# L 98-59 > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/L_98-59 > Markdown URL: https://mediated.wiki/source/L_98-59.md > Source: https://en.wikipedia.org/wiki/L_98-59 > Source revision: 1346111193 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) {{Short description|Red dwarf in the constellation Volans}} {{Starbox begin | name = L 98-59 }} {{Starbox observe | epoch = J2000 | constell = [Volans](/source/Volans) | ra = {{RA|08|18|07.62144}} | dec = {{DEC|-68|18|46.8054}} | appmag_v = {{val|11.69|0.05}} }} {{Starbox character | engvar=en-UK | type = [Red dwarf](/source/Red_dwarf) ([main sequence](/source/main_sequence)) | class = M3V | variable = None |b-v=+1.53 |r-i=+1.28 }} {{Starbox astrometry | radial_v = {{val|-6.10|0.19}} | prop_mo_ra = {{val|94.794|(18)}} | prop_mo_dec = {{val|-340.084|(20)}} | pm_footnote = | parallax = 94.2664 | p_error = 0.0155 | parallax_footnote = | absmag_v = | absmag_bol = }} {{Starbox detail | source = | mass = {{val|0.2923|0.0067}} | radius = {{val|0.3155|0.0062}} | luminosity_bolometric = {{val|0.0122|0.0010}} | gravity = {{val|4.91|0.02}} | temperature = {{val|3415|60|fmt=commas}} | habitable_inner = 0.090 [au](/source/astronomical_unit) | habitable_outer = 0.237 au | metal_fe = {{val|-0.46|0.26}} | rotation = {{val|76.7|1.5}} days | rotational_velocity = | age_gyr = {{val|4.94|1.44}} }} {{Starbox catalog | names = {{odlist | 2MASS=J08180763-6818468 | L=98-59 | NLTT=19357 | TIC=307210830 | TOI=175 | TYC=9193-2365-1}} }} {{Starbox reference | Simbad = L+98-59 | NSTED = L-98-59 }} {{Starbox end}} thumb|The system as illustrated by NASA. Note that the illustration was created before the discoveries of planet e and f. '''L 98-59''' (TOI-175, TIC 307210830) is a bright M [dwarf star](/source/dwarf_star), located in the [constellation](/source/constellation) of [Volans](/source/Volans), at a distance of {{convert|10.608|pc|ly|lk=on|abbr=off}}, as measured by the [''Gaia''](/source/Gaia_(spacecraft)) spacecraft. Broadband photometry shows that it is an M3 [dwarf star](/source/dwarf_star) with three confirmed terrestrial-sized [planet](/source/planet)s in transit, which were announced in March 2019 by [TESS](/source/TESS), as well as two additional non-transiting planets, for a total of five known planets. The outermost planet is in the [habitable zone](/source/habitable_zone). ==Planetary system== The planets b, c, and d of L 98-59 were discovered in 2019 by [TESS](/source/Transiting_Exoplanet_Survey_Satellite). The non-transiting potential super-Venus planet L 98-59 e was discovered in 2021, along with indications of the presence of L 98-59 f, another non-transiting [super-Earth](/source/super-Earth) located in the system's habitable zone. In 2025, the planet f was confirmed, and an additional planet candidate orbiting interior to planet b was detected. The two innermost confirmed planets, [L 98-59 b](/source/L_98-59_b) and c, as well as L 98-59 e are possibly hot rocky worlds. L 98-59 d has a low density, around {{val|2.2|u=g/cm3}} versus {{val|5.5|u=g/cm3}} for Earth, indicating large amounts of volatiles. In September 2021, suggested tests of the abilities of the [Hubble Space Telescope](/source/Hubble_Space_Telescope) and the [James Webb Space Telescope](/source/James_Webb_Space_Telescope) (JWST) to detect and describe the atmospheric features of the three inner planets were reported. Hubble observations of the three transiting planets in 2022 have found no clear evidence of [atmosphere](/source/atmosphere)s, with high mean [molecular weight](/source/molecular_weight) atmospheres, cloudy or hazy atmospheres, or no atmospheres all being consistent with the observed flat spectra. However, the JWST did find evidence of [sulfur dioxide](/source/sulfur_dioxide), [hydrogen](/source/hydrogen) and [hydrogen sulfide](/source/hydrogen_sulfide) for planets b and d, suggesting that both are sulfur-rich volcanic worlds with strong [tidal heating](/source/tidal_heating), and may contain a global internal [magma](/source/magma) ocean. {{OrbitboxPlanet begin | name = L 98-59 | table_ref = }} {{OrbitboxPlanet hypothetical | exoplanet = .06 | mass_earth = {{val|0.58|0.12|p=≥}} | period = {{val|1.7361|0.0007|0.0008}} | semimajor = {{val|0.0188|0.0004}} | eccentricity = {{val|0.027|0.040|0.020}} }} {{OrbitboxPlanet | exoplanet = [b](/source/L_98-59_b) | mass_earth = {{val|0.46|0.11}} | period = {{val|2.2531140|(4)|fmt=none}} | semimajor = {{val|0.0223|0.0007}} | radius_earth = {{val|0.837|0.019}} | eccentricity = {{val|0.031|0.017|0.016}} | inclination = {{val|88.08|0.23|0.20}} }} {{OrbitboxPlanet | exoplanet = c | mass_earth = {{val|2.00|0.13}} | period = {{val|3.6906764|(4)|fmt=none}} | semimajor = {{val|0.0309|0.0010}} | radius_earth = {{val|1.329|0.029}} | eccentricity = {{val|0.002|0.002|0.001}} | inclination = {{val|88.88|0.21|0.17}} }} {{OrbitboxPlanet | exoplanet = d | mass_earth = {{val|1.64|0.07}} | period = {{val|7.450729|(2)|fmt=none}} | semimajor = {{val|0.0494|0.0016}} | radius_earth = {{val|1.627|0.041}} | eccentricity = {{val|0.006|0.007|0.004}} | inclination = {{val|88.44|0.05}} }} {{OrbitboxPlanet | exoplanet = e | mass_earth = {{val|2.82|0.19|p=≥}} | period = {{val|12.8278|0.0018}} | semimajor = {{val|0.0712|0.0022}} | radius_earth = | eccentricity = {{val|0.012|0.009|0.008}} | inclination = 80–88.82 }} {{OrbitboxPlanet | exoplanet = f | mass_earth = {{val|2.8|0.3|p=≥}} | period = {{val|23.064|0.055}} | semimajor = {{val|0.1052|0.0033}} | radius_earth = | eccentricity = {{val|0.044|0.027|0.028}} | inclination = 74–89.20 }} {{Orbitbox end}} ==Gallery== [[File:Comparison of the L 98-59 exoplanet system with the inner Solar System.jpg|thumb|left|655px|
Artist's impression of the L 98-59 system, compared to the [inner Solar System](/source/inner_Solar_System). Distances are not to scale.
]] {{clear}} == See also == * {{annotated link|List of potentially habitable exoplanets}} * {{annotated link|List of exoplanets discovered in 2019}} * {{annotated link|TOI-700 d}} == References == {{Reflist|refs= {{cite simbad |title=L 98-59 |access-date=23 March 2025}} {{Cite Gaia DR3|5271055243163629056}} {{Cite journal|last1=Cloutier|first1=R.|last2=Astudillo-Defru|first2=N.|last3=Bonfils|first3=X.|last4=Jenkins|first4=J. S.|last5=Berdiñas|first5=Z.|last6=Ricker|first6=G.|last7=Vanderspek|first7=R.|last8=Latham|first8=D. W.|last9=Seager|first9=S.|last10=Winn|first10=J.|last11=Jenkins|first11=J. M.|date=2019-09-01|title=Characterization of the L 98-59 multi-planetary system with HARPS - Mass characterization of a hot super-Earth, a sub-Neptune, and a mass upper limit on the third planet|url=https://www.aanda.org/articles/aa/abs/2019/09/aa35957-19/aa35957-19.html|journal=[Astronomy & Astrophysics](/source/Astronomy_%26_Astrophysics) |language=en|volume=629|pages=A111|doi=10.1051/0004-6361/201935957|arxiv=1905.10669|bibcode=2019A&A...629A.111C |issn=0004-6361|hdl=1721.1/125703|s2cid=166228063|hdl-access=free}} {{Cite journal|last1=Kostov|first1=Veselin B.|last2=Schlieder|first2=Joshua E.|last3=Barclay|first3=Thomas|last4=Quintana|first4=Elisa V.|last5=Colon|first5=Knicole D.|last6=Brande|first6=Jonathan|last7=Collins|first7=Karen A.|last8=Feinstein|first8=Adina D.|last9=Hadden|first9=Samuel|last10=Kane|first10=Stephen R.|last11=Kreidberg|first11=Laura|date=2019-06-27|title=The L 98-59 System: Three Transiting, Terrestrial-Sized Planets Orbiting a Nearby M-dwarf|journal=[The Astronomical Journal](/source/The_Astronomical_Journal)|volume=158|issue=1|pages=32|doi=10.3847/1538-3881/ab2459|arxiv=1903.08017|bibcode=2019AJ....158...32K |issn=1538-3881|hdl=1721.1/124742|s2cid=118855908|hdl-access=free |doi-access=free }} {{Cite web|date=2021-08-06|title=EarthSky {{!}} An inner solar system much like ours, 35 light-years away|url=https://earthsky.org/space/inner-solar-system-much-like-ours-l-98-59/|last=Anderson|first=Paul Scott|access-date=2021-08-07|work=[Earth & Sky](/source/Earth_%26_Sky)|language=en-US}} {{cite web |title = New ESO observations show rocky exoplanet has just half the mass of Venus |url = https://www.eso.org/public/news/eso2112/ |publisher = European Southern Observatory |id = eso2112 |date = 5 August 2021 |access-date = 8 August 2021}} {{Cite web|last=|title=Comparison of the L 98-59 exoplanet system with the inner Solar System|url=https://www.eso.org/public/images/eso2112b/|access-date=2021-08-07|work=[European Southern Observatory](/source/European_Southern_Observatory)|language=en}} {{cite journal |display-authors = etal |first1 = Oliver D. 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Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.