 ± 0.15
[5] km/s |
Proper motion (μ) |
RA: −70.88
[1]
mas/
yr
Dec.: −261.42
[1]
mas/
yr |
Parallax (π) | 18.43 ± 0.23
mas
[1] |
Distance | 177 ± 2
ly (54.3 ± 0.7
pc) |
Absolute magnitude (MV) | +0.65
[6] |
|
Details |
---|
|
---|
Mass | 1.25
[7]
M☉ |
Radius | 11
[5]
R☉ |
Luminosity | 54
[5]
L☉ |
Surface gravity (log g) | 2.7
[5]
cgs |
Temperature | 4,732
[5]
K |
Metallicity [Fe/H] | −0.33
[5]
dex |
Rotational velocity (v sin i) | 2.5
[5] km/s |
Age | 5.59
[7]
Gyr |
|
Other designations |
---|
κ Aur, 44 Aurigae,
BD+29°1154,
FK5 1168,
HD 43039,
HIP 29696,
HR 2219,
SAO 78143,
2MASS J06152269+2929535, Gaia DR2 3436911415279548032
[8] |
Database references |
---|
SIMBAD |
data |
Kappa Aurigae,
Latinised from κ Aurigae, is the
Bayer designation for a
star in the
northern
constellation of
Auriga. It is visible to the naked eye with an
apparent visual magnitude of 4.3.
[2] Based upon an annual
parallax shift of 18.43
mas,
[1] it is approximately 177
light-years (54
parsecs) distant from Earth.
This is an
evolved
giant star with a
stellar classification of G8.5 IIIb.
[4] It is a
red clump star, which means it is towards the cool end of the
horizontal branch and is generating energy through the fusion of helium at its core.
[3] Kappa Aurigae has expanded to 11 times the
radius of the Sun and shines with 54 times the
Sun's luminosity. This energy is radiated into outer space from the
outer envelope at an
effective temperature of 4,732
K.
[5] At this heat, the star glows with the orange hue of a
G-type star.
[9]
References
- ^
a
b
c
d
e
f van Leeuwen, F. (November 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.
- ^
a
b
c
d Jennens, P. A.; Helfer, H. L. (September 1975), "A new photometric metal abundance and luminosity calibration for field G and K giants",
Monthly Notices of the Royal Astronomical Society, 172 (3): 667–679,
Bibcode:
1975MNRAS.172..667J,
doi:
10.1093/mnras/172.3.667.
- ^
a
b 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.
- ^
a
b 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.
- ^
a
b
c
d
e
f
g
h Massarotti, Alessandro; et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity", The Astronomical Journal, 135 (1): 209–231,
Bibcode:
2008AJ....135..209M,
doi:
10.1088/0004-6256/135/1/209,
S2CID
121883397.
-
^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331,
arXiv:
1108.4971,
Bibcode:
2012AstL...38..331A,
doi:
10.1134/S1063773712050015,
S2CID
119257644.
- ^
a
b Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal, 150 (3): 88,
arXiv:
1507.01466,
Bibcode:
2015AJ....150...88L,
doi:
10.1088/0004-6256/150/3/88,
S2CID
118505114.
-
^
"* kap Aur".
SIMBAD.
Centre de données astronomiques de Strasbourg. Retrieved 2012-07-18.
-
^
"The Colour of Stars", Australia Telescope, Outreach and Education,
Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from
the original on February 22, 2012, retrieved 2012-01-16.
References