# HD 110067

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Star with six sub-Neptune sized planets in the constellation Coma Berenices

HD 110067 Observation data Epoch J2000 Equinox J2000 Constellation Coma Berenices[1] Right ascension 12h 39m 21.50369s[2] Declination +20° 01′ 40.0360″[2] Apparent magnitude (V) 8.43[3] Characteristics Evolutionary stage Main sequence[2] Spectral type K0V[3] Astrometry Radial velocity (Rv) −8.56±0.13[2] km/s Proper motion (μ) RA: −81.703 mas/yr[2] Dec.: −104.532 mas/yr[2] Parallax (π) 31.0369±0.0222 mas[2] Distance 105.09 ± 0.08 ly (32.22 ± 0.02 pc) Absolute magnitude (MV) +5.96[4] Details[5] Mass 0.798±0.042 M☉ Radius 0.788±0.008 R☉ Luminosity 0.408[6] L☉ Surface gravity (log g) 4.54±0.03 cgs Temperature 5266±64 K Metallicity [Fe/H] −0.20±0.04 dex Rotational velocity (v sin i) 2.5±1.0 km/s Age 8.1±4.0 Gyr Other designations BD+20 2748, HD 110067, SAO 82424, TOI-1835, TIC 347332255, TYC 1448-433-1[7] Database references SIMBAD data Exoplanet Archive data

**HD 110067** is a star with six known [sub-Neptune](/source/Sub-Neptune) [exoplanets](/source/Exoplanet) (b, c, d, e, f, g) with radii ranging from 1.94 [R🜨](/source/Earth_radius) to 2.85 R🜨. The planets orbit the host star in a rhythmic [orbital resonance](/source/Orbital_resonance). The star, and related planetary system, is located 105 [light-years](/source/Light-year) away in the constellation [Coma Berenices](/source/Coma_Berenices).[5][8][9][10][11][12][13][14]

HD 110067 is part of a wide [triple star system](/source/Triple_star_system), along with the [spectroscopic binary](/source/Spectroscopic_binary) system HD 110106.[15]

## Description

HD 110067, located 105 [light-years](/source/Light-years) away in the constellation Coma Berenices, is orbited by six known sub-Neptune exoplanets (b, c, d, e, f, g) with radii ranging from 1.94 [R🜨](/source/Earth_radius) to 2.85 R🜨, and with densities (and solid cores) similar to that of [gas giants](/source/Gas_giant) in the Solar System. None of the planets in the planetary system were found to be in the [habitable zone](/source/Planetary_habitability) for [life](/source/Life) as we know it.[12]

## Discovery

The two innermost exoplanets orbiting HD 110067, a bright [K0-type star](/source/K-type_main-sequence_star), were first detected by the [TESS](/source/Transiting_Exoplanet_Survey_Satellite) ([NASA](/source/NASA)) [space telescope](/source/Space_telescope), using the [transit method](/source/Methods_of_detecting_exoplanets#Transit_photometry), in 2020. The remaining four exoplanets were later confirmed in 2023 as a result of additional observations using the [CHEOPS](/source/CHEOPS) ([European Space Agency](/source/European_Space_Agency)) space telescope.[13]

## Scientific importance

On 29 November 2023, an international team of astronomers, led by Rafael Luque, astronomer from the [University of Chicago](/source/University_of_Chicago), published a review of the discovery in the journal *[Nature](/source/Nature_(journal))* entitled, "A resonant sextuplet of sub-Neptunes transiting the bright star HD 110067".[5] According to Luque, "It’s like looking at a fossil: The orbits of the planets today are the same as they were a billion years ago."[13]

Further study of the HD 110067 planetary system may provide a better understanding of how the pattern of the planetary orbits in the [Solar System](/source/Solar_System) arose, which once may have begun harmoniously, but later turned chaotic. The result, possibly, of a passing star or planet or some other [astronomical object](/source/Astronomical_object) capable of disrupting the nascent harmonic orbital dynamics. Additionally, further studies of the system, including compositional studies of the planetary interiors and atmospheres, may also provide a better understanding of the conditions that potentially may support [life](/source/Life).[13]

The six planets in the HD 110067 system are all smaller than Neptune, and revolve around their parent star in a very precise waltz: When the closest planet to the star makes three full revolutions around it, the second one makes exactly two during the same time; this is called a 3:2 resonance; the six planets form a resonant chain in pairs of 3:2, 3:2, 3:2, 4:3, and 4:3, resulting in the closest planet completing six orbits while the outer-most planet does one.[16]

## Planetary system

Six known [sub-Neptune](/source/Sub-Neptune) [exoplanets](/source/Exoplanet) (b, c, d, e, f, g) with planetary radii ranging from 1.94 [R🜨](/source/Earth_radius) to 2.85 R🜨 from HD 110067, the host star. All planets are smaller than Neptune and have substantial atmospheres. The star and related planetary system are located 105 light years away, in the constellation [Coma Berenices](/source/Coma_Berenices). Masses of all six of the planets in the system range from 3.9 M🜨 to 8.5 [M🜨](/source/Earth_mass). All of the planetary orbits in the HD 110067 system are closer to their star than distance between the planet [Mercury](/source/Mercury_(planet)) and the [Sun](/source/Sun).[5][8]

The planets orbit the host star in synchronized rhythms of [orbital resonance](/source/Orbital_resonance) (a rare 1 percent of such systems in the [Milky Way galaxy](/source/Milky_Way) have this symmetry): the innermost planet orbits three times for every two times for the next planet out – a so-called 3:2 resonance; this same 3:2 resonance also applies to the second and third planet, as well as to the third and fourth planet; whereas the fourth planet orbits four times for every three times for the fifth planet out – in a so-called 4:3 resonance; additionally, the penultimate fifth planet orbits the sixth planet out in this same 4:3 resonance. Further, the innermost planet completes six orbits in exactly the same time the outermost planet completes one orbit.[5][8][9][10][11][12][13][14] The resonance ratio for the entire system is 54:36:24:16:12:9.[5][8]

The HD 110067 planetary system[5] Companion (in order from star) Mass Semimajor axis (AU) Orbital period (days) Eccentricity Inclination (°) Radius b 5.69+1.78 −1.82 M🜨 0.0793±0.00096 9.113678(10) — 89.061±0.099 2.200±0.030 R🜨 c < 6.3 M🜨 0.1039±0.0013 13.673694(24) — 89.687±0.163 2.388±0.036 R🜨 d 8.52+3.31 −3.25 M🜨 0.1362±0.0017 20.519617(40) — 89.248±0.046 2.852±0.039 R🜨 e < 3.9 M🜨 0.1785±0.0022 30.793091(12) — 89.867±0.089 1.940±0.040 R🜨 f 5.04+1.89 −1.94 M🜨 0.2163±0.0026 41.05854(10) — 89.673±0.046 2.601±0.042 R🜨 g < 8.4 M🜨 0.2621±0.0032 54.76992(20) — 89.729±0.073 2.607±0.052 R🜨

## See also

- [HD 10180](/source/HD_10180) – star with six known planets

- [Kepler-11](/source/Kepler-11) – star with six Neptune-like planets

- [LHS 1140](/source/LHS_1140) – star with a system of planets having an atmosphere

- [List of potentially habitable exoplanets](/source/List_of_potentially_habitable_exoplanets)

- [LP 890-9](/source/LP_890-9) – second known coolest star with planets

- [Tabby's Star](/source/Tabby's_Star) – star with notable transit data

- [TRAPPIST-1](/source/TRAPPIST-1) – star with a resonant chain of Earth-sized planets

## References

1. **[^](#cite_ref-1)** [Roman, Nancy G.](/source/Nancy_Roman) (1987). ["Identification of a constellation from a position"](https://doi.org/10.1086%2F132034). *[Publications of the Astronomical Society of the Pacific](/source/Publications_of_the_Astronomical_Society_of_the_Pacific)*. **99** (617): 695. [Bibcode](/source/Bibcode_(identifier)):[1987PASP...99..695R](https://ui.adsabs.harvard.edu/abs/1987PASP...99..695R). [doi](/source/Doi_(identifier)):[10.1086/132034](https://doi.org/10.1086%2F132034). [Constellation record for this object](https://vizier.cds.unistra.fr/viz-bin/VizieR-4?source=VI%2F42%2Fout&%2F%2Ftables=VI%2F42%2Fout&-c=HD+110067&-c.eq=J2000&-c.r=++2&-c.u=arcmin&-c.geom=r&-source=&-source=VI%2F42%2Fout&-out=RA1875&-out=DE1875&-out=Cst) at [VizieR](/source/VizieR).

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) 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%3D3948424496764080640%26-go+%25%23Sesame%23%25%26) at [VizieR](/source/VizieR).

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1. **[^](#cite_ref-reiners2020_6-0)** Reiners, Ansgar; Zechmeister, Mathias (2020). ["Radial Velocity Photon Limits for the Dwarf Stars of Spectral Classes F-M"](https://doi.org/10.3847%2F1538-4365%2Fab609f). *The Astrophysical Journal Supplement Series*. **247** (1): 11. [arXiv](/source/ArXiv_(identifier)):[1912.04120](https://arxiv.org/abs/1912.04120). [Bibcode](/source/Bibcode_(identifier)):[2020ApJS..247...11R](https://ui.adsabs.harvard.edu/abs/2020ApJS..247...11R). [doi](/source/Doi_(identifier)):[10.3847/1538-4365/ab609f](https://doi.org/10.3847%2F1538-4365%2Fab609f).

1. **[^](#cite_ref-SIMBAD_7-0)** ["HD 110067"](http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+110067). *[SIMBAD](/source/SIMBAD)*. [Centre de données astronomiques de Strasbourg](/source/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg). Retrieved 1 December 2023.

1. ^ [***a***](#cite_ref-SCI-20231129_8-0) [***b***](#cite_ref-SCI-20231129_8-1) [***c***](#cite_ref-SCI-20231129_8-2) [***d***](#cite_ref-SCI-20231129_8-3) Clery, Daniel (19 November 2023). ["Astronomers stunned by six-planet system frozen in time - Undisturbed family of "sub-Neptunes" in rhythmic orbits could hold clues to planet formation"](https://www.science.org/content/article/astronomers-stunned-six-planet-system-frozen-time). *[Science](/source/Science_(journal))*. [doi](/source/Doi_(identifier)):[10.1126/science.ze93fui](https://doi.org/10.1126%2Fscience.ze93fui). Retrieved 19 November 2023.{{[cite news](https://en.wikipedia.org/wiki/Template:Cite_news)}}: CS1 maint: deprecated archival service ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_deprecated_archival_service))

1. ^ [***a***](#cite_ref-NASA-20231129_9-0) [***b***](#cite_ref-NASA-20231129_9-1) Brennan, Pat (29 November 2023). ["Watch the synchronized dance of a 6 planet system"](https://exoplanets.nasa.gov/news/1771/discovery-alert-watch-the-synchronized-dance-of-a-6-planet-system/). Discovery Alert. *[NASA](/source/NASA).gov*. Retrieved 29 November 2023.{{[cite news](https://en.wikipedia.org/wiki/Template:Cite_news)}}: CS1 maint: deprecated archival service ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_deprecated_archival_service))

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1. ^ [***a***](#cite_ref-NYT-20231129_13-0) [***b***](#cite_ref-NYT-20231129_13-1) [***c***](#cite_ref-NYT-20231129_13-2) [***d***](#cite_ref-NYT-20231129_13-3) [***e***](#cite_ref-NYT-20231129_13-4) Miller, Katrina (29 November 2023). ["A star with six planets that orbit perfectly in sync. One hundred light years away, a handful of planets are circling a star in the same configuration as when they formed"](https://www.nytimes.com/2023/11/29/science/star-six-planets-orbit-sync.html). *[The New York Times](/source/The_New_York_Times)*. Retrieved 30 November 2023.{{[cite news](https://en.wikipedia.org/wiki/Template:Cite_news)}}: CS1 maint: deprecated archival service ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_deprecated_archival_service))

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1. **[^](#cite_ref-SA-20231130EdL_16-0)** de Lazaro, Enrico (30 November 2023). ["Astronomers discover resonant system of six sub-neptune exoplanets around HD 110067. The bright, nearby star HD 110067 hosts six transiting sub-Neptunes that follow a chain of resonant orbits, according to new research led by University of Chicago astronomers"](https://www.sci.news/astronomy/resonant-system-six-sub-neptune-exoplanets-hd-110067-12496.html). *[Science News](/source/Science_News) (sci.news)*. Retrieved 2 December 2023.{{[cite news](https://en.wikipedia.org/wiki/Template:Cite_news)}}: CS1 maint: deprecated archival service ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_deprecated_archival_service))

## Further reading

- Bean, Jacob L.; Raymond, Sean N.; Owen, James E. (22 October 2020). "The Nature and Origins of Sub-Neptune Size Planets". *Journal of Geophysical Research: Planets*. **126**. [arXiv](/source/ArXiv_(identifier)):[2010.11867](https://arxiv.org/abs/2010.11867). [doi](/source/Doi_(identifier)):[10.1029/2020JE006639](https://doi.org/10.1029%2F2020JE006639).

## External links

- [HD 110067 – Planetary System (video; 2:33)](https://www.youtube.com/watch?v=U8jQEnpQfBM) on [YouTube](/source/YouTube_video_(identifier))

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v t e Constellation of Coma Berenices List of stars in Coma Berenices Coma Berenices in Chinese astronomy Stars Bayer α (Diadem) β γ Flamsteed 7 11 12 13 14 16 17 21 23 (Phyllon Kissinou) 24 31 35 36 37 41 Variable FK GP IN LW HR 4668 HD 107146 108863 108874 110067 114762 b 115404 116029 Other 2MASS J12195156+3128497 KELT-6 WASP-56 WISE 1217+1626 Exoplanets HD 108874 b c KELT-6b Star clusters Coma Star Cluster Messier 53 NGC 4147 NGC 5053 Nebulae LoTr 5 Galaxies Messier 64 (Black Eye Galaxy) 85 88 91 98 99 100 NGC 4014 4015 4017 4053 4056 4060 4061 4065 4066 4070 4072 4074 4076 4084 4086 4089 4090 4091 4092 4093 4095 4098 4136 4146 4150 4162 4185 4189 4203 4211 4212 4213 4222 4237 4245 4253 4262 4274 4278 4293 4298 4302 4308 4310 4312 4314 4323 4328 4340 4359 4375 4383 4393 4394 4414 4419 4448 4450 4455 4459 4468 4473 4474 4475 4477 4479 4489 4494 4495 4498 4502 4506 4515 4516 4523 4525 4540 4555 4556 4558 4559 4561 4565 4571 4585 4595 4611 4614 4615 4633 4634 4651 4659 4670 4673 4676 (Mice Galaxies) 4689 4692 4710 4712 4725 4747 4839 4848 4860 4869 4871 4872 4873 4874 4875 4876 4881 4883 4886 4889 4892 4895 4907 4911 4919 4921 4944 5000 5004 5012 5032 5056 5172 Other 3C 275.1 3C 287 Arp 60 Coma Berenices Dragonfly 44 IC 755 (NGC 4019) IC 831 IC 860 IC 3505 IC 3528 IC 4040 IC 4051 IOK-1 IRAS F12032+1707 LEDA 83677 M85-HCC1 Malin 1 PGC 44691 PKS 1155+251 PKS 1222+216 VIRGOHI21 ZwCl 1305.4+2941 BCG Galaxy clusters Abell 1413 Coma I Coma Cluster Coma Supercluster M94 Group NGC 4065 Group NGC 4631 Group Astronomical events GRB 050509B iPTF14atg SN 1940B SN 1979C SN 2005ap SN 2006X SN 2020oi Category

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