Crux epsilon

Crux epsilon star [1] Epsilon Crucis
Constellation	Crux
Apparent magnitude (V)	3.59[1]
Variable star type	It is suspicious [2]
Classification	Orange big star
Position Epoch: J2000.0[1]
Right ascension (RA,α)	12h 21m 21.60936s [1]
Declination (Dec,δ)	-60° 24′ 04.1291″[1]
Red shift	-0.000015[1]
Radial velocity (Rv)	-4.60km/s [1]
Proper motion (μ)	Right ascension: -170.93 milliseconds / year [1] Declination: -91.67 milliseconds / year [1]
Annual parallax (π)	14.19 +-0.17 milliseconds [1]
Distance	229.74 +-2.79 light-year [note 1] (70.47+-0.85 parsec) [note 1]
Absolute magnitude (MV)	-0.63 ± 0.09[3]
Position of the epsilon star
Physical property
Radius	32.9 +-2.5 R☉[3]
Mass	1.42 +-0.22 M☉[3]
Surface gravity	1.52 +-0.11 log g[3]
Spectral class	K3/4III[1]
Surface temperature	4,148 K[3]
Color index (B-V)	+ 1.42[4]
Color index (U-B)	+ 1.63[4]
Color index (R-I)	+ 0.74[4]
Quantity of metal [Fe/H]	-0.10[3]
Age	2.83 ± 1.20*109 year [3]
The other name
The other name	Intrometida[5], CD -59 4221 [1], FK5 2989 [1], HD 107446 [1], HIP 60260 [1], HR 4700 [1], NSV 5568 [1], SAO 251862 [1]
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A Crux epsilon star is the fourth prize star that is bright next to four stars forming a cross at a fixed star of Crux.

Table of contents

Characteristic

It is an orange big star [¹]. With four spirited stars of Crux, it is drawn on Australia, Papua New Guinea, the Brazilian national flag. I am considered to be a star symbolizing Espirito Santo in the Brazilian national flag [⁶].

Name

The scientific name εCrucis (as for the abbreviated designation εCru). イントロメティダ (Intrometida^[5]) of the name comes from words to mean "intrusive person" "unnecessary interference" in Portuguese [⁵].

Footnote

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Explanatory note

1. The ^ ^{a b} parsec calculates calculation (as for the error, like), light-year than parsec *3.26 than 1/ annual parallax (second). Each effective figure decimal second place

Source

1. ^ ^{a b c d e f g h i j k l m n o p q r s} "SIMBAD Astronomical Database". Result for eps Cru. February 15, 2017 reading.
2. ^ "NSV." Results for NSV 5568. February 15, 2017 reading.
3. ^ ^{a b c d e f g} da Silva, L.; Girardi, L.; Pasquini, L.; Setiawan, J.; von der Lühe, O.; de Medeiros, J. R.; Hatzes, A.; Döllinger, M. P. et al. (2006). "Basic physical parameters of a selected sample of evolved stars." Astronomy and Astrophysics 458 (2): 609-623. doi: 10.1051/0004-6361:20065105. ISSN 0004-6361. 
4. ^ ^{a b c} 輝星星表The fifth edition
5. ^ ^{a b c} da Silva Oliveira, R.. "Crux Australis: o Cruzeiro do Sul". Artigos: Planetario Movel Inflavel AsterDomus.. July 5, 2014 reading.
6. ^ "Astronomy of the Brazilian Flag". FOTW Flags Of The World website. July 5, 2014 reading.

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