K-type giant star in the constellation Crater
Delta Crateris (δ Crt, δ Crateris) is a solitary star in the southern constellation of Crater . With an apparent visual magnitude of 3.56, it is the brightest star in this rather dim constellation. It has an annual parallax shift of 17.017 mas as measured from Earth, 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. The star has an estimated 1.47 times the mass of the Sun but has expanded to 20 times the Sun's radius .
It is around 2.89 billion years old with a rotation rate that is too small to measure; the projected rotational velocity is 0.0 km/s. Delta Crateris is radiating 171.4±9.0 as much luminosity as the Sun from its outer envelope at an effective temperature of 4,540 K.
References
^ 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 .
^ Mallik, Sushma V. (December 1999), "Lithium abundance and mass", Astronomy and Astrophysics , 352 : 495–507, Bibcode :1999A&A...352..495M .
^ 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 .
^ 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 .
^ Reffert, Sabine; Bergmann, Christoph; Quirrenbach, Andreas; Trifonov, Trifon; Künstler, Andreas (2015-02-01). "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity". Astronomy and Astrophysics . 574 : A116. arXiv :1412.4634 . Bibcode :2015A&A...574A.116R . doi :10.1051/0004-6361/201322360 . ISSN 0004-6361 .
^ 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 .
"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
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Location of δ Crateris (circled)
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