Lambda Coronae Borealis (HIP 78012)

Lambda Coronae Borealis is a white subgiant star in the constellation Corona Borealis. At 135 light years away, it shines at an apparent visual magnitude of 5.43. Lambda Coronae Borealis is the primary component of a multiple-star system. The star's age is estimated to be 1.6 billion years but is certainly no less than 1.5 billion years and no greater than 1.7 billion years. The iron abundance of Lambda Coronae Borealis is +0.01 (102.3% of the Sun). It is moving through the Galaxy at a speed of 20.4 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,100 and 35,900 light years from the center of the Galaxy. It will come closest to the Sun 1.1 million years from now when it will brighten to magnitude 5.01 from a distance of 111 light years.

Sky position: RA 15h 55.8m, Dec +37░ 57'

Common designations: Lambda Coronae Borealis, 12 Coronae Borealis, HIP 78012, HD 142908, HR 5936

Moon Calendar Poster

Outstanding Lunar Images


Brightest stars in Corona Borealis:
(list all)

9

|    4.79

)   Kappa Coronae Borealis

10

|    4.86

)   Xi Coronae Borealis

11

|    4.98

)   Iota Coronae Borealis

12

|    4.99

)   Eta Coronae Borealis

13

|    5.14

)   Mu Coronae Borealis

14

|    5.20

)   Nu-1 Coronae Borealis

15

|    5.23

)   Sigma Coronae Borealis

16

|    5.39

)   Rho Coronae Borealis

17

|    5.40

)   Nu-2 Coronae Borealis

18

|    5.43

)   Lambda Coronae Borealis

19

|    5.51

)   Omicron Coronae Borealis

20

|    5.57

)   Pi Coronae Borealis

21

|    5.61

)   HR 5957

22

|    5.62

)   HR 6046

23

|    5.79

)   HR 5983

24

|    5.80

)   Upsilon Coronae Borealis

25

|    5.89

)   R Coronae Borealis

Location of Lambda Coronae Borealis circled
Map detail from Stars of the Northern Hemisphere
Hover over other bright stars to identify or click to jump.


Galactic Orbit of Lambda Coronae Borealis

(compared to the Sun)

Eccentricity: 19.7% vs. 16.0%

Angle φ : -2.7░ vs. 26.0░

Semi-major axis : 9,191 pc vs. 8,686 pc

Semi-minor axis: 9,012 pc vs. 8,574 pc

Focus-to-center: 1,806 pc vs. 1,388 pc

Semilatus rectum : 8,837 pc vs. 8,464 pc

Perigalacticon: 7,386 pc vs. 7,297 pc

Apogalacticon: 10,997 pc vs. 10,074 pc
 


Some Tabulated XHIP Data for Lambda Coronae Borealis
(see also: SIMBAD)

Astrometry
2007A&A...474..653V
  Position Proper Motion
Right Ascension: 238.94818806░ ▒0.18 mas 29.29 ▒0.19 mas/yr.
Declination: 37.94676331░ ▒0.19 mas 80.13 ▒0.23 mas/yr.
     
Galactic Longitude: 60.60282082░ 79.18 mas/yr.
Galactic Latitude: 50.09836277░ -31.77 mas/yr.

Parallax: 24.06 ▒ 0.24 mas


Spectrography

Spectral Type: F2IV-V 2001AJ....121.2148G.

Radial Velocity: -11.60 ▒0.80 km/s [A rating] 2006AstL...32..759G.

Iron Abundance [Fe/H]: 0.01 ▒0.04 dex  2009A&A...501..941H, 1990ApJ...354..310B.
 



Photometry
 
band magnitude Abs. Mag.
U
B 5.78 2.69
V 5.43 2.34
R
I 5.06 1.97
J
H
K

  B-V: +0.35       V-I: +0.37


Derivations

Heliocentric distance: 41.56 pc (1.0% margin of error)

Galactocentric distance: 7,387 pc

Transverse velocity: 16.8 km/s

3D heliocentric position and motion:

toward:   

Galactic center Galactic rotation North Galactic Pole
Position ( X, Y, Z) 13.1 pc 23.2 pc 31.9 pc
Velocity (U, V, W) -14.9 km/s 5.4 km/s -12.9 km/s

< Previous | HIP  78012 | Next >