TYC 8998-760-1

from Wikipedia, the free encyclopedia
Star
TYC 8998-760-1
Image of the young star with its 2 planets
Image of the young star with its 2 planets
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Fly
Right ascension 13 h 25 m 12.13 s
declination -64 ° 56 ′ 20.7 ″
Apparent brightness 11.12 mag
Typing
B − V color index (+0.84) 
Spectral class K3 IV
Astrometry
Radial velocity (12.84 ± 1.43) km / s
parallax (10.54 ± 0.03)  mas
distance (309 ± 1)  ly
(95)  pc
Proper movement 
Rec. Share: (−40.90 ± 0.05)  mas / a
Dec. portion: (−17.79 ± 0.04)  mas / a
Physical Properties
Dimensions (1.00 ± 0.02)  M ☉
Luminosity

(0.46 ± 0.02)  L ☉

Effective temperature (4573 ± 10)  K.
Age (16.7 ± 1.4) mill.  A
Other names
and catalog entries
Tycho catalog TYC 8998-760-1 [1]
2MASS catalog 2MASS J13251211-6456207 [2]
Exo-Planet TCY 8998-760-1b - Artist's impression

TYC 8998-760-1 is a young, Sun-like star in the constellation Flies at a distance of about 310  light years . The star gained wider attention in 2020 as it was the first Sun-like star around which 2 exoplanets could be directly imaged .

admission

The system was captured using the SPHERE instrument on the Very Large Telescope of the European Southern Observatory . The 2 planets can be seen as bright points. The team was able to distinguish the planets from the background stars using the imaging technology.

system

The planetary system of TYC 8998-760-1 consists of at least 2 planets, which are both very unusual compared to those of the solar system . Both planets are significantly more massive than Jupiter and they are also very far away from their central star. For comparison: the most distant known planet of the solar system Neptune is at a distance of 30 AU , while these two objects are 160 and 320 AU away from their central star. Their long distance in combination with their relatively high luminosity makes these objects ideal for follow-up examinations, for example with the James Webb space telescope .

Planetary system
Planet
(order
from the star) 		Discovered Mass
( Jupiter masses ) 		Radius
( Jupiter radii ) 		Major semiaxis of
the railway
( AU ) 		Rotation time
( days ) 		eccentricity Orbit inclination
( degree )
b 2020 14 ± 3 3.0   + 0.2−0.7 162 - - -
c 2020 6 ± 1 1.1   +0.6−0.3 320 - - -

Individual evidence

  1. ↑ a b c d e f g TYC 8998-760-1. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on July 26, 2020 .
  2. ↑ a b c d Alexander Bohn et al .: The Young Suns Exoplanet Survey: Detection of a wide orbit planetary mass companion to a solar-type Sco-Cen member . In: Monthly Notices of the Royal Astronomical Society . 898, No. 1, December 9, 2019. arxiv : 1912.04284 . bibcode : 2020MNRAS.492..431B . doi : 10.1093 / mnras / stz3462 .
  3. ^ First ever image of a multi-planet system around a Sun-like star (uncropped, with annotations). ESO , accessed July 26, 2020 .
  4. ↑ Astronomers take photos of the young planetary system. In: Der Spiegel (online) . July 22, 2020, accessed July 26, 2020 .
  5. ↑ a b Alexander Bohn et al .: Two Directly Imaged, Wide-orbit Giant Planets around the Young, Solar Analog TYC 8998-760-1 . In: The Astrophysical Journal Letters . 898, No. 1, July 22, 2020. arxiv : 2007.10991 . doi : 10.3847 / 2041-8213 / aba27e .