# Iota Draconis

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Star in the constellation Draco

Iota Draconis / Edasich Location of ι Draconis (circled) Observation data Epoch J2000 Equinox J2000 Constellation Draco Right ascension 15h 24m 55.77463s[1] Declination +58° 57′ 57.8344″[1] Apparent magnitude (V) 3.290[2] Characteristics Evolutionary stage Red giant branch[3] Spectral type K2III[4] U−B color index +1.230[2] B−V color index +1.160[2] Variable type Suspected[5] Astrometry Radial velocity (Rv) −10.71[6] km/s Proper motion (μ) RA: −8.36[1] mas/yr Dec.: +17.08[1] mas/yr Parallax (π) 32.23±0.10 mas[1] Distance 101.2 ± 0.3 ly (31.03 ± 0.10 pc) Absolute magnitude (MV) 0.99±0.007[7] Details Mass 1.56±0.08[3] M☉ Radius 11.99±0.06[3] R☉ Luminosity 52.8±2.1[3] L☉ Surface gravity (log g) 2.52+0.007 −0.07[3] cgs Temperature 4,504±62[8] K Metallicity [Fe/H] +0.03±0.08[3] dex Rotation 434 days[5] Rotational velocity (v sin i) 1.5[5] km/s Age 2.49+0.64 −0.62[3] Gyr Other designations Edasich, 12 Draconis, BD+59 1654, FK5 571, HD 137759, HIP 75458, HR 5744, SAO 29520, 2MASS J15245578+5857577[9] Database references SIMBAD data Exoplanet Archive data

**Iota Draconis** (**ι Draconis**, abbreviated **Iota Dra**, **ι Dra**), also named **Edasich** [/ˈɛdəsɪk/](https://en.wikipedia.org/wiki/Help:IPA/English),[10][11] is a [star](/source/Star) in the northern [circumpolar constellation](/source/Circumpolar_constellation) of [Draco](/source/Draco_(constellation)). A visually unremarkable star of [apparent magnitude](/source/Apparent_magnitude) 3.3,[2] in 2002 it was discovered to have a planet orbiting it[12] (designated [Iota Draconis b](/source/Iota_Draconis_b), later named Hypatia). From [parallax](/source/Parallax) measurements, this star is located at a distance of about 101.2 [light-years](/source/Light-year) (31.0 [parsecs](/source/Parsec)) from the [Sun](/source/Sun).[1]

## Nomenclature

*ι Draconis* ([Latinised](/source/Latinisation_of_names) to *Iota Draconis*) is the star's [Bayer designation](/source/Bayer_designation). On discovery the planet was designated Iota Draconis b (or Edasich b).

It bore the traditional name *Edasich*, derived from the [Arabic](/source/Arabic) *Al Ḍhiba*' of [Ulugh Beg](/source/Ulugh_Beg) and the Dresden Globe, or *Al dhīlī* 'Male hyena' by Kazwini, with *Eldsich* being recorded in the *Century Cyclopedia*.[13] In 2016, the [International Astronomical Union](/source/International_Astronomical_Union) organized a [Working Group on Star Names](/source/IAU_Working_Group_on_Star_Names) (WGSN)[14] to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016[15] included a table of the first two batches of names approved by the WGSN; which included *Edasich* for this star.

In July 2014 the [International Astronomical Union](/source/International_Astronomical_Union) launched [NameExoWorlds](/source/NameExoWorlds), a process for giving proper names to certain exoplanets and their host stars.[16] The process involved public nomination and voting for the new names.[17] In December 2015, the IAU announced the winning name was Hypatia for this planet.[18] The winning name was submitted by Hypatia, a student society of the Physics Faculty of the [Universidad Complutense de Madrid](/source/Complutense_University_of_Madrid), [Spain](/source/Spain). [Hypatia](/source/Hypatia) was a famous Greek astronomer, mathematician, and philosopher.[19]

In [Chinese](/source/Chinese_astronomy), 紫微左垣 (*Zǐ Wēi Zuǒ Yuán*), meaning *[Left Wall of Purple Forbidden Enclosure](/source/Purple_Forbidden_enclosure)*, refers to an [asterism](/source/Asterism_(astronomy)) consisting of Iota Draconis, [Theta Draconis](/source/Theta_Draconis), [Eta Draconis](/source/Eta_Draconis), [Zeta Draconis](/source/Zeta_Draconis), [Upsilon Draconis](/source/Upsilon_Draconis), [73 Draconis](https://en.wikipedia.org/w/index.php?title=73_Draconis&action=edit&redlink=1), [Gamma Draconis](/source/Gamma_Draconis) and [23 Cassiopeiae](/source/23_Cassiopeiae).[20] Consequently, the [Chinese name](/source/Chinese_star_names) for Iota Draconis itself is 紫微左垣一 (*Zǐ Wēi Zuǒ Yuán yī*, English: the First Star of Left Wall of Purple Forbidden Enclosure),[21] representing 左樞 (*Zuǒshū*), meaning *Left Pivot*.[22] 左樞 (Zuǒshū) is westernized into *Tsao Choo* by R.H. Allen with the same meaning [23]

## Properties

Iota Draconis is larger and more massive than the Sun, with 1.6 times the mass and nearly 12 times the radius.[3] The [spectrum](/source/Stellar_spectrum) matches a [stellar classification](/source/Stellar_classification) of K2 III,[4] indicating this is an [evolved](/source/Stellar_evolution) star that has exhausted the supply of hydrogen at its core and left the [main sequence](/source/Main_sequence). It is currently on the [red giant branch](/source/Red_giant_branch), fusing hydrogen in a shell around its helium core. With an expanded outer envelope, it is radiating over 50 times the luminosity of the Sun at an [effective temperature](/source/Effective_temperature) of 4,504 K.[8] This temperature gives it an orange hue that is a characteristic of K-type stars.[24] It is rotating at a leisurely rate, with a period of around 434 days.[5] It is about 2.5 billion years old.[3]

In the past Iota Draconis has been suspected of [variability](/source/Variable_star). However, the star has been found to have a constant luminosity to within about 0.004 magnitudes. Hence, as of 2010, the variability remains unconfirmed.[5] An [excess emission of infrared radiation](/source/Infrared_excess) at a [wavelength](/source/Wavelength) of 70[μm](/source/Micrometre) suggests the presence of a circumstellar disk of dust; what astronomers term a [debris disk](/source/Debris_disk).[25]

Edasich is the faintest star of which a color has been reported in pre-telescopic times. It was classified as an orange-red star.[26]

## Planetary system

The Iota Draconis planetary system[27] Companion (in order from star) Mass Semimajor axis (AU) Orbital period (years) Eccentricity Inclination (°) Radius b (Hypatia) 16.4+9.3 −4.0 MJ 1.453±0.026 1.39864±0.00004 0.7010+0.0016 −0.0017 46+27 −19 — c 17.0+13 −5.4 MJ 19.4+10 −7.7 68+60 −36 0.455+0.12 −0.084 86±19 — Dust disk ? AU — —

The planetary companion discovered in 2002 was the first planet known to orbit a giant star.[12] It was noted that the alignment of this planet's eccentric orbit means it has about 11% probability of [transiting](/source/Transit_method) its star.[5][28] Another long-period planet or brown dwarf was discovered in 2021, and the true masses of both planets were measured via [astrometry](/source/Astrometry).[27]

## References

1. ^ [***a***](#cite_ref-aaa474_2_653_1-0) [***b***](#cite_ref-aaa474_2_653_1-1) [***c***](#cite_ref-aaa474_2_653_1-2) [***d***](#cite_ref-aaa474_2_653_1-3) [***e***](#cite_ref-aaa474_2_653_1-4) [***f***](#cite_ref-aaa474_2_653_1-5) van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", *Astronomy and Astrophysics*, **474** (2): 653–664, [arXiv](/source/ArXiv_(identifier)):[0708.1752](https://arxiv.org/abs/0708.1752), [Bibcode](/source/Bibcode_(identifier)):[2007A&A...474..653V](https://ui.adsabs.harvard.edu/abs/2007A&A...474..653V), [doi](/source/Doi_(identifier)):[10.1051/0004-6361:20078357](https://doi.org/10.1051%2F0004-6361%3A20078357), [S2CID](/source/S2CID_(identifier)) [18759600](https://api.semanticscholar.org/CorpusID:18759600)

1. ^ [***a***](#cite_ref-mnras172_667_2-0) [***b***](#cite_ref-mnras172_667_2-1) [***c***](#cite_ref-mnras172_667_2-2) [***d***](#cite_ref-mnras172_667_2-3) Jennens, P. A.; Helfer, H. L. (September 1975), "A new photometric metal abundance and luminosity calibration for field G and K giants", *[Monthly Notices of the Royal Astronomical Society](/source/Monthly_Notices_of_the_Royal_Astronomical_Society)*, **172** (3): 667–679, [Bibcode](/source/Bibcode_(identifier)):[1975MNRAS.172..667J](https://ui.adsabs.harvard.edu/abs/1975MNRAS.172..667J), [doi](/source/Doi_(identifier)):[10.1093/mnras/172.3.667](https://doi.org/10.1093%2Fmnras%2F172.3.667)

1. ^ [***a***](#cite_ref-campante2023_3-0) [***b***](#cite_ref-campante2023_3-1) [***c***](#cite_ref-campante2023_3-2) [***d***](#cite_ref-campante2023_3-3) [***e***](#cite_ref-campante2023_3-4) [***f***](#cite_ref-campante2023_3-5) [***g***](#cite_ref-campante2023_3-6) [***h***](#cite_ref-campante2023_3-7) [***i***](#cite_ref-campante2023_3-8) Campante, Tiago L.; Li, Tanda; Ong, J. M. Joel; Corsaro, Enrico; Cunha, Margarida S.; Bedding, Timothy R.; Bossini, Diego; Breton, Sylvain N.; Buzasi, Derek L.; Chaplin, William J.; Deal, Morgan; García, Rafael A.; Hill, Michelle L.; Hon, Marc; Huber, Daniel; Jiang, Chen; Kane, Stephen R.; Kayhan, Cenk; Kuszlewicz, James S.; Lillo-Box, Jorge; Mathur, Savita; Monteiro, Mário J. P. F. G.; Pereira, Filipe; Santos, Nuno C.; Serenelli, Aldo; Stello, Dennis (2023), "Revisiting the Red Giant Branch Hosts KOI-3886 and ι Draconis. Detailed Asteroseismic Modeling and Consolidated Stellar Parameters", *The Astronomical Journal*, **165** (5): 214, [arXiv](/source/ArXiv_(identifier)):[2304.01570](https://arxiv.org/abs/2304.01570), [Bibcode](/source/Bibcode_(identifier)):[2023AJ....165..214C](https://ui.adsabs.harvard.edu/abs/2023AJ....165..214C), [doi](/source/Doi_(identifier)):[10.3847/1538-3881/acc9c1](https://doi.org/10.3847%2F1538-3881%2Facc9c1), [S2CID](/source/S2CID_(identifier)) [257921759](https://api.semanticscholar.org/CorpusID:257921759)

1. ^ [***a***](#cite_ref-araa11_29_4-0) [***b***](#cite_ref-araa11_29_4-1) Morgan, W. W.; Keenan, P. C. (1973), "Spectral Classification", *Annual Review of Astronomy and Astrophysics*, **11**: 29–50, [Bibcode](/source/Bibcode_(identifier)):[1973ARA&A..11...29M](https://ui.adsabs.harvard.edu/abs/1973ARA&A..11...29M), [doi](/source/Doi_(identifier)):[10.1146/annurev.aa.11.090173.000333](https://doi.org/10.1146%2Fannurev.aa.11.090173.000333)

1. ^ [***a***](#cite_ref-apj720_2_1644_5-0) [***b***](#cite_ref-apj720_2_1644_5-1) [***c***](#cite_ref-apj720_2_1644_5-2) [***d***](#cite_ref-apj720_2_1644_5-3) [***e***](#cite_ref-apj720_2_1644_5-4) [***f***](#cite_ref-apj720_2_1644_5-5) Kane, Stephen R.; et al. (September 2010), "On the Transit Potential of the Planet Orbiting Iota Draconis", *The Astrophysical Journal*, **720** (2): 1644–1649, [arXiv](/source/ArXiv_(identifier)):[1007.3501](https://arxiv.org/abs/1007.3501), [Bibcode](/source/Bibcode_(identifier)):[2010ApJ...720.1644K](https://ui.adsabs.harvard.edu/abs/2010ApJ...720.1644K), [doi](/source/Doi_(identifier)):[10.1088/0004-637X/720/2/1644](https://doi.org/10.1088%2F0004-637X%2F720%2F2%2F1644), [S2CID](/source/S2CID_(identifier)) [15944824](https://api.semanticscholar.org/CorpusID:15944824)

1. **[^](#cite_ref-aaa430_165_6-0)** Famaey, B.; et al. (January 2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", *Astronomy and Astrophysics*, **430** (1): 165–186, [arXiv](/source/ArXiv_(identifier)):[astro-ph/0409579](https://arxiv.org/abs/astro-ph/0409579), [Bibcode](/source/Bibcode_(identifier)):[2005A&A...430..165F](https://ui.adsabs.harvard.edu/abs/2005A&A...430..165F), [doi](/source/Doi_(identifier)):[10.1051/0004-6361:20041272](https://doi.org/10.1051%2F0004-6361%3A20041272), [S2CID](/source/S2CID_(identifier)) [17804304](https://api.semanticscholar.org/CorpusID:17804304)

1. **[^](#cite_ref-park2013_7-0)** Park, Sunkyung; et al. (2013), "Wilson-Bappu Effect: Extended to Surface Gravity", *The Astronomical Journal*, **146** (4): 73, [arXiv](/source/ArXiv_(identifier)):[1307.0592](https://arxiv.org/abs/1307.0592), [Bibcode](/source/Bibcode_(identifier)):[2013AJ....146...73P](https://ui.adsabs.harvard.edu/abs/2013AJ....146...73P), [doi](/source/Doi_(identifier)):[10.1088/0004-6256/146/4/73](https://doi.org/10.1088%2F0004-6256%2F146%2F4%2F73), [S2CID](/source/S2CID_(identifier)) [119187733](https://api.semanticscholar.org/CorpusID:119187733)

1. ^ [***a***](#cite_ref-apj743_2_120_8-0) [***b***](#cite_ref-apj743_2_120_8-1) Baines, Ellyn K.; et al. (December 2011), "Fundamental Parameters of the Exoplanet Host K Giant Star ι Draconis from the CHARA Array", *The Astrophysical Journal*, **743** (2): 130, [arXiv](/source/ArXiv_(identifier)):[1109.4950](https://arxiv.org/abs/1109.4950), [Bibcode](/source/Bibcode_(identifier)):[2011ApJ...743..130B](https://ui.adsabs.harvard.edu/abs/2011ApJ...743..130B), [doi](/source/Doi_(identifier)):[10.1088/0004-637X/743/2/130](https://doi.org/10.1088%2F0004-637X%2F743%2F2%2F130), [S2CID](/source/S2CID_(identifier)) [16119580](https://api.semanticscholar.org/CorpusID:16119580)

1. **[^](#cite_ref-SIMBAD_9-0)** ["iot Dra -- Variable Star"](http://simbad.u-strasbg.fr/simbad/sim-id?Ident=Iota+Draconis), *SIMBAD*, Centre de Données astronomiques de Strasbourg, retrieved 2012-01-11

1. **[^](#cite_ref-Kunitzsch_10-0)** Kunitzsch, Paul; Smart, Tim (2006), *A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations* (2nd rev. ed.), Cambridge, Massachusetts: Sky Pub, [ISBN](/source/ISBN_(identifier)) [978-1-931559-44-7](https://en.wikipedia.org/wiki/Special:BookSources/978-1-931559-44-7)

1. **[^](#cite_ref-IAU-CSN_11-0)** [*IAU Catalog of Star Names*](http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt), retrieved 28 July 2016

1. ^ [***a***](#cite_ref-Frink2002_12-0) [***b***](#cite_ref-Frink2002_12-1) Frink, Sabine; et al. (2002), "Discovery of a Substellar Companion to the K2 III Giant Iota Draconis", *The Astrophysical Journal*, **576** (1): 478–484, [Bibcode](/source/Bibcode_(identifier)):[2002ApJ...576..478F](https://ui.adsabs.harvard.edu/abs/2002ApJ...576..478F), [CiteSeerX](/source/CiteSeerX_(identifier)) [10.1.1.6.5332](https://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.6.5332), [doi](/source/Doi_(identifier)):[10.1086/341629](https://doi.org/10.1086%2F341629), [S2CID](/source/S2CID_(identifier)) [12778096](https://api.semanticscholar.org/CorpusID:12778096)

1. **[^](#cite_ref-allen_13-0)** Allen, Richard Hinckley (1899), [*Star-names and Their Meanings*](https://books.google.com/books?id=5xQuAAAAIAAJ&pg=PA210), New York: G. E. Stechert, p. 210

1. **[^](#cite_ref-WGSN_14-0)** [*IAU Working Group on Star Names (WGSN)*](https://web.archive.org/web/20160610172014/https://www.iau.org/science/scientific_bodies/working_groups/280/), archived from [the original](https://www.iau.org/science/scientific_bodies/working_groups/280/) on 10 June 2016, retrieved 22 May 2016

1. **[^](#cite_ref-WGSN1_15-0)** [*Bulletin of the IAU Working Group on Star Names, No. 1*](http://www.pas.rochester.edu/~emamajek/WGSN/WGSN_bulletin1.pdf) (PDF), retrieved 28 July 2016

1. **[^](#cite_ref-16)** [NameExoWorlds: An IAU Worldwide Contest to Name Exoplanets and their Host Stars](http://www.iau.org/news/pressreleases/detail/iau1404/) [Archived](https://web.archive.org/web/20170904221813/https://www.iau.org/news/pressreleases/detail/iau1404/) 2017-09-04 at the [Wayback Machine](/source/Wayback_Machine). IAU.org. 9 July 2014

1. **[^](#cite_ref-nameexoworlds_17-0)** [*NameExoWorlds The Process*](https://web.archive.org/web/20150815025117/http://www.nameexoworlds.iau.org/process), archived from [the original](http://nameexoworlds.iau.org/process) on 2015-08-15, retrieved 2015-09-05

1. **[^](#cite_ref-18)** [Final Results of NameExoWorlds Public Vote Released](http://www.iau.org/news/pressreleases/detail/iau1514/) [Archived](https://web.archive.org/web/20171202072549/http://www.iau.org/news/pressreleases/detail/iau1514/) 2017-12-02 at the [Wayback Machine](/source/Wayback_Machine), International Astronomical Union, 15 December 2015.

1. **[^](#cite_ref-nameexoworldsnames_19-0)** [*NameExoWorlds The Approved Names*](https://web.archive.org/web/20180201043609/http://nameexoworlds.iau.org/names), archived from [the original](http://nameexoworlds.iau.org/names) on 2018-02-01, retrieved 2016-01-02

1. **[^](#cite_ref-20)** (in Chinese) *中國星座神話*, written by 陳久金. Published by 台灣書房出版有限公司, 2005, [ISBN](/source/ISBN_(identifier)) [978-986-7332-25-7](https://en.wikipedia.org/wiki/Special:BookSources/978-986-7332-25-7).

1. **[^](#cite_ref-21)** (in Chinese) [香港太空館 - 研究資源 - 亮星中英對照表](http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_e_g.htm) [Archived](https://web.archive.org/web/20110130063007/http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/c_research_chinengstars_e_g.htm) 2011-01-30 at the [Wayback Machine](/source/Wayback_Machine), Hong Kong Space Museum. Accessed on line November 23, 2010.

1. **[^](#cite_ref-22)** (in Chinese) [English-Chinese Glossary of Chinese Star Regions, Asterisms and Star Name](http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/e_research_chinengstarzone_b.htm#PrupleForbiddenEnclosure) [Archived](https://web.archive.org/web/20080924022136/http://www.lcsd.gov.hk/CE/Museum/Space/Research/StarName/e_research_chinengstarzone_b.htm) 2008-09-24 at the [Wayback Machine](/source/Wayback_Machine), Hong Kong Space Museum. Accessed on line November 23, 2010.

1. **[^](#cite_ref-23)** [Star Name - R.H. Allen p. 210](https://penelope.uchicago.edu/Thayer/E/Gazetteer/Topics/astronomy/_Texts/secondary/ALLSTA/Draco*.html)

1. **[^](#cite_ref-csiro_24-0)** ["The Colour of Stars"](https://web.archive.org/web/20120318151427/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html), *Australia Telescope, Outreach and Education*, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from [the original](http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html) on March 18, 2012, retrieved 2012-01-16

1. **[^](#cite_ref-apjl700_2_L73_25-0)** Kóspál, Ágnes; et al. (August 2009), "On the Relationship Between Debris Disks and Planets", *The Astrophysical Journal Letters*, **700** (2): L73–L77, [arXiv](/source/ArXiv_(identifier)):[0907.0028](https://arxiv.org/abs/0907.0028), [Bibcode](/source/Bibcode_(identifier)):[2009ApJ...700L..73K](https://ui.adsabs.harvard.edu/abs/2009ApJ...700L..73K), [doi](/source/Doi_(identifier)):[10.1088/0004-637X/700/2/L73](https://doi.org/10.1088%2F0004-637X%2F700%2F2%2FL73), [S2CID](/source/S2CID_(identifier)) [16636256](https://api.semanticscholar.org/CorpusID:16636256)

1. **[^](#cite_ref-Neuhäuser_et_al_2022_26-0)** Neuhäuser, R.; et al. (July 2022). ["Colour evolution of Betelgeuse and Antares over two millennia, derived from historical records, as a new constraint on mass and age"](https://doi.org/10.1093%2Fmnras%2Fstac1969). *Monthly Notices of the Royal Astronomical Society*. **516** (1): 693–719. [arXiv](/source/ArXiv_(identifier)):[2207.04702](https://arxiv.org/abs/2207.04702). [Bibcode](/source/Bibcode_(identifier)):[2022MNRAS.516..693N](https://ui.adsabs.harvard.edu/abs/2022MNRAS.516..693N). [doi](/source/Doi_(identifier)):[10.1093/mnras/stac1969](https://doi.org/10.1093%2Fmnras%2Fstac1969).

1. ^ [***a***](#cite_ref-Hill2021_27-0) [***b***](#cite_ref-Hill2021_27-1) Hill, Michelle L.; Kane, Stephen R.; Campante, Tiago L.; Li, Zhexing; Dalba, Paul A.; Brandt, Timothy D.; White, Timothy R.; Pope, Benjamin J. S.; Stassun, Keivan G.; Fulton, Benjamin J.; Corsaro, Enrico; Li, Tanda; Joel Ong, J. M.; Bedding, Timothy R.; Bossini, Diego; Buzasi, Derek L.; Chaplin, William J.; Cunha, Margarida S.; Garcia, Rafael A.; Breton, Sylvain N.; Hon, Marc; Huber, Daniel; Jiang, Chen; Kayhan, Cenk; Kuszlewicz, James S.; Mathur, Savita; Serenelli, Aldo; Stello, Dennis (2021), "Asteroseismology of iota Draconis and Discovery of an Additional Long-period Companion", *The Astronomical Journal*, **162** (5): 211, [arXiv](/source/ArXiv_(identifier)):[2107.13583](https://arxiv.org/abs/2107.13583), [Bibcode](/source/Bibcode_(identifier)):[2021AJ....162..211H](https://ui.adsabs.harvard.edu/abs/2021AJ....162..211H), [doi](/source/Doi_(identifier)):[10.3847/1538-3881/ac1b31](https://doi.org/10.3847%2F1538-3881%2Fac1b31), [S2CID](/source/S2CID_(identifier)) [236493583](https://api.semanticscholar.org/CorpusID:236493583)

1. **[^](#cite_ref-2019PASP..131c4401D_28-0)** Dalba, Paul A.; Kane, Stephen R.; Barclay, Thomas; Bean, Jacob L.; Campante, Tiago L.; Pepper, Joshua; Ragozzine, Darin; Turnbull, Margaret C. (2019-03-01). ["Predicted Yield of Transits of Known Radial Velocity Exoplanets from the TESS Primary and Extended Missions"](https://iopscience.iop.org/article/10.1088/1538-3873/aaf183/pdf). *Publications of the Astronomical Society of the Pacific*. **131** (997): 034401. [arXiv](/source/ArXiv_(identifier)):[1811.06550](https://arxiv.org/abs/1811.06550). [Bibcode](/source/Bibcode_(identifier)):[2019PASP..131c4401D](https://ui.adsabs.harvard.edu/abs/2019PASP..131c4401D). [doi](/source/Doi_(identifier)):[10.1088/1538-3873/aaf183](https://doi.org/10.1088%2F1538-3873%2Faaf183). [ISSN](/source/ISSN_(identifier)) [0004-6280](https://search.worldcat.org/issn/0004-6280). Retrieved 2025-07-24.

## External links

- [*Extrasolar Planets Encyclopaedia*: Notes for star HIP 75458](https://web.archive.org/web/20071106060307/http://exoplanet.eu/star.php?st=HIP+75458)

- [*SolStation*: Edasich/Iota Draconis](https://web.archive.org/web/20020420065521/http://solstation.com/stars2/edasich.htm)

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