| idol_id | 19 |
| Selca owner | rainbow_jaekyung |
| Pop type | K-pop |
| Stage name (romanized) | Jaekyung |
| Stage name (original) | 재경 |
| Real name (romanized) | Kim Jaekyung |
| Real name (original) | 김재경 (金栽經) |
| Birth date | 1988-12-24 (age 35) ▲ ▼ |
| Chinese zodiac sign | 🐉 Dragon |
| Western zodiac sign | ♑ Capricorn |
| Hometown | Seoul |
| Height | 167.9cm (5'6") ▲ ▼ |
| Weight | 56.0kg (123lb) ▲ ▼ |
| Blood type | AB |
| Debut date | 2009-11-12 (14 years and 5 months ago) ▲ ▼ |
| Country of origin | 
Korea, Republic of |
| Name | Company | Debut date | Disbandment date | Current member | Roles | |
|---|---|---|---|---|---|---|
|
(레인보우)
|
DSP | 2009-11-12 | 2016-10-27 | Group disbanded | Leader, Main dancer |
| Name | Debut date | |
|---|---|---|
|
(레인보우 블랙)
|
2014-01-20 |