TOI-1136

Last updated
TOI-1136
Observation data
Epoch J2000        Equinox J2000
Constellation Draco [1]
Right ascension 12h 48m 44.37261s [2]
Declination +64° 51′ 19.1475″ [2]
Apparent magnitude  (V)9.534 [3]
Characteristics
Evolutionary stage Main sequence
Spectral type G5 [4]
Apparent magnitude  (B)10.16±0.03 [4]
Apparent magnitude  (V)9.534±0.003 [3]
Apparent magnitude  (G)9.376±0.003 [2]
Apparent magnitude  (J)8.363±0.020 [4]
Apparent magnitude  (H)8.088±0.018 [4]
Apparent magnitude  (K)8.034±0.021 [4]
Astrometry
Radial velocity (Rv)7.51±0.20 [2]  km/s
Proper motion (μ)RA: 1.216  mas/yr [2]
Dec.: -10.045  mas/yr [2]
Parallax (π)11.8236 ± 0.0108  mas [2]
Distance 275.9 ± 0.3  ly
(84.58 ± 0.08  pc)
Details [3]
Mass 1.022±0.027  M☉
Radius 0.968±0.036  R☉
Surface gravity (log g)4.47±0.04  cgs
Temperature 5770±50  K
Metallicity [Fe/H]0.07±0.06  dex
Rotation 8.42±0.09  d [5]
Rotational velocity (v sin i)6.7±0.6 km/s
Age 700±150  Myr
Other designations
BD+65 902, SAO  15908, PPM  18379, TOI-1136, TIC  142276270, TYC  4165-581-1, GSC  04165-00581, 2MASS J12484436+6451191 [4]
Database references
SIMBAD data
Artist's impression of known planets in the TOI-1136 system and their size comparison with Earth and Neptune TOI-1136 system.jpg
Artist's impression of known planets in the TOI-1136 system and their size comparison with Earth and Neptune

TOI-1136 is a G-type main-sequence star 276 light-years (85 parsecs ) away in the constellation Draco. It is slightly smaller than the Sun and similar in mass and temperature, but is much younger, with an age of about 700 million years. It hosts a system of at least six, and possibly seven, exoplanets. [3]

Contents

Planetary system

TOI-1136 was discovered to have six transiting planets in 2022 using the Transiting Exoplanet Survey Satellite (TESS), all orbiting closer to their star than Mercury is to the Sun. [3] All of them are Neptune-sized or mini-Neptunes, and their masses have been measured using a combination of radial velocity and transit-timing variations, showing them to have low densities. [5] The planets are in an orbital resonance, with period ratios near 3:2, 2:1, 3:2, 7:5, and 3:2. [3]

A possible single transit of a seventh planet was also identified. This candidate planet would also be sub-Neptune-sized, but its orbit is poorly constrained. If this is confirmed, it would make TOI-1136 one of the largest known planetary systems. [5]

The TOI-1136 planetary system [3] [5]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b3.50+0.8
−0.7  M🜨 		0.05106±0.00094.1727±0.00030.027±0.00986.44+0.27
−0.21 ° 		1.90+0.21
−0.15  R🜨
c6.32+1.1
−1.3  M🜨 		0.0669±0.00056.2574±0.00020.11±0.0189.42+0.39
−0.55 ° 		2.879+0.060
−0.062  R🜨
d8.35+1.8
−1.6  M🜨 		0.1062±0.000812.5199±0.00040.042±0.00489.41±0.28 ° 4.627+0.077
−0.072  R🜨
e6.07+1.09
−1.01  M🜨 		0.139±0.00218.801±0.0010.0425±0.00489.31+0.26
−0.18 ° 		2.639+0.072
−0.088  R🜨
f9.7+3.9
−3.7  M🜨 		0.174±0.00226.321±0.0010.001±0.00189.38+0.22
−0.17 ° 		3.88±0.11  R🜨
g5.6+4.1
−3.2  M🜨 		0.229±0.00339.545±0.0020.04±0.0189.65+0.18
−0.13 ° 		2.53+0.11
−0.12  R🜨
h(unconfirmed)<18.8 M🜨 ~0.36~770.04+0.05
−0.03		89.68±0.02 ° 2.68+0.20
−0.18  R🜨

See also

Related Research Articles

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<span class="mw-page-title-main">Kepler-27</span> G-type star in the constellation Cygnus

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<span class="mw-page-title-main">TOI-1338</span> Binary star system in the constellation Pictor

TOI-1338 is a binary star system located in the constellation Pictor, about 1,320 light-years from Earth. It is orbited by two known circumbinary planets, TOI-1338 b, discovered by the Transiting Exoplanet Survey Satellite (TESS) and BEBOP-1c, discovered by the Binaries Escorted By Orbiting Planets project.

Kepler-410 is a binary star system. Its primary star, also known as Kepler-410A, is a F-type subgiant star, orbited by the orange dwarf star Kepler-410B on a wide orbit. The companion star was discovered in 2012.

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<span class="mw-page-title-main">K2-25</span> Red dwarf star located in the Hyades cluster

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References

  1. ↑ "Finding the constellation which contains given sky coordinates". djm.cc. 2 August 2008. Archived from the original on 15 August 2019. Retrieved 11 December 2023.
  2. 1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 4 5 6 7 Dai, Fei; Masuda, Kento; et al. (February 2023). "TOI-1136 is a Young, Coplanar, Aligned Planetary System in a Pristine Resonant Chain". The Astronomical Journal . 165 (2). arXiv: 2210.09283 . Bibcode:2023AJ....165...33D. doi: 10.3847/1538-3881/aca327 .
  4. 1 2 3 4 5 6 "TOI-1136". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 10 December 2023.
  5. 1 2 3 4 Beard, Corey; Robertson, Paul; et al. (February 2024). "The TESS-Keck Survey XVII: Precise Mass Measurements in a Young, High Multiplicity Transiting Planet System using Radial Velocities and Transit Timing Variations". The Astronomical Journal . 167 (2). arXiv: 2312.04635 . Bibcode:2024AJ....167...70B. doi: 10.3847/1538-3881/ad1330 .
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