Beta Hydrae
β Hydrae Data pengamatan Epoch J2000.0 Equinox J2000.0 (ICRS ) Rasi bintang Hydra Komponen A B Asensio rekta 11j 52m 11j 52m 54.521s 54.550s Deklinasi −33° 54′[ 1] −33° 54′[ 2] 29.25″ 28.73″ Magnitudo semu (V) 4.67[ 3] 5.47[ 3] 4.276(combined) [ 4] Karakteristik Klasifikasi bintang B9IIIsp...[ 4] U-B Indeks warna −0.33[ 5] B-V Indeks warna −0.10[ 5] R-I Indeks warna −0.08[ 5] Variable type ACV [ 6] Astrometri Kecepatan radial (Rv ) −1 ± 5[ 4] km/s Gerak diri : RA (μα δ ) −58.02[ 1] m.b /thn −52.70[ 2] m.b /thn Dec. (μδ 2.40[ 1] m.b /thn −8.94[ 2] m.b /thn Paralaks (π) 8.93 ± 0.88[ 4] m.b Jarak 370 ± 40 tc pc ) Magnitudo mutlak (MV ) −1.0[ 7] Details Massa 3.36 ± 0.15[ 8] M ☉ ~3[ 9] M ☉ Radius 4.0 ± 0.6[ 8] R ☉ Luminositas (bolometriks) 210[ 9] L ☉ Temperatur 11,100[ 8] K Umur 2.2 × 108 [ 9] thn Referensi Database SIMBAD data Nama lain β
Hya, Beta
Hydrae, Beta
Hya,
HJ 4478AB ,
CCDM J11529-3354AB,
CD −33
8018,
CPD −33
3159,
GC 16258,
HD 103192,
HIP 57936,
HR 4552,
IDS 11479-3321
AB,
PPM 289465,
SAO 202901,
WDS 11529-3354AB.
[ 4] [ 3]
Kurva cahaya untuk Beta Hydrae, diplot dari data satelit TESS Beta Hydrae (Beta Hya , β Hydrae , β Hya ) adalah bintang ganda yang ada di rasi bintang Hydra .[ 4] [ 10] Bp yang diklasifikasikan sebagai α² Canum Venaticorum.[ 4] [ 6]
Referensi
1 2 3 HIP 57936, record for component 1 , Hipparcos catalogue ; CDS ID I/239 .1 2 3 HIP 57936, record for component 2 , Hipparcos catalogue ; CDS ID I/239 .1 2 3 Entry 11529-3354, The Washington Double Star Catalog Diarsipkan 2008-04-13 di Wayback Machine .United States Naval Observatory . Accessed on line September 23, 2008. 1 2 3 4 5 6 7 V* alf Dor -- Variable Star , database entry, SIMBAD . Accessed on line September 3, 2008.1 2 3 HR 4552 , 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 September 23, 2008.1 2 Notes, Entry 11529-3354, The Washington Double Star Catalog Diarsipkan 2008-04-13 di Wayback Machine .United States Naval Observatory . Accessed on line September 23, 2008. ↑ Dari magnitudo semu dan paralaks. 1 2 3 North, P. (1998), "Do SI stars undergo any rotational braking?", Astronomy and Astrophysics , 334 : 181– 187, arXiv :astro-ph/9802286 Bibcode :1998A& A...334..181N 1 2 3 Beta Hydrae Diarsipkan 2008-09-05 di Wayback Machine .Stars , Jim Kaler. Accessed on line September 23, 2008.↑ bet Hya, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars Diarsipkan 2017-06-20 di Wayback Machine .
