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K-type giant star in the constellation Crater
Delta Crateris (δ Crt, δ Crateris) is a solitary
[8]
star in the southern
constellation of
Crater . With an
apparent visual magnitude of 3.56,
[2] it is the brightest star
[9] in this rather dim constellation. It has an annual
parallax shift of 17.017
mas as measured from Earth,
[1] indicating Delta Crateris lies at a distance of 192
ly from the Sun.
Characteristics
This is an
evolved orange-hued
giant star belonging to the
spectral class K0 III. Delta Crateris is a member of the so-called
red clump , indicating that it is generating energy through the
thermonuclear fusion of helium at its core.
[4] The star has an estimated 1.47 times the
mass of the Sun but has expanded to 16.2 times the
Sun's radius .
[5]
The
metallicity of the star – what astronomers term the abundance of elements other than hydrogen and helium – is only 40% that of the Sun.
[5]
[a] It is around 2.89
[10] billion years old with a rotation rate that is too small to measure; the
projected rotational velocity is 0.0 km/s.
[3] Delta Crateris is radiating 171.4± 9.0 as much
luminosity as the Sun
[10] from its
outer envelope at an
effective temperature of 4,605 K.
[5]
Notes
^ The abundance is estimated by taking [Fe/H] to the power of ten: 10[Fe/H] = 10-0.4 = 0.4
References
^
a
b
c
d
e
f 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
c
d Mallik, Sushma V. (December 1999), "Lithium abundance and mass", Astronomy and Astrophysics , 352 : 495–507,
Bibcode :
1999A&A...352..495M .
^
a
b 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 .
^
a
b Soubiran, C.; et al. (2008), "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants", Astronomy and Astrophysics , 480 (1): 91–101,
arXiv :
0712.1370 ,
Bibcode :
2008A&A...480...91S ,
doi :
10.1051/0004-6361:20078788 ,
S2CID
16602121 .
^
a
b
c
d Gomes da Silva, J.; Santos, N. C.; Adibekyan, V.; Sousa, S. G.; Campante, T. L.; Figueira, P.; Bossini, D.; Delgado-Mena, E.; Monteiro, M. J. P. F. G.; de Laverny, P.; Recio-Blanco, A.; Lovis, C. (2021-02-01).
"Stellar chromospheric activity of 1674 FGK stars from the AMBRE-HARPS sample. I. A catalogue of homogeneous chromospheric activity" . Astronomy and Astrophysics . 646 : A77.
arXiv :
2012.10199 .
doi :
10.1051/0004-6361/202039765 .
ISSN
0004-6361 .
Delta Crateris' database entry at
VizieR .
^ Berio, P.; et al. (November 2011), "Chromosphere of K giant stars. Geometrical extent and spatial structure detection", Astronomy & Astrophysics , 535 : A59,
arXiv :
1109.5476 ,
Bibcode :
2011A&A...535A..59B ,
doi :
10.1051/0004-6361/201117479 ,
S2CID
17171848 .
^
"del Crt" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved 2017-03-02 . {{
cite web }}
: CS1 maint: postscript (
link )
^ 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 .
^ Ridpath, Ian (2012),
A Dictionary of Astronomy ,
OUP Oxford , p. 108,
ISBN
978-0199609055 .
^
a
b Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", Astronomical Journal , 150 (3), 88,
arXiv :
1507.01466 ,
Bibcode :
2015AJ....150...88L ,
doi :
10.1088/0004-6256/150/3/88 ,
S2CID
118505114 .
External links