HR 4523

HR 4523
HR 4523
	Star
Observational data; ( Age J2000.0 )
Right ascension
Declination
Distance	30.1 ± 0.2 St. years
Visible magnitude ( V )	4.89 / 15
Constellation	Centaurus
Astrometry
Radial velocity ( R v )	15.3 km / s
Own movement (μ)	RA: -1531.62 mas per year; Dec: 403.48 mas per year
Parallax (π)	108.23 mas
Characteristics
Spectral class	G5 V / MV
Color Index ( B - V )	0.66
Color Index ( U - B )	0.10
Variability	absent
physical characteristics
Weight	0.6 / 0.07 M ☉
Radius	0.96 / 0.15 R ☉
Age	9 billion years
Temperature	5643 /? K
Metallicity	-0.28 /?
Other designations
	Gliese 442, Gl 442, HIP 57443, HD 102365, CD-39 7301, CP (D) -39 5265, SAO 223020, LHS 311, LTT 4373, LPM 399, LFT 848 ;
Database Information
SIMBAD

HR 4523 ( HD 102365 ) is a binary star located in the constellation Centaurus at a distance of about 30 light-years from Earth .

Content

1 Features
- 1.1 HR 4523 A
- 1.2 HR 4523 V
2 Nearest star surroundings
3 notes
4 See also
5 Links

Features

Both components of the system belong to the class of dwarfs of the main sequence and belong to the vast family of stars of the galactic disk . ^[2] Circulate components around a common center of mass at a distance of 194 a. e. from each other. ^[3]

HR 4523 A

The main, more massive and bright component is a yellow dwarf , in its characteristics resembling our Sun. Its mass is 60–80% of the mass of the Sun ^[4] , but it is possible that the mass is absolutely equal to the sun. The diameter and luminosity of the dwarf are approximately 96% and 82% solar, respectively. Spectral analysis showed that the composition of HR 4523 A contains from 20% to 33% of chemical elements, heavier than hydrogen , compared with the Sun. ^[5] The surface temperature is approximately 5643 degrees Kelvin . ^{[6] The} age of the star is estimated at 9 billion years.

HR 4523 In

The second component is poorly understood. It belongs to the class of cold dull red dwarfs . Its mass should not exceed 7% of the mass of the Sun, its diameter should not exceed 15% of the sun, and its luminosity is approximately 7/100000 of solar luminosity.

Nearest star environment

HR 4523 belongs to the moving group of stars of the Indian Indian . ^[4] The following star systems are within 20 light-years of HR 4523 :

Star	Spectral class	Distance, st. years
L 396-7	M3.5 V	4.3
CD-31 911	M2 V	4.4
CD-32 8179	K0 V / MV	4.4
CD-51 5974	K0-M0 V-VI	6.3
L 399-68	M3.5 V	7.3
CD-26 8883	K4-5 V /?	7.8
CD-51 6859	M3 v	7.9
L471-42	M4 v	8.2
HIP 50798	?	9.7
Gliese 370	K5 V	fourteen
61 Virgin	G5-6 V	fifteen

Notes

↑ ¹ ² ³ ⁴ Collaboration G. Gaia DR2 - 2018 .-- T. 1345. - P. 0.
<a href=" https://wikidata.org/wiki/Track:Q51905050 "> </a>
↑ Hearnshaw, JB The abundances of the elements in the oldest disk stars . Memoirs of the Royal Astronomical Society, Vol. 77, p. 55 (00/1972). Date of treatment April 10, 2009. Archived March 29, 2012.
↑ Poveda, A., Herrera, MA, Allen, C., Cordero, G., & Lavalley, C. Statistical studies of visual double and multiple stars. II. A catalog of nearby wide binary and multiple systems. (eng.) . Rev. Mex. Astron. Astrofis., Vol. 28, No. 1, p. 43 - 89 (1994). Date of treatment April 10, 2009. Archived March 29, 2012.
↑ ¹ ² Kovacs, N. & Foy, R. A detailed analysis of three stars in the Eggen's Epsilon INDI moving group . Astronomy and Astrophysics, vol. 68, no. 1-2, Aug. 1978, p. 27-31. (1978). Date of treatment April 10, 2009. Archived March 29, 2012.
↑ Cayrel de Strobel, G., Hauck, B., Francois, P., Thevenin, F., Friel, E., Mermilliod, M. A catalog of Fe / H determinations - 1991 edition . Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 95, no. 2, p. 273-336. (09/1992). Date of treatment April 10, 2009. Archived March 29, 2012.
↑ Porto de Mello, Gustavo; del Peloso, Eduardo F .; Ghezzi, Luan. Astrobiologically Interesting Stars Within 10 Parsecs of the Sun. Astrobiology, Volume 6, Issue 2, pp. 308-331. (04/2006). Date of treatment April 10, 2009. Archived March 29, 2012.

Links

[_7e592bedcad65317-1] ¹ ² ³ ⁴ Collaboration G. Gaia DR2 - 2018 .-- T. 1345. - P. 0.
<a href=" https://wikidata.org/wiki/Track:Q51905050 "> </a>

[2] Hearnshaw, JB The abundances of the elements in the oldest disk stars . Memoirs of the Royal Astronomical Society, Vol. 77, p. 55 (00/1972). Date of treatment April 10, 2009. Archived March 29, 2012.

[3] Poveda, A., Herrera, MA, Allen, C., Cordero, G., & Lavalley, C. Statistical studies of visual double and multiple stars. II. A catalog of nearby wide binary and multiple systems. (eng.) . Rev. Mex. Astron. Astrofis., Vol. 28, No. 1, p. 43 - 89 (1994). Date of treatment April 10, 2009. Archived March 29, 2012.

[A_detailed_analysis_of_three_stars_in_the_Eggen's_Epsilon_INDI_moving_group-4] ¹ ² Kovacs, N. & Foy, R. A detailed analysis of three stars in the Eggen's Epsilon INDI moving group . Astronomy and Astrophysics, vol. 68, no. 1-2, Aug. 1978, p. 27-31. (1978). Date of treatment April 10, 2009. Archived March 29, 2012.

[5] Cayrel de Strobel, G., Hauck, B., Francois, P., Thevenin, F., Friel, E., Mermilliod, M. A catalog of Fe / H determinations - 1991 edition . Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 95, no. 2, p. 273-336. (09/1992). Date of treatment April 10, 2009. Archived March 29, 2012.

[6] Porto de Mello, Gustavo; del Peloso, Eduardo F .; Ghezzi, Luan. Astrobiologically Interesting Stars Within 10 Parsecs of the Sun. Astrobiology, Volume 6, Issue 2, pp. 308-331. (04/2006). Date of treatment April 10, 2009. Archived March 29, 2012.