HD 187123

from Wikipedia, the free encyclopedia

Database links to HD 187123

Stern
HD 187123

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

Right ascension

19 ^h 46 ^m 58.11 ^s

+ 34 ° 25 ′ 10.3 ″

Apparent brightness

7.83 likes

Typing

Known exoplanets

2

G5 V

Radial velocity

(−17.1 ± 0.2) km / s

(20.72 ± 0.53) mas

distance

(157 ± 4) ly
(48.3 ± 1.2) pc

Visual absolute brightness M _vis

+4.4 mag

Proper movement

Rec. Share:

(+143.18 ± 0.39) mas / a

Dec. portion:

(−123.91 ± 0.48) mas / a

Physical Properties

1.1 M _☉

1.2 R _☉

Effective temperature

5700 K

Metallicity [Fe / H]

0.16

Age

approx. 5 bill. a

Other names
and catalog entries

Bonn survey	BD + 34 ° 3708
Henry Draper Catalog	HD 187123 [1]
Hipparcos catalog	HIP 97336 [2]
SAO catalog	SAO 68845 [3]
Tycho catalog	TYC 2664-550-1 [4]

annotation

↑ Estimated from apparent brightness and distance.

HD 187123 is a main sequence star belonging to spectral class G5 , orbited by at least two planets , HD 187123 b and HD 187123 c . Its mass is around 1.1 solar masses . Its two companions were discovered in 1998 through measurements of its radial velocity .

Web links

Individual evidence

↑ ^a ^b ^c Hipparcos catalog (ESA 1997)
↑ Pulkovo radial velocities for 35493 HIP stars
↑ ^a ^b ^c Hipparcos, the New Reduction (van Leeuwen, 2007)