Hee dragon

χ Dragon
χ Dragon
	Star
Observational data; ( Epoch J2000.0 )
Right ascension
Declination
Distance	26.3 ± 0.1 st. years (8.06 ± 0.03 pc )
Visible magnitude ( V )	3.68 / 5.67
Constellation	The Dragon
Astrometry
Radial velocity ( R v )	32.5 km / s
Proper motion (μ)	RA: 531.02 mas per year; Dec: -351,60 mas per year
Parallax (π)	124.11 ± 0.48 mas
Absolute magnitude (V)	4.16
Specifications
Spectral class	A: F7V ; B: K0V
Other designations
	Chi Draconis, Batentaban Borealis, 44 Dra, HR 6927, Gl 713 A, HIP 89937, HD 170153, BD + 72 839, SAO 9087, FK5 695, LHS 3379, LTT 15438 LFT 1413 ;
Information in databases
SIMBAD	data
	Sources:

Chi Draconis , ( eng. Chi Draconis ) is a double star , which is located in the constellation Dragon at a distance of about 26.3 light years from us.

Characteristics

Components A and B in the Dragon χ system belong to the main sequence stars; they revolve around a common center of mass at an average distance of 0.991 a to each other . is. with apoaster of 0.6 a. e. and periastrom 1.4 a. that is, along an extended elliptical orbit (e = 0.414). ^[2] They make a full turn in 280.5 days ; the plane of their orbit is rotated 74.8 ° with respect to the earth observer.

χ Dragon A

The main component of the system is a yellow-white dwarf, slightly larger than our Sun in mass and size. Its diameter and mass are equivalent to 1.2 and 1.03 solar respectively, and the luminosity is approximately 1.86 solar. ^[3]

χ Dragon B

The second component is an orange dwarf - a dimmer and less massive star. Its mass is 75% of the mass of the Sun , and its luminosity is about 29% of the sun. ^[3]

Star's Neighborhood

The following star systems are within 10 light-years from χ of the Dragon:

Star	Spectral class	Distance, sv. years old
LP 71-165	M4,5 V	3.9
G 227-29	MV	5.0
AC + 65 6955	M3 V	6.1
LP 44-113	DXP9 / VII	6.4
σ dragon	K0 V	7.9
BD + 61 2068	M0 V / MV	8.2

Notes

↑ SIMBAD (English) . - χ Dragon in the SIMBAD database . The appeal date is November 3, 2009
↑ Pourbaix, D. Resolved double-lined spectroscopic binaries: A hypothetical parallaxes and stellar masses (English) . Astronomy and Astrophysics Supplement, v.145, p.215-222 (08/2000). The date of circulation is November 5, 2009. Archived April 10, 2012.
↑ ¹ ² Tomkin, J., McAlister, HA, Hartkopf, WI, & Fekel, FC Spectroscopic binary CHI Draconis (English) . Astronomical Journal (ISSN 0004-6256), vol. 93, May 1987, p. 1236-1244. (May 1987). The appeal date is November 5, 2009. Archived April 10, 2012.

Links

χ Dragon on the Solstation website

[simbad-1] SIMBAD (English) . - χ Dragon in the SIMBAD database . The appeal date is November 3, 2009

[2] Pourbaix, D. Resolved double-lined spectroscopic binaries: A hypothetical parallaxes and stellar masses (English) . Astronomy and Astrophysics Supplement, v.145, p.215-222 (08/2000). The date of circulation is November 5, 2009. Archived April 10, 2012.

[Tomkin,_J.-3] ¹ ² Tomkin, J., McAlister, HA, Hartkopf, WI, & Fekel, FC Spectroscopic binary CHI Draconis (English) . Astronomical Journal (ISSN 0004-6256), vol. 93, May 1987, p. 1236-1244. (May 1987). The appeal date is November 5, 2009. Archived April 10, 2012.