# TOI-1136

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Star in the constellation Draco

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[2] 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 Exoplanet Archive data

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](/source/G-type_main-sequence_star) 276 [light-years](/source/Light-year) (85 [parsecs](/source/Parsec)) away in the constellation [Draco](/source/Draco_(constellation)). It is slightly smaller than the [Sun](/source/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](/source/Exoplanet).[3]

## Planetary system

TOI-1136 was discovered to have six [transiting](/source/Methods_of_detecting_exoplanets#Transit_photometry) planets in 2022 using the [Transiting Exoplanet Survey Satellite](/source/Transiting_Exoplanet_Survey_Satellite) (TESS), all orbiting closer to their star than [Mercury](/source/Mercury_(planet)) is to the Sun.[3] All of them are Neptune-sized or [mini-Neptunes](/source/Mini-Neptune), and their masses have been measured using a combination of [radial velocity](/source/Methods_of_detecting_exoplanets#Radial_velocity) and [transit-timing variations](/source/Transit-timing_variation), showing them to have low densities.[5] The planets are in an [orbital resonance](/source/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 most populous 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 b 3.50+0.8 −0.7 M🜨 0.05106±0.0009 4.1727±0.0003 0.027±0.009 86.44+0.27 −0.21 1.90+0.21 −0.15 R🜨 c 6.32+1.1 −1.3 M🜨 0.0669±0.0005 6.2574±0.0002 0.11±0.01 89.42+0.39 −0.55 2.879+0.060 −0.062 R🜨 d 8.35+1.8 −1.6 M🜨 0.1062±0.0008 12.5199±0.0004 0.042±0.004 89.41±0.28 4.627+0.077 −0.072 R🜨 e 6.07+1.09 −1.01 M🜨 0.139±0.002 18.801±0.001 0.0425±0.004 89.31+0.26 −0.18 2.639+0.072 −0.088 R🜨 f 9.7+3.9 −3.7 M🜨 0.174±0.002 26.321±0.001 0.001±0.001 89.38+0.22 −0.17 3.88±0.11 R🜨 g 5.6+4.1 −3.2 M🜨 0.229±0.003 39.545±0.002 0.04±0.01 89.65+0.18 −0.13 2.53+0.11 −0.12 R🜨 h (unconfirmed) <18.8 M🜨 ~0.36 ~77 0.04+0.05 −0.03 89.68±0.02° 2.68+0.20 −0.18 R🜨

## See also

- [HD 110067](/source/HD_110067)

- [Kepler-90](/source/Kepler-90)

- [Kepler-385](/source/Kepler-385)

- [TOI-178](/source/TOI-178)

- [TRAPPIST-1](/source/TRAPPIST-1)

## References

1. **[^](#cite_ref-1)** ["Finding the constellation which contains given sky coordinates"](http://djm.cc/constellation.html). *djm.cc*. 2 August 2008. [Archived](https://web.archive.org/web/20190815143107/http://djm.cc/constellation.html) from the original on 15 August 2019. Retrieved 11 December 2023.

1. ^ [***a***](#cite_ref-GaiaDR3_2-0) [***b***](#cite_ref-GaiaDR3_2-1) [***c***](#cite_ref-GaiaDR3_2-2) [***d***](#cite_ref-GaiaDR3_2-3) [***e***](#cite_ref-GaiaDR3_2-4) [***f***](#cite_ref-GaiaDR3_2-5) [***g***](#cite_ref-GaiaDR3_2-6) Vallenari, A.; et al. (Gaia collaboration) (2023). ["*Gaia* Data Release 3. Summary of the content and survey properties"](https://doi.org/10.1051%2F0004-6361%2F202243940). *Astronomy and Astrophysics*. **674**: A1. [arXiv](/source/ArXiv_(identifier)):[2208.00211](https://arxiv.org/abs/2208.00211). [Bibcode](/source/Bibcode_(identifier)):[2023A&A...674A...1G](https://ui.adsabs.harvard.edu/abs/2023A&A...674A...1G). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202243940](https://doi.org/10.1051%2F0004-6361%2F202243940). [S2CID](/source/S2CID_(identifier)) [244398875](https://api.semanticscholar.org/CorpusID:244398875). [Gaia DR3 record for this source](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?-source=+I%2F355&-from=nav&-nav=cat%3AI%2F355%26tab%3A%7BI%2F355%2Fgaiadr3%7D%26key%3Asource%3D1355%2Fgaiadr3%26HTTPPRM%3A%26-out.add%3D.%26Source%3D%3D%3D1677343097418015488%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

1. ^ [***a***](#cite_ref-Dai2023_3-0) [***b***](#cite_ref-Dai2023_3-1) [***c***](#cite_ref-Dai2023_3-2) [***d***](#cite_ref-Dai2023_3-3) [***e***](#cite_ref-Dai2023_3-4) [***f***](#cite_ref-Dai2023_3-5) [***g***](#cite_ref-Dai2023_3-6) Dai, Fei; Masuda, Kento; et al. (February 2023). ["TOI-1136 is a Young, Coplanar, Aligned Planetary System in a Pristine Resonant Chain"](https://doi.org/10.3847%2F1538-3881%2Faca327). *[The Astronomical Journal](/source/The_Astronomical_Journal)*. **165** (2). [arXiv](/source/ArXiv_(identifier)):[2210.09283](https://arxiv.org/abs/2210.09283). [Bibcode](/source/Bibcode_(identifier)):[2023AJ....165...33D](https://ui.adsabs.harvard.edu/abs/2023AJ....165...33D). [doi](/source/Doi_(identifier)):[10.3847/1538-3881/aca327](https://doi.org/10.3847%2F1538-3881%2Faca327).

1. ^ [***a***](#cite_ref-SIMBAD_4-0) [***b***](#cite_ref-SIMBAD_4-1) [***c***](#cite_ref-SIMBAD_4-2) [***d***](#cite_ref-SIMBAD_4-3) [***e***](#cite_ref-SIMBAD_4-4) [***f***](#cite_ref-SIMBAD_4-5) ["TOI-1136"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=TOI-1136). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 10 December 2023.

1. ^ [***a***](#cite_ref-Beard2024_5-0) [***b***](#cite_ref-Beard2024_5-1) [***c***](#cite_ref-Beard2024_5-2) [***d***](#cite_ref-Beard2024_5-3) 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"](https://doi.org/10.3847%2F1538-3881%2Fad1330). *[The Astronomical Journal](/source/The_Astronomical_Journal)*. **167** (2). [arXiv](/source/ArXiv_(identifier)):[2312.04635](https://arxiv.org/abs/2312.04635). [Bibcode](/source/Bibcode_(identifier)):[2024AJ....167...70B](https://ui.adsabs.harvard.edu/abs/2024AJ....167...70B). [doi](/source/Doi_(identifier)):[10.3847/1538-3881/ad1330](https://doi.org/10.3847%2F1538-3881%2Fad1330).

v t e Constellation of Draco List of stars in Draco Draco in Chinese astronomy Stars Bayer α (Thuban) β (Rastaban) γ (Eltanin) δ (Altais) ε (Tyl) ζ (Aldhibah) η (Athebyne) θ ι (Edasich) κ λ (Giausar) μ (Alrakis) ν (Kuma) ξ (Grumium) ο π ρ σ (Alsafi) τ υ φ χ ψ1 (Dziban) ψ2 ω Flamsteed 4 6 7 (Tianyi) 8 (Taiyi) 10 (i) 15 (A) 18 (g) 19 (h) 26 36 39 (b) 42 (Fafnir) 45 (d) 50 59 64 (e) 68 Variable TW YY AG BY CL CM CX DO EK HP V581 HR 3751 4126 4934 5811 6237 6518 6618 (Alruba) 6817 7137 7783 HD 109246 (Funi) 101364 128717 147379 156279 158259 176693 191939 Other 2MASS 1237+6526 2MASS J17554042+6551277 G 240-72 GD 356 Gliese 420 Gliese 625 Gliese 687 GRW +70 8247 Kepler-4 Kepler-10 Kepler-12 Kepler-90 Kepler-296 KOI-256 LP 71-82 Qatar-1 SDSS J1240+6710 Struve 2398 TOI-1136 WD 1856+534 WISE 1647+5632 WISE 1841+7000 Exoplanets HD 139357 b HD 167042 b ι Dra b (Hypatia) Kepler-4b Kepler-10b c Kepler-12b Kepler-90e f g h i Kepler-296b c d e f TOI-1452 b TrES-2b Star clusters LAMOST 1 Nebulae Cat's Eye Nebula NGC 6742 Galaxies NGC 3147 3197 3735 4121 4125 4221 4236 4319 4331 4332 4363 4441 4513 4545 4589 5678 5777 5866 5866B 5879 5905 5907 5949 5963 5965 5982 5985 6090 6248 6285 6286 6338 6340 6365 6373 6394 6412 6503 6505 6566 6621 6622 6670 6676 6786 6789 Other 1ES 1927+654 1ES 1959+650 3C 249.1 3C 305 3C 319 3C 343 3C 343.1 3C 351 3C 356 3C 371 3C 380 3C 390.3 3C 401 4C +72.26 4C 73.08 8C 1241+735 Abell 2218 BCG Bean galaxy Beaver galaxy BZQ J1727+5510 Draco Dwarf Draco II GB 1508+5714 Goldfish galaxy H1821+643 HFLS3 IERS B1946+708 IRAS F17179+5444 IRAS 18580+6527 J120011.1+680924.8 KKR 25 Markarian 817 Markarian 876 Original TRG PGC 39058 Porphyrion QSO B1823+568 RGZ J172749.5+534647 S5 1803+784 S5 2007+777 SDSS J1715+6008 Tadpole Galaxy UGC 9391 UGC 9405 UGC 11241 UGC 11411 WISEA J145223.62+611707.5 WN B1851+5707 Galaxy clusters Abell 2218 CL1358+62 Draco Supercluster NGC 5866 Group Astronomical events SN 2003jb SN 2005B SN 2016aps Swift J1644+57 Category

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Adapted from the Wikipedia article [TOI-1136](https://en.wikipedia.org/wiki/TOI-1136) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/TOI-1136?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.