HD 3167 (original) (raw)
HD 3167 è una nana arancione, con massa pari a 0,94 volte quella del Sole, situata nella costellazione dei Pesci a 154,4 anni luce di distanza dal sistema solare. Nel sistema planetario di HD 3167 si è scoperta per la prima volta una grande inclinazione tra le orbite dei tre pianeti in uno stesso sistema, con il più interno che ha un'orbita equatoriale e gli altri due un'orbita polare.
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| dbo:abstract | HD 3167 is a single, orange-hued star in the zodiac constellation of Pisces that hosts a system with three exoplanets. The star is too faint to be seen with the naked eye, having an apparent visual magnitude of 8.97. The distance to HD 3167 can be determined from its annual parallax shift of 21.1363 mas as measured by the Gaia space observatory, yielding a range of 154 light years. It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.204″ per year. Since it was first photographed during the Palomar observatory sky survey in 1953, it had moved over 12.5″ by 2017. The star is moving away from the Earth with an average heliocentric radial velocity of +19.5 km/s. This is an ordinary K-type main-sequence star with a stellar classification of K0 V and no significant variability. The star has 86% of the mass of the Sun and 86% of the Sun's radius. It is a chromospherically inactive star and is radiating 56% of the Sun's luminosity from its photosphere at an effective temperature of 5,261 K. The spin of the star displays a relatively low projected rotational velocity of around 1.7 km/s. It has a near solar metallicity – a term astronomers use for the proportion of elements other than hydrogen and helium in a stellar atmosphere. In October 2021, astronomers reported that the orbits of the detected exoplanets hosted by the star are oddly unusual: two planets (HD 3167 c; HD 3167 d) revolve around the star on polar orbits, i.e. orbits that pass over the poles of the star, whereas the third planet (HD 3167 b) orbits around the equator of the star instead. (en) HD 3167 è una nana arancione, con massa pari a 0,94 volte quella del Sole, situata nella costellazione dei Pesci a 154,4 anni luce di distanza dal sistema solare. Nel sistema planetario di HD 3167 si è scoperta per la prima volta una grande inclinazione tra le orbite dei tre pianeti in uno stesso sistema, con il più interno che ha un'orbita equatoriale e gli altri due un'orbita polare. (it) HD 3167 — звезда, которая находится в созвездии Рыбы на расстоянии около 149 световых лет от нас. Вокруг звезды обращаются, как минимум, две планеты. (ru) HD 3167 är en ensam stjärna belägen i den mellersta delen av stjärnbilden Fiskarna. Den har en skenbar magnitud av ca 8,97 och kräver åtminstone en stark handkikare eller ett mindre teleskop för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2 på ca 21,1 mas, beräknas den befinna sig på ett avstånd på ca 154 ljusår (ca 47 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 20 km/s. Den har en relativt stor egenrörelse och rör sig över himlavalvet med en vinkelhastighet av 0,204 bågsekunder per år. Sedan den först fotograferades under the Palomar observatory sky survey hade den rört sig över 12,5 bågsekunder fram till år 2017. (sv) |
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| dbp:absmagV | 5.670000 (xsd:double) |
| dbp:appmagV | 8.970000 (xsd:double) |
| dbp:class | K0 V (en) |
| dbp:constell | dbr:Pisces_(constellation) |
| dbp:eccentricity | 0 (xsd:integer) < 0.267 (en) < 0.36 (en) < 0.60 (en) |
| dbp:epoch | J2000 (en) |
| dbp:exoplanet | c (en) d (en) b (en) e (en) |
| dbp:luminosity | 0.560000 (xsd:double) |
| dbp:massEarth | ≥ (en) ≥ 9.74 (en) |
| dbp:pError | 0.018700 (xsd:double) |
| dbp:parallax | 21.136300 (xsd:double) |
| dbp:period | 29.875208 (xsd:double) 102.090000 (xsd:double) |
| dbp:propMoDec | −173.334 (en) |
| dbp:propMoRa | +107.569 (en) |
| dbp:semimajor | 0.404800 (xsd:double) |
| dbp:type | Main sequence (en) |
| dbp:variable | Constant (en) |
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| rdf:type | owl:Thing dbo:Place dbo:Location schema:Place dbo:CelestialBody dbo:Star |
| rdfs:comment | HD 3167 è una nana arancione, con massa pari a 0,94 volte quella del Sole, situata nella costellazione dei Pesci a 154,4 anni luce di distanza dal sistema solare. Nel sistema planetario di HD 3167 si è scoperta per la prima volta una grande inclinazione tra le orbite dei tre pianeti in uno stesso sistema, con il più interno che ha un'orbita equatoriale e gli altri due un'orbita polare. (it) HD 3167 — звезда, которая находится в созвездии Рыбы на расстоянии около 149 световых лет от нас. Вокруг звезды обращаются, как минимум, две планеты. (ru) HD 3167 är en ensam stjärna belägen i den mellersta delen av stjärnbilden Fiskarna. Den har en skenbar magnitud av ca 8,97 och kräver åtminstone en stark handkikare eller ett mindre teleskop för att kunna observeras. Baserat på parallax enligt Gaia Data Release 2 på ca 21,1 mas, beräknas den befinna sig på ett avstånd på ca 154 ljusår (ca 47 parsek) från solen. Den rör sig bort från solen med en heliocentrisk radialhastighet på ca 20 km/s. Den har en relativt stor egenrörelse och rör sig över himlavalvet med en vinkelhastighet av 0,204 bågsekunder per år. Sedan den först fotograferades under the Palomar observatory sky survey hade den rört sig över 12,5 bågsekunder fram till år 2017. (sv) HD 3167 is a single, orange-hued star in the zodiac constellation of Pisces that hosts a system with three exoplanets. The star is too faint to be seen with the naked eye, having an apparent visual magnitude of 8.97. The distance to HD 3167 can be determined from its annual parallax shift of 21.1363 mas as measured by the Gaia space observatory, yielding a range of 154 light years. It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.204″ per year. Since it was first photographed during the Palomar observatory sky survey in 1953, it had moved over 12.5″ by 2017. The star is moving away from the Earth with an average heliocentric radial velocity of +19.5 km/s. (en) |
| rdfs:label | HD 3167 (en) HD 3167 (it) HD 3167 (ja) HD 3167 (ru) HD 3167 (sv) |
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