Alzir

from Wikipedia, the free encyclopedia
Star
Alzir
Location of Alzir
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Twins
Right ascension 06 h 45 m 17.37 s
declination + 12 ° 53 ′ 44.1 ″
Apparent brightness 3.35 mag
Typing
B − V color index +0.43 
U − B color index +0.06 
R − I index +0.23 
Spectral class F5 IV
Astrometry
Radial velocity (27.2 ± 0.7) km / s
parallax (55.56 ± 0.19)  mas
distance (58.7 ± 0.2)  ly
(18.00 ± 0.06)  pc  
Visual absolute brightness M vis +2.07 mag
Proper movement 
Rec. Share: (−115.73 ± 0.20)  mas / a
Dec. portion: (−190.55 ± 0.15)  mas / a
Physical Properties
Other names
and catalog entries
Bayer name ξ Geminorum
Flamsteed name 31 Geminorum
Bonn survey BD + 13 ° 1396
Bright Star Catalog HR 2484 [1]
Henry Draper Catalog HD 48737 [2]
Gliese catalog FY 242 [3]
Hipparcos catalog HIP 32362 [4]
SAO catalog SAO 96074 [5]
Tycho catalog TYC 754-2356-1 [6]
2MASS catalog 2MASS J06451737 + 1253438 [7]
Other names Alzir, Alzirr, FK5  256
annotation
  1. ↑ Calculated from apparent brightness and distance.

Alzir (IAU spelling: Alzirr ), Bayer name Xi Geminorum (ξ Gem), is a star in the constellation Gemini . The name comes from Arabic الزر, DMG az-zirr  'the button'.

Alzir belongs to the spectral class F6 and has an apparent brightness of +3.35 m . It is 59 light years from the sun .

Individual evidence

  1. ↑ a b c Hipparcos catalog (ESA 1997)
  2. ↑ a b c Bright Star Catalog
  3. ↑ Pulkovo radial velocities for 35493 HIP stars
  4. ↑ a b c Hipparcos, the New Reduction (van Leeuwen, 2007)
  5. ↑ Naming Stars. IAU , accessed on August 23, 2020 .