K2-138b is a potentially rocky Super-Earth exoplanet orbiting every 2 days around a K1V star. The planet, along with the four others in the system, was found by citizen scientists of the Exoplanet Explorers project on Zooniverse. It was the final planet found in the system and was officially announced on January 8, 2018. The K2-138 system is unique for being the first exoplanet system discovered entirely by citizen scientists. The K2-138 system, including K2-138b will be studied with CHEOPS to further constrain the mass of the planets with transit-timing variation (TTV).
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| - K2-138b (es)
- K2-138b (en)
- K2-138b (ko)
- K2-138b (zh)
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| - K2-138b는 암석형 외계 행성이며, 슈퍼지구다. 모성인 K2-138b를 매일 2일마다 돌고 있다. 와 과학자들이 협력하여 발견하였으며, 공식적으로는 2018년 1월 발표했다. K2-138b는 1.57 지구반경이다. 이 행성은 모항성을 약 2.4일마다 돌며 모항성과 0.0338AU 떨어져 있다. 이례적으로, 시민들과 과학자들이 최초로 발견한 외계 행성이다. (ko)
- K2-138b是一顆可能為超級地球的太陽系外行星，母恆星是光譜型K1V的恆星，軌道週期2日。該行星和同一個行星系統的其他4顆行星被所屬系外行星搜尋計畫的公民科學家發現。它是該行星系統中最後發現的行星，並於2018年1月8日公布。 K2-138b是K2-138所屬行星中體積最小的行星，半徑為1.57R🜨，代表它可能是岩石質行星。K2-138b的軌道週期為2.35日，軌道半長軸0.0338天文單位。這代表K2-138b表面溫度可能極高，並且表面來自母恆星的輻射通量為地球的486倍。 K2-138行星系統是第一個所屬行星全部由公民科學家發現的特殊例子。 (zh)
- K2-138b es un exoplaneta supertierra potencialmente rocoso que orbita cada dos días alrededor de la estrella K1V. El planeta, junto con los otros cuatro en el sistema, fue encontrado por científicos del proyecto Exoplanet Explorers en Zooniverse. Fue el último planeta encontrado en el sistema y fue anunciado oficialmente el 8 de enero de 2018. El sistema K2-138 es único por ser el primer sistema de exoplanetas descubierto enteramente por científicos voluntarios. (es)
- K2-138b is a potentially rocky Super-Earth exoplanet orbiting every 2 days around a K1V star. The planet, along with the four others in the system, was found by citizen scientists of the Exoplanet Explorers project on Zooniverse. It was the final planet found in the system and was officially announced on January 8, 2018. The K2-138 system is unique for being the first exoplanet system discovered entirely by citizen scientists. The K2-138 system, including K2-138b will be studied with CHEOPS to further constrain the mass of the planets with transit-timing variation (TTV). (en)
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| - Jessie L. Christiansen et al. (en)
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| - K2-138b es un exoplaneta supertierra potencialmente rocoso que orbita cada dos días alrededor de la estrella K1V. El planeta, junto con los otros cuatro en el sistema, fue encontrado por científicos del proyecto Exoplanet Explorers en Zooniverse. Fue el último planeta encontrado en el sistema y fue anunciado oficialmente el 8 de enero de 2018. K2-138b es el planeta más pequeño de K2-138 con un radio de 1,57 R⊕, lo que significa que podría ser rocoso. Orbita su estrella host cada 2,35 días a una distancia de 0,0338 AU. En esta proximidad, el planeta probablemente está muy caliente y recibe 486 veces el flujo estelar como la Tierra. El sistema K2-138 es único por ser el primer sistema de exoplanetas descubierto enteramente por científicos voluntarios. (es)
- K2-138b is a potentially rocky Super-Earth exoplanet orbiting every 2 days around a K1V star. The planet, along with the four others in the system, was found by citizen scientists of the Exoplanet Explorers project on Zooniverse. It was the final planet found in the system and was officially announced on January 8, 2018. K2-138b is the smallest planet of K2-138 with a radius of 1.57 REarth, meaning it could be rocky. It orbits its host star every 2.35 days at a distance of 0.0338 AU. At this proximity, the planet is likely very hot and receives 486 times the stellar flux as Earth. The planet has a Mass of 3.1+1.1−1.1 MEarth and a bulk density of 4.9+2.0−1.8 g/cm−3, which is an earth-like density. The planet has likely a rocky core and a substantial atmospheric layer, composed of volatiles. The K2-138 system is unique for being the first exoplanet system discovered entirely by citizen scientists. The K2-138 system, including K2-138b will be studied with CHEOPS to further constrain the mass of the planets with transit-timing variation (TTV). (en)
- K2-138b는 암석형 외계 행성이며, 슈퍼지구다. 모성인 K2-138b를 매일 2일마다 돌고 있다. 와 과학자들이 협력하여 발견하였으며, 공식적으로는 2018년 1월 발표했다. K2-138b는 1.57 지구반경이다. 이 행성은 모항성을 약 2.4일마다 돌며 모항성과 0.0338AU 떨어져 있다. 이례적으로, 시민들과 과학자들이 최초로 발견한 외계 행성이다. (ko)
- K2-138b是一顆可能為超級地球的太陽系外行星，母恆星是光譜型K1V的恆星，軌道週期2日。該行星和同一個行星系統的其他4顆行星被所屬系外行星搜尋計畫的公民科學家發現。它是該行星系統中最後發現的行星，並於2018年1月8日公布。 K2-138b是K2-138所屬行星中體積最小的行星，半徑為1.57R🜨，代表它可能是岩石質行星。K2-138b的軌道週期為2.35日，軌道半長軸0.0338天文單位。這代表K2-138b表面溫度可能極高，並且表面來自母恆星的輻射通量為地球的486倍。 K2-138行星系統是第一個所屬行星全部由公民科學家發現的特殊例子。 (zh)
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