HD 108147 b

Last updated
HD 108147 b / Tumearandu
HD 108147 b (Celestia).jpg
The exoplanet HD 108147 b (min mass ~0.4 MJ) rendered by Celestia
Discovery
Discovered by Pepe, Mayor,
Galland et al.
Discovery site La Silla Observatory, Chile
Discovery dateApril 15, 2000 [1]
Doppler spectroscopy
(CORALIE)
Orbital characteristics
0.104 AU (15,600,000 km)
Eccentricity 0.498 ± 0.025
10.901 ± 0.001 d
2,451,591.6 ± 0.1
318 ± 3.03
Semi-amplitude 25.1 ± 6.1
Star HD 108147

    HD 108147 b, also named Tumearandu, is a gas giant exoplanet with a minimum mass about half that of Jupiter. It orbits the star in a very tight "torch orbit". The distance between the planet and the star is only a tenth of the distance between Earth and the Sun (0.1AU). [2] A number of such worlds are known to exist, but the eccentricity of this planet is unusually high. Planets orbiting very close to their parent stars usually have round orbits because of the tidal forces between the bodies.

    Contents

    In December 2019, the International Astronomical Union announced the exoplanet will bear the name Tumearandu, after the popular character Tumé Arandú of the folklore of Paraguay. The name was a result of a contest ran in Paraguay by the Centro Paraguayo de Informaciones Astronómicas, along with the IAU100 NameExoWorlds 2019 global contest. [3]

    See also

    Related Research Articles

    <span class="mw-page-title-main">HD 49674</span> Star in the constellation Auriga

    HD 49674 is a solar-type star with an exoplanetary companion in the northern constellation of Auriga. It has an apparent visual magnitude of 8.10 and thus is an eighth-magnitude star that is too faint to be readily visible to the naked eye. The system is located at a distance of 140.6 light-years from the Sun based on parallax, and is drifting further away with a radial velocity of +12 km/s.

    HD 168746 is an 8th magnitude star in the constellation of Serpens. It is very similar to the Sun, a yellow dwarf star. It is not visible to the unaided eye, but is easily visible with binoculars or a small telescope. In 2000 a planet was announced orbiting it.

    <span class="mw-page-title-main">HD 108147</span> Star in the constellation of Crux

    HD 108147, also known as Tupã, is a 7th magnitude star in the constellation of Crux in direct line with and very near to the bright star Acrux or Alpha Crucis. It is either a yellow-white or yellow dwarf, slightly brighter and more massive than the Sun. The spectral type is F8 V or G0 V. The star is also younger than the Sun. Due to its distance, about 126 light years, it is too dim to be visible with unaided eye; with binoculars it is an easy target. However, due to its southerly location it is not visible in the northern hemisphere except for the tropics.

    HD 149026, also named Ogma, is a yellow subgiant star approximately 250 light-years from the Sun in the constellation of Hercules. An extrasolar planet is believed to orbit the star.

    Gamma Cephei Ab, formally named Tadmor, is an exoplanet approximately 45 light-years away in the constellation of Cepheus. The planet was confirmed to be in orbit around Gamma Cephei A in 2002, but was first suspected to exist around 1988.

    <span class="mw-page-title-main">Mu Arae b</span> Extrasolar planet in the constellation Ara

    Mu Arae b, often designated HD 160691 b, formally named Quijote, is an exoplanet orbiting the star Mu Arae of the constellation Ara.

    <span class="mw-page-title-main">Mu Arae e</span> Extrasolar planet in the constellation Ara

    Mu Arae e, also known as HD 160691 e, later named Sancho, is one of the four extrasolar planets orbiting the star Mu Arae of the constellation Ara.

    Mu Arae d, also known as HD 160691 d, formally named Rocinante, is an extrasolar planet orbiting the star Mu Arae of the constellation Ara.

    <span class="mw-page-title-main">Iota Draconis b</span> Extrasolar planet in the constellation Draco

    Iota Draconis b, formally named Hypatia (pronounced or ), is an exoplanet orbiting the K-type giant star Iota Draconis about 101.2 light-years (31 parsecs, or nearly 2.932×1014 km) from Earth in the constellation Draco. The exoplanet was found by using the radial velocity method, from radial-velocity measurements via observation of Doppler shifts in the spectrum of the planet's parent star. It was the first planet discovered orbiting a giant star.

    HD 104985, formally named Tonatiuh, is a solitary star with a exoplanetary companion in the northern constellation of Camelopardalis. The companion is designated HD 104985 b and named Meztli. This star has an apparent visual magnitude of 5.78 and thus is dimly visible to the naked eye under favorable seeing conditions. It is located at a distance of approximately 329 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −20 km/s.

    HD 221287 b, also known as Pipitea, is an exoplanet that orbits HD 221287, approximately 173 light years away in the constellation of Tucana. This planet has mass >3.12 MJ and orbits in a habitable zone at 1.25 AUs from the star, taking 1.25 years to orbit at 29.9 km/s around the star. Dominique Naef discovered this planet in early 2007 by using HARPS spectrograph located in Chile.

    HD 117618 b, named Noifasui by the IAU, is an exoplanet discovered orbiting the star HD 117618 in September 2004. The planet is a small gas giant less than a fifth the mass of Jupiter. It orbits close to its star in a very eccentric orbit.

    HD 130322 b is an exoplanet with a minimum mass slightly more than that of Jupiter. It orbits the star in a very close orbit distance being only a quarter that of Mercury from the Sun. It is thus a so-called "hot Jupiter". The planet orbits the star every 10 days 17 hours in a very circular orbit.

    HD 104985 b, also named Meztli, is an extrasolar planet approximately 97 parsecs (317 lys) from the SunThe 198-day period planet orbits the yellow giant star HD 104985 (Tonatiuh) at a distance of 0.78 AU. With a mass 61/3 times Jupiter it is a gas giant.

    HD 45350 b is an extrasolar planet located approximately 160 light-years away in the constellation of Auriga. It has a minimum mass about 1.79 times that of Jupiter. The mean distance of the planet from the star is more than the distance between Mars and the Sun, but the eccentricity of the orbit is nothing short of remarkable; at periastron the planet is as close to the star as Mercury is from the Sun, but at apastron it is 8 times further. No doubt seasons on the planet would be extreme.

    HD 49674 b, formally named Eburonia, is an extrasolar planet located approximately 134 light-years away in the constellation of Auriga, orbiting the star HD 49674. This planet was discovered orbiting the star in 2002. The planet is a gas giant and orbits extremely close to its star, which takes only 4.95 days to revolve.

    <span class="mw-page-title-main">14 Andromedae b</span> Extrasolar planet in Andromeda constellation

    14 Andromedae b, formally named Spe, is an exoplanet approximately 249 light years away in the constellation of Andromeda.

    <span class="mw-page-title-main">51 Pegasi b</span> Hot Jupiter exoplanet

    51 Pegasi b, officially named Dimidium, is an extrasolar planet approximately 50 light-years away in the constellation of Pegasus. It was the first exoplanet to be discovered orbiting a main-sequence star, the Sun-like 51 Pegasi, and marked a breakthrough in astronomical research. It is the prototype for a class of planets called hot Jupiters.

    HD 136418 b, also known by its proper name Awasis, is an extrasolar planet orbiting the G-type star HD 136418 approximately 320 light years away in the constellation Boötes It has a notable orbit, staying within the known habitable zone. It also has a star very similar in temperature as the Sun.

    <span class="mw-page-title-main">HD 95086 b</span> Exoplanet orbiting the young HD 95086

    HD 95086 b, formally named Levantes, is a confirmed, directly imaged exoplanet orbiting the young, 17 Myr A-class pre-main-sequence star HD 95086. It is roughly 5 times as massive as Jupiter and orbits about 70 AU away from the parent star. It was detected at thermal infrared wavelengths (3.8 μm) through direct imaging, using the NACO instrument on the VLT. A debris disk has been detected in this system at submillimeter wavelengths and has been resolved in the far-infrared from data obtained with the Herschel Space Observatory.

    References

    1. "Exoplanets Galore!" (Press release). Garching, Germany: European Southern Observatory. April 15, 2000. Retrieved December 30, 2012.
    2. Pepe, F.; et al. (2002). "The CORALIE survey for southern extra-solar planets VII. Two short-period Saturnian companions to HD 108147 and HD 168746". Astronomy and Astrophysics . 388 (2): 632–638. arXiv: astro-ph/0202457 . Bibcode:2002A&A...388..632P. doi:10.1051/0004-6361:20020433. S2CID   13942987.
    3. "NameExoWorlds Paraguay".{{cite journal}}: Cite journal requires |journal= (help)