Astronomy:TYC 8998-760-1

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Short description: Star in the constellation Musca
TYC 8998-760-1
File:First ever image of a multi-planet system around a Sun-like star.tif
TYC 8998-760-1, accompanied by two giant exoplanets, TYC 8998-760-1b and TYC 8998-760-1c[1]
Observation data
Equinox J2000.0]] (ICRS)
Constellation Musca
Right ascension  13h 25m 12.1263s[2]
Declination −64° 56′ 20.689″[2]
Apparent magnitude (V) 11.19[3]
Characteristics
Evolutionary stage Pre-main sequence[4]
Spectral type K3IV[5]
Astrometry
Radial velocity (Rv)12.84[6] km/s
Proper motion (μ) RA: −40.996[2] mas/yr
Dec.: −17.734[2] mas/yr
Parallax (π)10.6124 ± 0.0116[2] mas
Distance307.3 ± 0.3 ly
(94.2 ± 0.1 pc)
Details
Mass1.00[4] M☉
Radius1.01[2] R☉
Luminosity0.508[2] L☉
Surface gravity (log g)4.4[2] cgs
Temperature4,862[2] K
Age27[7] Myr
Other designations
Database references
SIMBADdata

TYC 8998-760-1 is a young star, about 27 Myr old, located 310 light years away in the constellation of Musca, with a mass 1.00±0.02 times the Sun.

Planetary system

There are two giant bodies orbiting the star. The European Southern Observatory's Very Large Telescope photographed the two bodies using its SPHERE instrument, producing the first direct image of multiple bodies orbiting a Sun-like star.[1][8]

The TYC 8998-760-1 planetary system[7][4][9]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(years) 		Eccentricity Inclination Radius
b 21.8±3 MJ 162 4,500 0 (assumed) — 3.0+0.2−0.7 RJ
c 7.2±0.7 MJ 320 5,700 0 (assumed) — 1.1+0.6−0.3 RJ

TYC 8998-760-1 b

TYC 8998-760-1 b is a body which has a mass 21.8 times that of Jupiter (most likely making it a brown dwarf), and a radius of 3 RJ. It orbits at a distance of 162 AU (2.42×1010 km; 1.51×1010 mi), or slightly more than 5 times the Neptune-Sun distance.[4][10][7] In July 2021, astronomers reported the detection, for the first time, of an isotope in the atmosphere of an exoplanet; more specifically, the isotope Carbon-13 (C13) was found in the atmosphere.[11][12]

TYC 8998-760-1 c

TYC 8998-760-1 c is a body with a mass of 7.2 MJ, and orbits at 320 AU (4.8×1010 km; 3.0×1010 mi), or slightly more than 11 times the Neptune-Sun distance.[4][7]

References

  1. ↑ 1.0 1.1 ESO/Bohn (22 July 2020). "First ever image of a multi-planet system around a Sun-like star (uncropped, with annotations)". European Southern Observatory. Archived from the original on 24 July 2020. https://web.archive.org/web/20200724161316/https://www.eso.org/public/images/eso2011b/. Retrieved 24 July 2020. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ Høg, E. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. Bibcode: 2000A&A...355L..27H. 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 Bohn, Alexander (22 July 2020). "Two Directly Imaged, Wide-orbit Giant Planets around the Young, Solar Analog TYC 8998-760-1". The Astrophysical Journal Letters 898 (1): L16. doi:10.3847/2041-8213/aba27e. Bibcode: 2020ApJ...898L..16B. 
  5. ↑ "TYC 8998-760-1". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=TYC+8998-760-1. 
  6. ↑ Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  7. ↑ 7.0 7.1 7.2 7.3 Wood, Mackenna L. et al. (2023). "TESS Hunt for Young and Maturing Exoplanets (THYME). IX. A 27 Myr Extended Population of Lower Centaurus Crux with a Transiting Two-planet System". The Astronomical Journal 165 (3): 85. doi:10.3847/1538-3881/aca8fc. Bibcode: 2023AJ....165...85W. 
  8. ↑ Wall, Mike (22 July 2020). "Multiplanet system around sunlike star photographed for 1st time ever - The two newly imaged planets are huge — 14 and 6 times more massive than Jupiter.". Space.com. https://www.space.com/multiplanet-system-sun-like-star-first-photo.html. Retrieved 22 July 2020. 
  9. ↑ Planet TYC 8998-760-1 b at exoplanets.eu
  10. ↑ "Astronomers Directly Image Two Giant Exoplanets around Young Sun-Like Star | Astronomy | Sci-News.com" (in en-US). http://www.sci-news.com/astronomy/directly-imaged-multi-planet-system-young-sun-like-star-08665.html. 
  11. ↑ Starr, Michelle (14 July 2021). "Isotopes Detected in The Atmosphere of an Exoplanet For The First Time". ScienceAlert. https://www.sciencealert.com/for-the-first-time-isotopes-have-been-detected-in-the-atmosphere-of-an-exoplanet. Retrieved 14 July 2021. 
  12. ↑ Zhang, Yapeng (14 July 2021). "The 13CO-rich atmosphere of a young accreting super-Jupiter". Nature 595 (7867): 370–372. doi:10.1038/s41586-021-03616-x. ISSN 0028-0836. PMID 34262209. Bibcode: 2021Natur.595..370Z. https://www.nature.com/articles/s41586-021-03616-x. Retrieved 14 July 2021. 



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