Sh 2-129
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Sh 2-129 (also known as the Flying Bat Nebula), is a large emission nebula and H II region located in the constellation Cepheus. It is part of the Cepheus molecular cloud complex and belongs to the Cep OB2 association.[1][2][3][4] Reflection nebula vdB 140 can be seen near Sh 2-129.[5][6]
| Emission nebula | |
|---|---|
| H II region | |
Image of Sh 2-129 Nebula | |
| Observation data: epoch | |
| Right ascension | 21h 11m 48.00s |
| Declination | +59° 56′ 60.0″ |
| Distance | 520 ± 100 pc |
| Constellation | Cepheus |
| Designations | Sh 2-129, LBN 428 |
Within Sh 2-129 lies a bipolar outflow nebula named Ou 4 (also known as Squid Nebula).[7] The central star of Ou4 is believed to be the massive triple star system named HD 202214 (O9.5IV).[8]
