Əlfərd

Əlfərd
Əlfərd
	Ulduz
Müşahidə məlumatları; (Dövr J2000.0)
Birbaşa çıxma	9s 27d 35,24s
Meyl	−8° 39′ 30,96″
Görünən ulduz ölçüsü (V)	1,97
Bürc	Hidra
Astrometriya
Radial sürəti (Rv)	−4,561 ± 0,0001 km/san
	Fərdi hərəkət
• Birbaşa çıxma	−15,23 ± 0,19 mas/il
• Meyl	34,37 ± 0,13 mas/il
Parallaks (π)	18,09 ± 0,18 mas
Spektral xüsusiyyətləri
Ulduz təsnifatı	K3II/IIIBa1:
	Rəng indeksi
• B−V	1,45
• U−B	1,72
Fiziki xüsusiyyətləri
Temperaturu	4.095 K[…]
Metallığı	−0,07
Fırlanma	3,97 ± 0,63 km/san
Orbit elementləri
Digər təyinatlar
	GSC 05460-01592, HD 81797, HIP 46390, HR 3748, IRAS 09251-0826, SAO 136871, 2MASS J09273524-0839308, α Hya, CCDM J09277-0841A, CSV 101049, FK5 354, GC 13044, GCRV 6136, HIC 46390, IDS 09227-0814 A, IRC -10217, JP11 1813, N30 2249, NSV 4496, PLX 2247, PLX 2247.00, PMC 90-93 253, PPM 192393, RAFGL 1353, ROT 1471, SACS 209, TD1 13937, TYC 5460-1592-1, UBV 9023, WDS J09276-0840A, YZ 98 3683, WEB 8768, 30 Hya, TIC 46799297, UBV M 15411
Verilənlər bazasında məlumat
SIMBAD	* alf Hya

Əlfərd (Hidranın α-sı) — Hidra bürcündə ən parlaq ulduz. Parlaq nəhəngdir, Günəşdən 400 dəfə böyükdür.

İstinadlar

↑ ¹ ² ³ ⁴ ⁵ Leeuwen F. v. Validation of the new Hipparcos reduction (ing.). // Astron. Astrophys. / T. Forveille EDP Sciences, 2007. Vol. 474, Iss. 2. P. 653–664. ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 doi:10.1051/0004-6361:20078357 arXiv:0708.1752
↑ Ducati J. R. Catalogue of Stellar Photometry in Johnson's 11-color system (ing.). // (untranslated) VizieR, 2002. Vol. 2237.
↑ Soubiran C., Jasniewicz G., Chemin L., Zurbach C., Brouillet N., Panuzzo P., Sartoretti P., Katz D., Le Campion, J. -F., Marchal O. et al. Gaia Data Release 2. The catalogue of radial velocity standard stars (ing.). // Astron. Astrophys. / T. Forveille EDP Sciences, 2018. Vol. 616. 8 p. ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 doi:10.1051/0004-6361/201832795 arXiv:1804.09370
↑ Lu P. K. Taxonomy of barium stars (ing.). // Astron. J. / J. G. III, E. Vishniac NYC: IOP Publishing, AAS, University of Chicago Press, AIP, 1991. Vol. 101. P. 2229–2254. ISSN 0004-6256; 1538-3881 doi:10.1086/115845
↑ Jönsson H., Ryde N., Nordlander T., Rhodin A. P., Hartman H., Jönsson P., Eriksson K. Abundances of disk and bulge giants from high-resolution optical spectra (ing.): I. O, Mg, Ca, and Ti in the solar neighborhood and Kepler field samples. // Astron. Astrophys. / T. Forveille EDP Sciences, 2017. Vol. 598. 11 p. ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 doi:10.1051/0004-6361/201629128 arXiv:1611.05462
↑ ¹ ² Forsberg R., Ryde N., Jönsson H., Rich R. M., Johansen A. Abundances of disk and bulge giants from high-resolution optical spectra. V. Molybdenum: The p-process element (ing.). // Astron. Astrophys. / T. Forveille EDP Sciences, 2022. Vol. 666. 12 p. ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 doi:10.1051/0004-6361/202244013 arXiv:2206.13575
↑ Lomaeva M., Jonsson H., Ryde N., Thorsbro B., Schultheis M. Abundances of disk and bulge giants from high-resolution optical spectra (ing.): III. Sc, V, Cr, Mn, Co, Ni. // Astron. Astrophys. / T. Forveille EDP Sciences, 2019. Vol. 625. P. A141. 25 p. ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 doi:10.1051/0004-6361/201834247 arXiv:1903.01476
↑ Jofré E., Petrucci R., Saffe C., Saker L., Villarmois E. A. d. l., Chavero C., Gómez M., Mauas, P. J. D. Stellar parameters and chemical abundances of 223 evolved stars with and without planets (ing.). // Astron. Astrophys. / T. Forveille EDP Sciences, 2015. Vol. 574. 46 p. ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 doi:10.1051/0004-6361/201424474 arXiv:1410.6422

[_b523aab6d5d22b02-1] ¹ ² ³ ⁴ ⁵ Leeuwen F. v. Validation of the new Hipparcos reduction (ing.). // Astron. Astrophys. / T. Forveille EDP Sciences, 2007. Vol. 474, Iss. 2. P. 653–664. ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 doi:10.1051/0004-6361:20078357 arXiv:0708.1752

[_02917350919941e1-2] Ducati J. R. Catalogue of Stellar Photometry in Johnson's 11-color system (ing.). // (untranslated) VizieR, 2002. Vol. 2237.

[_63c840f3f9b95ff5-3] Soubiran C., Jasniewicz G., Chemin L., Zurbach C., Brouillet N., Panuzzo P., Sartoretti P., Katz D., Le Campion, J. -F., Marchal O. et al. Gaia Data Release 2. The catalogue of radial velocity standard stars (ing.). // Astron. Astrophys. / T. Forveille EDP Sciences, 2018. Vol. 616. 8 p. ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 doi:10.1051/0004-6361/201832795 arXiv:1804.09370

[_474ba21ee8402500-4] Lu P. K. Taxonomy of barium stars (ing.). // Astron. J. / J. G. III, E. Vishniac NYC: IOP Publishing, AAS, University of Chicago Press, AIP, 1991. Vol. 101. P. 2229–2254. ISSN 0004-6256; 1538-3881 doi:10.1086/115845

[_de07db09213f25d3-5] Jönsson H., Ryde N., Nordlander T., Rhodin A. P., Hartman H., Jönsson P., Eriksson K. Abundances of disk and bulge giants from high-resolution optical spectra (ing.): I. O, Mg, Ca, and Ti in the solar neighborhood and Kepler field samples. // Astron. Astrophys. / T. Forveille EDP Sciences, 2017. Vol. 598. 11 p. ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 doi:10.1051/0004-6361/201629128 arXiv:1611.05462

[_cb19ee9713563a8c-6] ¹ ² Forsberg R., Ryde N., Jönsson H., Rich R. M., Johansen A. Abundances of disk and bulge giants from high-resolution optical spectra. V. Molybdenum: The p-process element (ing.). // Astron. Astrophys. / T. Forveille EDP Sciences, 2022. Vol. 666. 12 p. ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 doi:10.1051/0004-6361/202244013 arXiv:2206.13575

[_14276bcb712e6cde-7] Lomaeva M., Jonsson H., Ryde N., Thorsbro B., Schultheis M. Abundances of disk and bulge giants from high-resolution optical spectra (ing.): III. Sc, V, Cr, Mn, Co, Ni. // Astron. Astrophys. / T. Forveille EDP Sciences, 2019. Vol. 625. P. A141. 25 p. ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 doi:10.1051/0004-6361/201834247 arXiv:1903.01476

[_6664cec79f05553c-8] Jofré E., Petrucci R., Saffe C., Saker L., Villarmois E. A. d. l., Chavero C., Gómez M., Mauas, P. J. D. Stellar parameters and chemical abundances of 223 evolved stars with and without planets (ing.). // Astron. Astrophys. / T. Forveille EDP Sciences, 2015. Vol. 574. 46 p. ISSN 0004-6361; 0365-0138; 1432-0746; 1286-4846 doi:10.1051/0004-6361/201424474 arXiv:1410.6422

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