A | B | C | D | E | F | G | H | CH | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Carina |
Right ascension | 06h 49m 51.31414s[1] |
Declination | −53° 37′ 20.8182″[1] |
Apparent magnitude (V) | +4.40[2] ([3]) |
Characteristics | |
Spectral type | G6II + A1V[4] |
U−B color index | +0.61[2] |
B−V color index | +0.92[2] |
R−I color index | +0.45[2] |
Variable type | EA[3] |
Astrometry | |
Radial velocity (Rv) | 26.0 ± 0.9[5] km/s |
Proper motion (μ) | RA: −1.99[1] mas/yr Dec.: 17.58[1] mas/yr |
Parallax (π) | 5.99 ± 0.18 mas[1] |
Distance | 182[4] pc |
Absolute magnitude (MV) | –1.58[6] |
Orbit[7] | |
Period (P) | 195.245 days |
Eccentricity (e) | 0.00585 |
Inclination (i) | 82.7° |
Semi-amplitude (K1) (primary) | 24.2535 km/s |
Semi-amplitude (K2) (secondary) | 38.6[4] km/s |
Details[4] | |
A | |
Mass | 3.14 M☉ |
Radius | 31.3 R☉ |
Luminosity | 537 L☉ |
Surface gravity (log g) | 1.94 cgs |
Temperature | 4,981 K |
B | |
Mass | 1.98 M☉ |
Radius | 1.9 R☉ |
Luminosity | 25 L☉ |
Surface gravity (log g) | 4,18 cgs |
Temperature | 9,388 K |
Metallicity | −0.04 |
Other designations | |
Database references | |
SIMBAD | data |
HR 2554, also known as V415 Carinae and A Carinae, is an eclipsing spectroscopic binary of the Algol type in the constellation of Carina whose apparent visual magnitude varies by 0.06 magnitude and is approximately 4.39 at maximum brightness. Its primary is a G-type bright giant star and its secondary is an A-type main-sequence star. It is approximately 553 light-years from Earth.
HR 2554 A
The primary component, HR 2554 A, is a yellow G-type bright giant with a mean apparent magnitude of +4.4.
HR 2554 B
The secondary component, HR 2554 B, is a white A-type main-sequence dwarf, about three magnitudes fainter than the primary.
HR 2554 binary system
HR 2554 has two components in orbit around each other, making it a binary star. The semi-major axis of the secondary's orbit is 2.17 arcseconds. The two components regularly eclipse each other, making A Carinae a variable star. Its brightness varies by 0.06 magnitude with a period equal to its orbital period of 195 days.[3]
References
- ^ a b c d e 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.
- ^ a b c d HR 2554, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line August 23, 2008.
- ^ a b c Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- ^ a b c d Brown, Alexander; Bennett, Philip D.; Baade, Robert; Kirsch, Thomas; Reimers, Dieter; Hatzes, Artie P.; Kürster, Martin (2001). "Ultraviolet Eclipse Observations and Fundamental Parameters of the Binary HR 2554 (G6 II+A1 V)". The Astronomical Journal. 122 (1): 392–401. Bibcode:2001AJ....122..392B. doi:10.1086/321125.
- ^ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Washington. Bibcode:1953GCRV..C......0W.
- ^ Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: A116, arXiv:1204.2459, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, S2CID 53666672.
- ^ Komonjinda, Siramas; Hearnshaw, John B.; Ramm, David J. (2011). "Orbital solutions for six spectroscopic binaries with circular or nearly circular orbits". Monthly Notices of the Royal Astronomical Society. 410 (3): 1761. Bibcode:2011MNRAS.410.1761K. doi:10.1111/j.1365-2966.2010.17558.x.
- ^ Schröder, K. P.; Hünsch, M. (April 1992). "Optical spectra of ζ Aurigae systems. IV. The January 1990 eclipse of HR 2554 : detection of chromospheric absorption and extended plasma at ≈ 105 K". Astronomy & Astrophysics. 257: 219–227. Bibcode:1992A&A...257..219S. Retrieved 22 November 2021.
Text je dostupný za podmienok Creative Commons Attribution/Share-Alike License 3.0 Unported; prípadne za ďalších podmienok. Podrobnejšie informácie nájdete na stránke Podmienky použitia.
Antropológia
Aplikované vedy
Bibliometria
Dejiny vedy
Encyklopédie
Filozofia vedy
Forenzné vedy
Humanitné vedy
Knižničná veda
Kryogenika
Kryptológia
Kulturológia
Literárna veda
Medzidisciplinárne oblasti
Metódy kvantitatívnej analýzy
Metavedy
Metodika
Text je dostupný za podmienok Creative
Commons Attribution/Share-Alike License 3.0 Unported; prípadne za ďalších
podmienok.
Podrobnejšie informácie nájdete na stránke Podmienky
použitia.
www.astronomia.sk | www.biologia.sk | www.botanika.sk | www.dejiny.sk | www.economy.sk | www.elektrotechnika.sk | www.estetika.sk | www.farmakologia.sk | www.filozofia.sk | Fyzika | www.futurologia.sk | www.genetika.sk | www.chemia.sk | www.lingvistika.sk | www.politologia.sk | www.psychologia.sk | www.sexuologia.sk | www.sociologia.sk | www.veda.sk I www.zoologia.sk