| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 21h 13m 35.9901s [1] |
| Declination | +14° 41′ 21.7846″ [1] |
| Apparent magnitude (V) | 9.78 [2] |
| Characteristics | |
| Spectral type | K2V [3] |
| B−V color index | 1.611±0.218 |
| V−R color index | 0.68 [2] |
| R−I color index | 0.50 [2] |
| Astrometry | |
| Radial velocity (Rv) | −44.30±0.30 [1] km/s |
| Proper motion (μ) |
RA: 233.993±0.057
mas/
yr
[1] Dec.: −0.275±0.056 mas/ yr [1] |
| Parallax (π) | 20.2337 ± 0.0345 mas [1] |
| Distance | 161.2 ± 0.3
ly (49.42 ± 0.08 pc) |
| Absolute magnitude (MV) | 6.14 |
|
Absolute bolometric magnitude (Mbol) | 5.56 [3] |
| Details | |
| Mass | 0.82±0.02 [4] M☉ |
| Radius | 0.78±0.02 [4] R☉ |
| Luminosity | 0.32±0.01 [4] L☉ |
| Luminosity (bolometric) | 0.4786 [3] L☉ |
| Surface gravity (log g) | 4.57±0.03 [4] cgs |
| Temperature | 4,948±25 [4] K |
| Metallicity [Fe/H] | 0.10±0.07 [3] dex |
| Age | 6.9±4.2 [4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
BD+14 4559 is a star with an exoplanetary companion in the northern constellation of Pegasus. During the 2019 NameExoWorlds campaign, the star was named Solaris by Poland after a 1961 science fiction novel about an ocean-covered exoplanet by Polish writer Stanisław Lem. [6] With an apparent visual magnitude of 9.78, [2] the star is too faint to be viewed with the naked eye. The system is located at a distance of 161 light-years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −44 km/s. [1] It is a high proper motion star, [3] traversing the celestial sphere at an angular rate of 0.234″ yr−1. [7]
This is an ordinary K-type main sequence star with a stellar classification of K2V. [3] The age of the star is poorly constrained, but is estimated to be roughly seven billion years. It has 82% of the mass and 78% of the radius of the Sun. [4] The star is radiating 48% [3] of the net luminosity of the Sun from its photosphere at an effective temperature of 4,948 K. [4] It has a higher metallicity – the abundance of elements of higher atomic number than helium – compared to the Sun. [3]
Planetary system
On June 10, 2009, an exoplanet ( Pirx) was found in orbit by Niedzielski et al. using the Hobby-Eberly Telescope. [3] It has a minimum mass of one and a half Jupiter masses (MJ). The orbit of this object is highly eccentric and it spends 65% of its orbital period in the star's habitable zone. [8] A 2020 analysis of data from the Gaia mission has set a 3-sigma upper limit to its mass of 49.83 MJ. [9] There may be an undetected second planet orbiting the star, however this is unconfirmed. [3]
| Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b / Pirx | >1.52 ± 0.19 MJ | 0.777 | 268.94 ± 0.99 | 0.29 ± 0.03 | >1.769 ° | — |
| c (unconfirmed) | >2.4 MJ | >2.3 | 800? | — | — | — |
See also
References
- ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. S2CID 119257644.
- ^ a b c d e f g h i j k Niedzielski, A.; et al. (2009). "Substellar-mass Companions to the K-dwarf BD+14 4559 and the K-giants HD 240210 and BD+20 2457". The Astrophysical Journal. 707 (1): 768–777. arXiv: 0906.1804. Bibcode: 2009ApJ...707..768N. doi: 10.1088/0004-637X/707/1/768. S2CID 16877069.
- ^ a b c d e f g h Bonfanti, A.; et al. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics. 585: 14. arXiv: 1511.01744. Bibcode: 2016A&A...585A...5B. doi: 10.1051/0004-6361/201527297. S2CID 53971692. A5.
- ^ "9 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-11-12.
- ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
- ^ Lépine, Sébastien; Shara, Michael M. (March 2005). "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)". The Astronomical Journal. 129 (3): 1483–1522. arXiv: astro-ph/0412070. Bibcode: 2005AJ....129.1483L. doi: 10.1086/427854. S2CID 2603568.
- ^ Hinkel, Natalie R.; Kane, Stephen R. (September 2013). "Habitability of Exomoons at the Hill or Tidal Locking Radius". The Astrophysical Journal. 774 (1): 10. arXiv: 1307.4760. Bibcode: 2013ApJ...774...27H. doi: 10.1088/0004-637X/774/1/27. S2CID 5072506. 27.
- ^ a b Kiefer, F.; et al. (2021). "Determining the true mass of radial-velocity exoplanets with Gaia". Astronomy & Astrophysics. 645: A7. arXiv: 2009.14164. Bibcode: 2021A&A...645A...7K. doi: 10.1051/0004-6361/202039168. S2CID 221995447.
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 21h 13m 35.9901s [1] |
| Declination | +14° 41′ 21.7846″ [1] |
| Apparent magnitude (V) | 9.78 [2] |
| Characteristics | |
| Spectral type | K2V [3] |
| B−V color index | 1.611±0.218 |
| V−R color index | 0.68 [2] |
| R−I color index | 0.50 [2] |
| Astrometry | |
| Radial velocity (Rv) | −44.30±0.30 [1] km/s |
| Proper motion (μ) |
RA: 233.993±0.057
mas/
yr
[1] Dec.: −0.275±0.056 mas/ yr [1] |
| Parallax (π) | 20.2337 ± 0.0345 mas [1] |
| Distance | 161.2 ± 0.3
ly (49.42 ± 0.08 pc) |
| Absolute magnitude (MV) | 6.14 |
|
Absolute bolometric magnitude (Mbol) | 5.56 [3] |
| Details | |
| Mass | 0.82±0.02 [4] M☉ |
| Radius | 0.78±0.02 [4] R☉ |
| Luminosity | 0.32±0.01 [4] L☉ |
| Luminosity (bolometric) | 0.4786 [3] L☉ |
| Surface gravity (log g) | 4.57±0.03 [4] cgs |
| Temperature | 4,948±25 [4] K |
| Metallicity [Fe/H] | 0.10±0.07 [3] dex |
| Age | 6.9±4.2 [4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
BD+14 4559 is a star with an exoplanetary companion in the northern constellation of Pegasus. During the 2019 NameExoWorlds campaign, the star was named Solaris by Poland after a 1961 science fiction novel about an ocean-covered exoplanet by Polish writer Stanisław Lem. [6] With an apparent visual magnitude of 9.78, [2] the star is too faint to be viewed with the naked eye. The system is located at a distance of 161 light-years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −44 km/s. [1] It is a high proper motion star, [3] traversing the celestial sphere at an angular rate of 0.234″ yr−1. [7]
This is an ordinary K-type main sequence star with a stellar classification of K2V. [3] The age of the star is poorly constrained, but is estimated to be roughly seven billion years. It has 82% of the mass and 78% of the radius of the Sun. [4] The star is radiating 48% [3] of the net luminosity of the Sun from its photosphere at an effective temperature of 4,948 K. [4] It has a higher metallicity – the abundance of elements of higher atomic number than helium – compared to the Sun. [3]
Planetary system
On June 10, 2009, an exoplanet ( Pirx) was found in orbit by Niedzielski et al. using the Hobby-Eberly Telescope. [3] It has a minimum mass of one and a half Jupiter masses (MJ). The orbit of this object is highly eccentric and it spends 65% of its orbital period in the star's habitable zone. [8] A 2020 analysis of data from the Gaia mission has set a 3-sigma upper limit to its mass of 49.83 MJ. [9] There may be an undetected second planet orbiting the star, however this is unconfirmed. [3]
| Companion (in order from star) |
Mass |
Semimajor axis ( AU) |
Orbital period ( days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b / Pirx | >1.52 ± 0.19 MJ | 0.777 | 268.94 ± 0.99 | 0.29 ± 0.03 | >1.769 ° | — |
| c (unconfirmed) | >2.4 MJ | >2.3 | 800? | — | — | — |
See also
References
- ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. S2CID 119257644.
- ^ a b c d e f g h i j k Niedzielski, A.; et al. (2009). "Substellar-mass Companions to the K-dwarf BD+14 4559 and the K-giants HD 240210 and BD+20 2457". The Astrophysical Journal. 707 (1): 768–777. arXiv: 0906.1804. Bibcode: 2009ApJ...707..768N. doi: 10.1088/0004-637X/707/1/768. S2CID 16877069.
- ^ a b c d e f g h Bonfanti, A.; et al. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics. 585: 14. arXiv: 1511.01744. Bibcode: 2016A&A...585A...5B. doi: 10.1051/0004-6361/201527297. S2CID 53971692. A5.
- ^ "9 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-11-12.
- ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
- ^ Lépine, Sébastien; Shara, Michael M. (March 2005). "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)". The Astronomical Journal. 129 (3): 1483–1522. arXiv: astro-ph/0412070. Bibcode: 2005AJ....129.1483L. doi: 10.1086/427854. S2CID 2603568.
- ^ Hinkel, Natalie R.; Kane, Stephen R. (September 2013). "Habitability of Exomoons at the Hill or Tidal Locking Radius". The Astrophysical Journal. 774 (1): 10. arXiv: 1307.4760. Bibcode: 2013ApJ...774...27H. doi: 10.1088/0004-637X/774/1/27. S2CID 5072506. 27.
- ^ a b Kiefer, F.; et al. (2021). "Determining the true mass of radial-velocity exoplanets with Gaia". Astronomy & Astrophysics. 645: A7. arXiv: 2009.14164. Bibcode: 2021A&A...645A...7K. doi: 10.1051/0004-6361/202039168. S2CID 221995447.
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Star clusters |
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