HD 219077 is a star located in the constellation Toucan at a distance of about 95.7 light years from us. At least one planet orbits a star.
| HD 219077 | |||
|---|---|---|---|
| Star | |||
 HD 219077 by the artist | |||
| Observational data ( Age J2000.0 ) | |||
| Type of | Single star | ||
| Right ascension | |||
| Declination | |||
| Distance | 95.7 St. years (29.35 pc ) | ||
| Visible magnitude ( V ) | 6.12 [1] | ||
| Constellation | Toucan | ||
| Astrometry | |||
| Radial velocity ( R v ) | -31.3 [2] km / s | ||
| Own movement (μ) | RA: 476.56 [2] Dec: -425.40 [2] | ||
| Parallax (π) | 34.07 ± 0.37 [2] mas | ||
| Absolute magnitude (V) | 3.78 [1] | ||
| Specifications | |||
| Spectral class | G8V [2] | ||
| Color Index ( B - V ) | 0.787 [1] | ||
| physical characteristics | |||
| Weight | 1.05 ± 0.02 [1] M ☉ | ||
| Radius | 1.91 ± 0.03 [1] R ☉ | ||
| Age | 8.9 ± 0.3 billion [1] years | ||
| Temperature | 5362 ± 18 [1] K | ||
| Luminosity | 2.66 [1] L ☉ | ||
| Metallicity | [Fe / H] = - 0.13 ± 0.01 [1] | ||
| Rotation | 1.46 km / s -1 [1] | ||
| |||
| Database Information | |||
| SIMBAD | data | ||
| Sources: [2] | |||
Content
Features
HD 219077 - a star of 6.12 visible magnitude; for the first time in astronomical literature is mentioned in the catalog of Henry Draper , published at the beginning of the XX century . This is a fairly old (about 8.9 billion years old) yellow dwarf with a mass and radius of 1.05 and 1.91 solar . [1] The surface temperature of HD 219077 is about 5940 Kelvin . The luminosity of a star exceeds 2.66 times that of the sun.
Planet System
In 2012, a group of astronomers working with the CORALIE spectrograph announced the discovery [1] of the planet HD 219077 b in the system. It is a gas giant that is ten times more powerful than Jupiter . The planet orbits in a very elongated elliptical orbit at a distance of 6.22 AU from the parent star, making a complete revolution in 5501 days. The discovery of the planet was made by Doppler spectroscopy .
| Planet | Weight ( M J ) | Radius ( R J ) | Circulation period ( days ) | Semimajor axis orbits ( a.u. ) | Eccentricity orbits |
|---|---|---|---|---|---|
| b | 10.39 ± 0.09 | - | 5501 ± 130 | 6.22 ± 0.09 | 0.77 ± 0.003 |
Notes
- ↑ 1 2 3 4 5 6 7 8 9 10 11 12 M. Marmier, D. Ségransan, S. Udry, M. Mayor, F. Pepe, D. Queloz, C. Lovis, D. Naef, NC Santos, R. Alonso, S. Alves, S. Berthet, B. Chazelas, B.-O. Demory, X. Dumusque, A. Eggenberger, P. Figueira, M. Gillon, J. Hagelberg, M. Lendl, RA Mardling, D. Mégevand, M. Neveu, J. Sahlmann, D. Sosnowska, M. Tewes, AHMJ Triaud. The CORALIE survey for southern extrasolar planets XVII. New and updated long period and massive planets . Arxiv.org (Nov 27, 2012). Date of treatment March 4, 2013.
- ↑ 1 2 3 4 5 6 SIMBAD (English) . - HD 219077 in the SIMBAD database . Date of treatment March 3, 2013.
- ↑ 1 2 3 4 Gaia Data Release 2 - 2018.
See also
- Tucan constellation stars list