TOI-715 b

{{Short description|The first exoplanet discovered by TESS in the conservative habitable zone.}}

{{Infobox planet

| discovery_ref =

| discoverer = Dransfield et al.

| discovery_site = TESS

| discovery_method = transit

| inclination = {{Val|89.856|0.018|0.017|ul=deg}}

| p_orbit_ref =

| p_semimajor =

| mean_radius = {{Val|1.55|0.064|ul=Earth radius}}

| single_temperature = {{Val|234|12|ul=K}}
({{val|-39|12|ul=°C}})

| name = TOI-715 b

| discovered = May 10, 2023

| semimajor = {{Val|0.083|0.0027|ul=AU}}

| star = TOI-715

}}

TOI-715 b is a super-Earth exoplanet in the habitable zone of its parent M-type star, TOI-715.{{cite web|title=TOI-715 b|website=Exoplanet catalog|publisher=NASA|access-date=2024-02-04|url=https://exoplanets.nasa.gov/exoplanet-catalog/8921/toi-715-b/}}{{cite web|website=Earth.com|date=February 4, 2024|title=Super-Earth discovered in the "optimal" habitable zone of its star, TOI-715 b|first=Eric |last=Ralls|url=https://www.earth.com/news/super-earth-discovered-in-the-habitable-zone-of-its-star/}}{{cite news|newspaper=The Economic Times|date=February 4, 2024|title=NASA discovers 'Super-Earth' 189 light-years away|url=https://economictimes.indiatimes.com/news/science/nasa-discovers-super-earth-137-light-years-away/articleshow/107404790.cms}} The planet is 1.55 times larger than Earth, and is located at {{convert|0.083|AU|km}} from its star.{{Cite journal |last1=Dransfield |first1=Georgina |last2=Timmermans |first2=Mathilde |last3=Triaud |first3=Amaury H. M. J. |last4=Dévora-Pajares |first4=Martín |last5=Aganze |first5=Christian |last6=Barkaoui |first6=Khalid |last7=Burgasser |first7=Adam J. |last8=Collins |first8=Karen A. |last9=Cointepas |first9=Marion |last10=Ducrot |first10=Elsa |last11=Günther |first11=Maximilian N. |last12=Howell |first12=Steve B. |last13=Murray |first13=Catriona A. |last14=Niraula |first14=Prajwal |last15=Rackham |first15=Benjamin V. |display-authors=1 |date=2023-10-28 |title=A 1.55 R_⊕ habitable-zone planet hosted by TOI-715, an M4 star near the ecliptic South Pole |journal=Monthly Notices of the Royal Astronomical Society |volume=527 |issue=1 |pages=35–52 |arxiv=2305.06206 |doi=10.1093/mnras/stad1439 |doi-access=free |issn=0035-8711 |quote=[W]hile several 'habitable zone' planets discovered by TESS have been confirmed (e.g. Gilbert et al. 2020; Vach et al. 2022), none yet have fallen within the conservative habitable zone as described by Kopparapu et al. (2013)—until now.}} The planet orbits in the habitable zone of its star and has an equilibrium temperature of {{convert|234|K|C}}. It was discovered by the Transiting Exoplanet Survey Satellite (TESS) in 2023;{{cite news|title= NASA announces 'super-Earth,' exoplanet in 'habitable zone'|first=Miranda|last= Nazzaro |date=February 5, 2024|newspaper=The Hill|url= https://thehill.com/homenews/space/4450048-nasa-announces-super-earth-exoplanet-in-habitable-zone/}} according to the authors of the discovery paper, it is the first TESS discovery in the conservative habitable zone.

NASA stated that the James Webb Space Telescope may be used in the future to look for evidence of water or planetary atmosphere.{{cite web|title=Discovery Alert: A 'Super-Earth' in the Habitable Zone|first=Pat |last=Brennan|date=January 31, 2024|website=NASA News and Events|publisher=NASA|url=https://science.nasa.gov/universe/exoplanets/discovery-alert-a-super-earth-in-the-habitable-zone/}}

Additionally, there may be a second exoplanet in the same system, TIC 271971130.02, that, if confirmed, would be the smallest known habitable-zone exoplanet.