The Delta of the Triangle ( δ of the Triangle , lat. Delta Trianguli ) is a spectrally binary star located in the constellation Triangle at a distance of about 35 light-years from us.
| δ Triangle | |||
|---|---|---|---|
| Star | |||
| Observational data ( Age J2000.0) | |||
| Right ascension | |||
| Declination | |||
| Distance | 35.3 ± 0.3 St. years old | ||
| Visible magnitude ( V ) | +4.84 | ||
| Constellation | Triangle | ||
| Astrometry | |||
| Radial velocity ( R v ) | -6.4 km / s | ||
| Own movement (μ) | RA: 1151.61 mas per year Dec: -246.36 mas per year | ||
| Parallax (π) | 92.20 mas | ||
| Absolute magnitude (V) | 4.67 | ||
| Specifications | |||
| Spectral class | G0.5 V / K4 V | ||
| Color Index ( B - V ) | 0.61 | ||
| Color Index ( U - B ) | 0.02 | ||
| physical characteristics | |||
| Weight | 1,09 M ☉ | ||
| Radius | 0.98 R ☉ | ||
| Temperature | 6000 K | ||
| Metallicity | 13-30% | ||
| Rotation | 10 km / s | ||
| |||
| Database Information | |||
| SIMBAD | |||
Content
Features
The Delta of the Triangle consists of two components rotating around a common center of mass at a distance of about 0.11 a. e. from each other. They complete a complete revolution in a circular orbit in 10.02 days [1] .
δ of Triangle A
Triangle A Delta belongs to the main sequence yellow dwarf class . This star has a mass and diameter of 109% and 98% solar, respectively [2] . Metallicity varies from 13 to 31% of the solar [3] . This component is more massive in the system.
δ Triangle In
This star is poorly understood. It is an orange dwarf of spectral class K4 V. However, researchers say that this is only an approximate estimate, since at the moment there is no powerful enough tool to confirm this for sure [1] .
Nearest star environment
According to the Yale catalog of bright stars [4] , the Triangle system δ belongs to the moving group of Zeta Hercules stars . The following star systems are within 20 light-years of the δ of the Triangle:
| Star | Spectral class | Distance, st. years old |
| LP 245-10 | MV | 1.8 |
| L 1305-10 | M4-6 V | 6.9 |
| HR 483 | G1.5 V / MV | 9.3 |
| BD + 47 612 | M1.5 Ve | 9.5 |
| θ Perseus | F7 V / M1 V | 10.0 |
| ι Perseus | G0 v | eleven |
| υ Andromeda | F7-8 V | eleven |
| μ Cassiopeia | G5 VIp / M V-VI | sixteen |
| BD + 37 783 | G5 v | 18 |
| Kappa¹ Kita | G5 ve | 20 |
Notes
- ↑ 1 2 Hummel, CA, Armstrong, JT, Buscher, DF, Mozurkewich, D., Quirrenbach, A., & Vivekanand, M. Orbits of Small Angular Scale Binaries Resolved with the Mark III Interferometer. (eng.) . Astronomical Journal v. 110, p. 376 (1995). Date of treatment February 28, 2009. Archived March 27, 2012.
- ↑ Johnson, HM & Wright, CD Predicted infrared brightness of stars within 25 parsecs of the sun. (eng.) . Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 53, Nov. 1983, p. 643-711. (Nov. 1983). Date of treatment February 28, 2009. Archived February 16, 2012.
- ↑ Cayrel de Strobel, G., Hauck, B., Francois, P., Thevenin, F., Friel, E., Mermilliod, M. A catalog of Fe / H determinations - 1991 edition. (eng.) . Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 95, no. 2, p. 273-336. (1992). Date of treatment February 28, 2009. Archived February 16, 2012.
- ↑ Yale Bright Star Catalog, 1991 5th Revised Edition (inaccessible link) . Archived on August 13, 2009.
See also
- Triangle constellation stars list