# Astro (아스트로) (South Korean band)
**Astro** (아스트로; stylized ASTRO) is a South Korean boy group formed by the agency Fantagio, which debuted on February 23, 2016 with the mini album *Spring Up* and the single "Hide & Seek".[1](https://kpop.fandom.com/wiki/ASTRO) The group began as a six-member act, Jinjin (leader), MJ, Cha Eunwoo, [Moonbin](https://www.edgepedia.org/moonbin), Rocky, and Yoon Sanha, and has performed as a four-member group since 2023.[2](https://www.allmusic.com/artist/astro-mn0003539016) • [3](https://kpopdiscover.com/en/groups/astro/) Its fan community is named AROHA, and the group is counted in K-pop's third generation.[3](https://kpopdiscover.com/en/groups/astro/)
| Key fact | Detail |
|---|---|
| Debut | February 23, 2016, mini album *Spring Up*, single "Hide & Seek", under Fantagio[1](https://kpop.fandom.com/wiki/ASTRO) |
| Original members | Jinjin (leader), MJ, Cha Eunwoo, Moonbin, Rocky, Yoon Sanha; previously known as iTeen Boys[2](https://www.allmusic.com/artist/astro-mn0003539016) |
| First chart number one | *Dream Part.01* (2017), the group's first number one on the Gaon charts[4](https://www.allmusic.com/artist/jinjin-rocky-mn0004187439) |
| First full album | *All Light* (2019), which topped the Korean chart and reached the US world charts top ten[2](https://www.allmusic.com/artist/astro-mn0003539016) |
| Sub-units | Moonbin & Sanha (2020); Jinjin & Rocky, debuted January 2022 with the mini album *Restore*[4](https://www.allmusic.com/artist/jinjin-rocky-mn0004187439) |
| Current lineup | Four members since 2023, after Moonbin's death in April 2023 and Rocky's departure that year[3](https://kpopdiscover.com/en/groups/astro/) |
| Fandom | AROHA[3](https://kpopdiscover.com/en/groups/astro/) |
## Formation and debut
Fantagio announced the group in late 2015 through the reality show *Astro OK! Ready*, which introduced the members to viewers before their debut.[2](https://www.allmusic.com/artist/astro-mn0003539016) The members had trained under Fantagio Music and the project was previously known as iTeen Boys.[2](https://www.allmusic.com/artist/astro-mn0003539016) • [4](https://www.allmusic.com/artist/jinjin-rocky-mn0004187439) The Japanese label biography describes the name ASTRO as the word for celestial body or star in Spanish, chosen to express the members' wish to be a universe and stars for the people they love.[5](https://www.universal-music.co.jp/astro/biography/)
*Spring Up* entered the Billboard World Albums chart at number six, and the follow-up EP *Summer Vibes* (July 2016) also placed at number six.[2](https://www.allmusic.com/artist/astro-mn0003539016) The group closed 2016 with *Autumn Story*, its third seasonally titled EP, after concerts in the United States, Korea, Japan, Indonesia, and Thailand.[2](https://www.allmusic.com/artist/astro-mn0003539016)
## Seasonal series and the 2018 interruption
The early releases established a bright, dance-friendly sound built on clean-cut looks, hip-hop beats, and soothing harmonies.[2](https://www.allmusic.com/artist/astro-mn0003539016) *Winter Dream* (February 2017) closed the seasonal concept series, and the group then issued *Dream Part.01* and *Dream Part.02* in 2017; *Dream Part.01* gave Astro its first number one on the Gaon charts.[2](https://www.allmusic.com/artist/astro-mn0003539016) • [4](https://www.allmusic.com/artist/jinjin-rocky-mn0004187439) From "Crazy Sexy Cool" in 2017 onward, the group's freshness began to carry a more adult texture.[3](https://kpopdiscover.com/en/groups/astro/)
**The 2018 hiatus.** Internal label drama placed a follow-up on hold, and the group's only release that year was the EP *Rise Up* (July 2018).[2](https://www.allmusic.com/artist/astro-mn0003539016)
## Breakthrough with All Light
Astro returned in early 2019 with its official debut full-length album, *All Light* (January 16, 2019), which topped the Korean chart and climbed into the top ten of the US world charts.[2](https://www.allmusic.com/artist/astro-mn0003539016) The album, centered on the single "All Night", is credited with widening the group from a fresh-concept act into one followed for singing and visuals as well.[3](https://kpopdiscover.com/en/groups/astro/) "All Night" also gave the group its first music show win, about three years after debut.[6](https://www.lem.lu/pdf/trape/201920/ALVES%20CHAMBEL%2C%20Carolina_%286G3%29_Korean%20Entertainement.pdf) The mini album *Blue Flame* followed in November 2019 and moved the group toward a more grown-up performance style.[2](https://www.allmusic.com/artist/astro-mn0003539016) • [3](https://kpopdiscover.com/en/groups/astro/)
The run continued with *GATEWAY* (2020), whose single "Knock" added scale and storytelling, and the second full album *All Yours* (April 2021), which debuted at number one on the Korean charts and also topped Japan's Oricon charts.[3](https://kpopdiscover.com/en/groups/astro/) • [4](https://www.allmusic.com/artist/jinjin-rocky-mn0004187439) In 2021 the group released the EP *Switch On* and the single "Alive".[7](https://kprofiles.com/astro-who-is-who/)
## Sub-units and the six-member finale
As the members built fan bases of their own, Fantagio began debuting them in smaller units. The duo Moonbin & Sanha debuted in 2020, and Jinjin & Rocky, the group's two rappers, formed the second sub-unit in early 2022, debuting that January with the mini album *Restore*, which featured a guest appearance from Choi Yoojung and reached number seven on the Gaon chart.[4](https://www.allmusic.com/artist/jinjin-rocky-mn0004187439)
The third full album, *Drive to the Starry Road* (May 16, 2022), led by the single "Candy Sugar Pop", became the final Korean studio album released by all six original members.[7](https://kprofiles.com/astro-who-is-who/) • [8](https://cvmsekai.com/astro/)
## 2023 and after
Moonbin died in April 2023, and Rocky left the group the same year, leaving the lineup at four: Jinjin, MJ, Cha Eunwoo, and Yoon Sanha.[3](https://kpopdiscover.com/en/groups/astro/) The group's catalog from the six-member years is treated as shared history, with Moonbin's work kept distinct from the activities of the current lineup.[3](https://kpopdiscover.com/en/groups/astro/) The members have since pursued solo work, including Cha Eunwoo's separate career, alongside group activity.[3](https://kpopdiscover.com/en/groups/astro/)
## Sound and reception
AllMusic characterizes the group as a polished K-pop six-piece blending synth-heavy pop with soothing harmonies, in the styles of K-pop, dance-pop, and pop idol music.[2](https://www.allmusic.com/artist/astro-mn0003539016) A retrospective review feature rated the group's singles with an average of 8.30 out of 10, named "Hide & Seek" its highest-rated song, and identified the period from "Hide & Seek" through the Japanese single "Hanasake Mirai" (2016 to 2019) as its strongest stretch, with no slump phase.[9](https://thebiaslist.com/2026/04/21/astro-a-career-in-song-ratings/)
## References
1. [ASTRO, Kpop Wiki](https://kpop.fandom.com/wiki/ASTRO)
2. [Astro biography by Neil Z. Yeung, AllMusic](https://www.allmusic.com/artist/astro-mn0003539016)
3. [ASTRO profile, KPOP DISCOVER](https://kpopdiscover.com/en/groups/astro/)
4. [Jinjin & Rocky biography, AllMusic](https://www.allmusic.com/artist/jinjin-rocky-mn0004187439)
5. [ASTRO biography, Universal Music Japan](https://www.universal-music.co.jp/astro/biography/)
6. [Korean Entertainment school project file](https://www.lem.lu/pdf/trape/201920/ALVES%20CHAMBEL%2C%20Carolina_%286G3%29_Korean%20Entertainement.pdf)
7. [Astro: Who is Who?, Kpop Profiles](https://kprofiles.com/astro-who-is-who/)
8. [ASTRO Profile: Members, History, Units & Videos, cvmsekai](https://cvmsekai.com/astro/)
9. [ASTRO: A Career In Song Ratings, The Bias List](https://thebiaslist.com/2026/04/21/astro-a-career-in-song-ratings/)
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*Topic: Encyclopedia › Arts and culture › Music › Music scenes › East and Southeast Asian pop scenes › K-pop and the Korean popular music scene › Artists, groups, and people: K-pop and the Korean popular music scene › Third-generation idol groups › Surnames symbols to J*
*Initially written Sep 17, 2026 · Reviewed: Sep 19, 2026; Oct 25, 2026 · Edited: Sep 18, 2026; Sep 19, 2026; Oct 15, 2026; Oct 25, 2026 · Last review: Oct 25, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license