Secunda Hyadum

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Database links to δ1 Tauri

Double star
Secunda Hyadum (δ¹ Tauri)

Observation
dates equinox : J2000.0 , epoch : J2000.0

Right ascension

04 ^h 22 ^m 56.1 ^s

+ 17 ° 32 ′ 33.1 ″

Apparent brightness

3.76 likes

Typing

B − V color index

(0.98)

U − B color index

(0.84)

K0 III

Variable star type

supposed

Radial velocity

(37.91 ± 0.04) km / s

(19.06 ± 0.37) mas

distance

(171 ± 3) ly
(52) pc

Proper movement

Rec. Share:

(100.78 ± 0.92) mas / a

Dec. portion:

(−28.08 ± 0.64) mas / a

Physical Properties

(2.54 ± 0.13) M _☉

(10.89 ± 0.50) R _☉

(74 ± 12) L _☉

Effective temperature

(4983 ± 15) K.

Metallicity [Fe / H]

(0.02 ± 0.06)

Age

(0.62 ± 0.11) a

Other names
and catalog entries

Bayer name	δ ¹ Tauri
Flamsteed name	61 Tauri
Bonn survey	BD + 17 ° 712
Bright Star Catalog	HR 1373 [1]
Henry Draper Catalog	HD 27697 [2]
Hipparcos catalog	HIP 20455 [3]
SAO catalog	SAO 93897 [4]
Tycho catalog	TYC 1268-1267-1 [5]
2MASS catalog	2MASS J04225609 + 1732331 [6]
Other names	FK5 162, WDS J04230 + 1732

Secunda Hyadum , or Hyadum II is the proper name of the double star δ ¹ Tauri (Delta1 Tauri), in the constellation Taurus . Hyadum II has an apparent brightness of +3.76 mag and belongs to the spectral class K0-IIICN0.5. Hyadum II is 150 light years from Earth.

Web links

http://stars.astro.illinois.edu/sow/hyadum2.html

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g del Tau. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed August 19, 2018 .
^ NSV 1582. In: VSX. AAVSO, accessed August 19, 2018 .
↑ ^a ^b ^c ^d ^e ^f E. Jofré, R. Petrucci, C. Saffe, L. Saker, E. Artur de la Villarmois, C. Chavero, M. Gómez, PJD Mauas: Stellar parameters and chemical abundances of 223 evolved stars with and without planets . In: Astronomy & Astrophysics . 574, 2015, p. A50. arxiv : 1410.6422 . bibcode : 2015A & A ... 574A..50J . doi : 10.1051 / 0004-6361 / 201424474 .