Delta Canis Majoris

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Star
Wezen (δ Canis Majoris)
AladinLite
Observation
dates equinoxJ2000.0 , epoch : J2000.0
Constellation Big dog
Right ascension 07 h 08 m 23.48 s
declination -26 ° 23 ′ 35.5 ″
Apparent brightness 1.83 likes
Typing
B − V color index +0.68 
U − B color index +0.54 
R − I index +0.33 
Spectral class F8 Ia
Variable star type ACYG 
Astrometry
Radial velocity (+32.0 ± 0.4) km / s
parallax (2.03 ± 0.38)  mas
distance (1600 ± 300)  ly
(490 ± 90)  pc  
Visual absolute brightness M vis approx. −6.6 mag
Proper movement 
Rec. Share: (−3.12 ± 0.26)  mas / a
Dec. portion: (+3.31 ± 0.34)  mas / a
Physical Properties
Dimensions 17  M
radius 200  R
Luminosity

50000  L

Effective temperature 6200  K
Other names
and catalog entries
Bayer name δ Canis Majoris
Flamsteed name 25 Canis Majoris
Cordoba Survey CD −26 ° 3916
Bright Star Catalog HR 2693 [1]
Henry Draper Catalog HD 54605 [2]
Hipparcos catalog HIP 34444 [3]
SAO catalog SAO 173047 [4]
Tycho catalog TYC 6532-5001-1 [5]
2MASS catalog 2MASS J07082348-2623354 [6]
Other names FK5 273
annotation
  1. estimated from apparent brightness and distance

δ Canis Majoris ( Delta Canis Majoris , δ CMa for short ) is a star with an apparent magnitude of 1.8 mag in the constellation of the Big Dog . The star bears the historical proper name Wezen / Alwazn / Wesen / Al Wazor ; this is from the Arabicالوزن al-wazn derived from "the weight".

δ Canis Majoris is a yellow giant of the spectral class F8 and has a surface temperature of 6200 Kelvin. It shines 50,000 times more than the sun and has about 200 times the solar radius. The star is about 1,600  light years from the solar system.

The IAU Working Group on Star Names (WGSN) has the historical proper names on July 20, 2016 Wezen defined as standardized proper name for this star.

See also

Web links

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. Bulletin of the IAU Working Group on Star Names, No. 1, July 2016. (PDF) Retrieved November 9, 2016 (English, 184 KiB).